diff --git a/app/controllers/payments.js b/app/controllers/payments.js
index b7ef4bfc66..16a5c42c54 100644
--- a/app/controllers/payments.js
+++ b/app/controllers/payments.js
@@ -2,7 +2,7 @@ const config = require('config')
 const stripe = require('stripe')(config.stripe.api_secret)
 
 exports.post = (req, res) => {
-  let amount = 1000
+  const amount = 1000
 
   stripe.customers.create({
     email: req.body.stripeEmail,
diff --git a/app/db/config/config.js b/app/db/config/config.js
index 579695957f..2d46de9764 100644
--- a/app/db/config/config.js
+++ b/app/db/config/config.js
@@ -1,24 +1,24 @@
 require('dotenv').config()
 
 module.exports = {
-  'development': {
-    'database': 'streetmix_dev',
-    'host': process.env.PGHOST || '127.0.0.1',
-    'port': process.env.PGPORT || 5432,
-    'dialect': 'postgres'
+  development: {
+    database: 'streetmix_dev',
+    host: process.env.PGHOST || '127.0.0.1',
+    port: process.env.PGPORT || 5432,
+    dialect: 'postgres'
   },
-  'test': {
-    'database': 'streetmix_test',
-    'host': process.env.PGHOST || '127.0.0.1',
-    'port': process.env.PGPORT || 5432,
-    'dialect': 'postgres'
+  test: {
+    database: 'streetmix_test',
+    host: process.env.PGHOST || '127.0.0.1',
+    port: process.env.PGPORT || 5432,
+    dialect: 'postgres'
   },
-  'staging': {
-    'use_env_variable': 'DATABASE_URL',
-    'dialect': 'postgres'
+  staging: {
+    use_env_variable: 'DATABASE_URL',
+    dialect: 'postgres'
   },
-  'production': {
-    'use_env_variable': 'DATABASE_URL',
-    'dialect': 'postgres'
+  production: {
+    use_env_variable: 'DATABASE_URL',
+    dialect: 'postgres'
   }
 }
diff --git a/app/db/migrations/20180729103424-create-street.js b/app/db/migrations/20180729103424-create-street.js
index bd2b52cba5..80427aace8 100644
--- a/app/db/migrations/20180729103424-create-street.js
+++ b/app/db/migrations/20180729103424-create-street.js
@@ -12,7 +12,7 @@ module.exports = {
       },
       status: {
         type: Sequelize.ENUM,
-        values: [ 'ACTIVE', 'DELETED' ],
+        values: ['ACTIVE', 'DELETED'],
         defaultValue: 'ACTIVE'
       },
       name: {
diff --git a/app/db/models/street.js b/app/db/models/street.js
index 77e7d54f42..6b2ddcc5a7 100644
--- a/app/db/models/street.js
+++ b/app/db/models/street.js
@@ -9,7 +9,7 @@ module.exports = (sequelize, DataTypes) => {
     namespaced_id: DataTypes.INTEGER,
     status: {
       type: DataTypes.ENUM,
-      values: [ 'ACTIVE', 'DELETED' ],
+      values: ['ACTIVE', 'DELETED'],
       defaultValue: 'ACTIVE'
     },
     name: DataTypes.STRING,
diff --git a/app/models/__mocks__/sequence.js b/app/models/__mocks__/sequence.js
index a612153a0d..d8328073fa 100644
--- a/app/models/__mocks__/sequence.js
+++ b/app/models/__mocks__/sequence.js
@@ -2,7 +2,7 @@
 
 const dummySequence = {
   _id: 'streets',
-  '__v': 0,
+  __v: 0,
   seq: 65
 }
 
diff --git a/app/models/__mocks__/street.js b/app/models/__mocks__/street.js
index d6ef979e3b..4459998c98 100644
--- a/app/models/__mocks__/street.js
+++ b/app/models/__mocks__/street.js
@@ -1,7 +1,7 @@
 /* eslint-env jest */
 const dummySequence = {
   _id: 'streets',
-  '__v': 0,
+  __v: 0,
   seq: 65
 }
 
diff --git a/app/models/__mocks__/user.js b/app/models/__mocks__/user.js
index 15795a96dd..d70952634c 100644
--- a/app/models/__mocks__/user.js
+++ b/app/models/__mocks__/user.js
@@ -1,7 +1,7 @@
 /* eslint-env jest */
 const mockUsers = {
   user1: {
-    login_tokens: [ 'xxxxxxxx-xxxx-xxxx-xxxx-1111111111111' ],
+    login_tokens: ['xxxxxxxx-xxxx-xxxx-xxxx-1111111111111'],
     _id: '1',
     id: 'user1',
     last_street_id: '3e888ae0-5f48-11e8-82e7-c3447c17015a',
@@ -15,7 +15,7 @@ const mockUsers = {
     roles: []
   },
   user2: {
-    login_tokens: [ 'xxxxxxxx-xxxx-xxxx-xxxx-2222222222222' ],
+    login_tokens: ['xxxxxxxx-xxxx-xxxx-xxxx-2222222222222'],
     _id: '2',
     id: 'user2',
     twitter_id: '2',
@@ -28,7 +28,7 @@ const mockUsers = {
     roles: []
   },
   admin: {
-    login_tokens: [ 'xxxxxxxx-xxxx-xxxx-xxxx-3333333333333' ],
+    login_tokens: ['xxxxxxxx-xxxx-xxxx-xxxx-3333333333333'],
     _id: '3',
     id: 'admin',
     twitter_id: '3',
@@ -38,7 +38,7 @@ const mockUsers = {
     },
     updated_at: '2018-05-22T14:18:09.853Z',
     created_at: '2018-05-21T19:35:10.807Z',
-    roles: [ 'ADMIN' ]
+    roles: ['ADMIN']
   }
 }
 
diff --git a/app/models/street.js b/app/models/street.js
index 15fc34a7ac..d522084017 100644
--- a/app/models/street.js
+++ b/app/models/street.js
@@ -5,7 +5,7 @@ const User = require('./user.js')
 const streetSchema = new mongoose.Schema({
   id: { type: String, index: { unique: true } },
   namespaced_id: { type: Number, index: true },
-  status: { type: String, enum: [ 'ACTIVE', 'DELETED' ], default: 'ACTIVE' },
+  status: { type: String, enum: ['ACTIVE', 'DELETED'], default: 'ACTIVE' },
   name: String,
   creator_id: {
     type: mongoose.Schema.ObjectId,
diff --git a/app/models/street_data.js b/app/models/street_data.js
index 95c7596826..27f993d1c8 100644
--- a/app/models/street_data.js
+++ b/app/models/street_data.js
@@ -40,7 +40,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 4:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk-lamp') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -50,7 +50,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 5:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'streetcar') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -60,7 +60,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 6:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'bus-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -74,7 +74,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 7:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'bike-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -84,7 +84,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 8:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'drive-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -94,7 +94,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 9:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -104,7 +104,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 10:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'planting-strip') {
           segment.type = 'divider'
@@ -119,7 +119,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 11:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'divider') {
           if (segment.variantString === 'small-tree') {
@@ -133,7 +133,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 12:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk-bike-rack') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -143,7 +143,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 13:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk-wayfinding') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -153,7 +153,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 14:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk') {
           segment.randSeed = 35
@@ -163,7 +163,7 @@ function incrementSchemaVersion (street) {
     case 15:
       break
     case 16:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'bike-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
diff --git a/app/models/user.js b/app/models/user.js
index 0babba147d..1128b121fe 100644
--- a/app/models/user.js
+++ b/app/models/user.js
@@ -6,14 +6,14 @@ const userSchema = new mongoose.Schema({
   twitter_credentials: mongoose.Schema.Types.Mixed,
   auth0_id: String,
   email: { type: String, index: { unique: true, sparse: true } },
-  login_tokens: [ String ],
+  login_tokens: [String],
   profile_image_url: String,
   data: mongoose.Schema.Types.Mixed,
   created_at: Date,
   updated_at: Date,
   last_street_id: Number,
   flags: mongoose.Schema.Types.Mixed,
-  roles: [ String ]
+  roles: [String]
 })
 
 userSchema.pre('save', function (next) {
diff --git a/app/resources/v1/flags.js b/app/resources/v1/flags.js
index ec3db452ca..9fc87e410c 100644
--- a/app/resources/v1/flags.js
+++ b/app/resources/v1/flags.js
@@ -24,7 +24,7 @@ async function readFlags (res) {
 function sendSuccessResponse (res, flags) {
   res.set({
     'Content-Type': 'application/json; charset=utf-8',
-    'Location': config.restapi.baseuri + '/v1/flags',
+    Location: config.restapi.baseuri + '/v1/flags',
     'Cache-Control': 'max-age=86400'
   })
 
@@ -32,7 +32,7 @@ function sendSuccessResponse (res, flags) {
 }
 
 exports.get = async function (req, res) {
-  let flags = await readFlags(res)
+  const flags = await readFlags(res)
 
   if (flags) {
     sendSuccessResponse(res, flags)
diff --git a/app/resources/v1/streets.js b/app/resources/v1/streets.js
index 030b1c69e3..37c2d2495c 100644
--- a/app/resources/v1/streets.js
+++ b/app/resources/v1/streets.js
@@ -32,12 +32,12 @@ exports.post = async function (req, res) {
     try {
       if (street.creator_id) {
         const row = await User.findByIdAndUpdate(street.creator_id,
-          { $inc: { 'last_street_id': 1 } },
+          { $inc: { last_street_id: 1 } },
           { new: true, upsert: true })
         namespacedId = (row) ? row.last_street_id : null
       } else {
         const row = await Sequence.findByIdAndUpdate('streets',
-          { $inc: { 'seq': 1 } },
+          { $inc: { seq: 1 } },
           { new: true, upsert: true })
         namespacedId = (row) ? row.seq : null
       }
@@ -112,7 +112,7 @@ exports.post = async function (req, res) {
   if (req.loginToken) {
     let user
     try {
-      user = await User.findOne({ login_tokens: { $in: [ req.loginToken ] } })
+      user = await User.findOne({ login_tokens: { $in: [req.loginToken] } })
     } catch (err) {
       logger.error(err)
       handleErrors(ERRORS.USER_NOT_FOUND)
@@ -147,7 +147,7 @@ exports.delete = async function (req, res) {
   async function deleteStreet (street) {
     let user
     try {
-      user = await User.findOne({ login_tokens: { $in: [ req.loginToken ] } })
+      user = await User.findOne({ login_tokens: { $in: [req.loginToken] } })
     } catch (err) {
       logger.error(err)
       throw new Error(ERRORS.USER_NOT_FOUND)
@@ -327,9 +327,8 @@ exports.find = function (req, res) {
     }
 
     if (start + streets.length < totalNumStreets) {
-      let nextStart, nextCount
-      nextStart = start + count
-      nextCount = Math.min(count, totalNumStreets - start - streets.length)
+      const nextStart = start + count
+      const nextCount = Math.min(count, totalNumStreets - start - streets.length)
       json.meta.links.next = config.restapi.baseuri + '/v1/streets?start=' + nextStart + '&count=' + nextCount
     }
 
@@ -431,7 +430,7 @@ exports.put = async function (req, res) {
   async function updateStreetWithCreatorId (street) {
     let user
     try {
-      user = await User.findOne({ login_tokens: { $in: [ req.loginToken ] } })
+      user = await User.findOne({ login_tokens: { $in: [req.loginToken] } })
     } catch (err) {
       logger.error(err)
       handleErrors(ERRORS.CANNOT_UPDATE_STREET)
diff --git a/app/resources/v1/streets_pg.js b/app/resources/v1/streets_pg.js
index 0d15686e08..adfc05e551 100644
--- a/app/resources/v1/streets_pg.js
+++ b/app/resources/v1/streets_pg.js
@@ -139,7 +139,7 @@ exports.post = async function (req, res) {
     let user
     try {
       user = await User.findOne({
-        where: { login_tokens: { [Op.contains]: [ req.loginToken ] } }
+        where: { login_tokens: { [Op.contains]: [req.loginToken] } }
       })
     } catch (err) {
       logger.error(err)
@@ -176,7 +176,7 @@ exports.delete = async function (req, res) {
     let user
     try {
       user = await User.findOne({
-        where: { login_tokens: { [Op.contains]: [ req.loginToken ] } }
+        where: { login_tokens: { [Op.contains]: [req.loginToken] } }
       })
     } catch (err) {
       logger.error(err)
@@ -307,7 +307,7 @@ exports.find = async function (req, res) {
   const findStreets = async function (start, count) {
     return Street.findAndCountAll({
       where: { status: 'ACTIVE' },
-      order: [ ['updated_at', 'DESC'] ],
+      order: [['updated_at', 'DESC']],
       offset: start,
       limit: count
     })
@@ -378,9 +378,8 @@ exports.find = async function (req, res) {
     }
 
     if (start + streets.length < totalNumStreets) {
-      let nextStart, nextCount
-      nextStart = start + count
-      nextCount = Math.min(count, totalNumStreets - start - streets.length)
+      const nextStart = start + count
+      const nextCount = Math.min(count, totalNumStreets - start - streets.length)
       json.meta.links.next = config.restapi.baseuri + '/v1/streets?start=' + nextStart + '&count=' + nextCount
     }
     res.status(200).send(json)
@@ -484,7 +483,7 @@ exports.put = async function (req, res) {
     let user
     try {
       user = await User.findOne({
-        where: { login_tokens: { [Op.contains]: [ req.loginToken ] } }
+        where: { login_tokens: { [Op.contains]: [req.loginToken] } }
       })
     } catch (err) {
       logger.error(err)
diff --git a/app/resources/v1/translate.js b/app/resources/v1/translate.js
index f6c78183bc..62591c9ba2 100644
--- a/app/resources/v1/translate.js
+++ b/app/resources/v1/translate.js
@@ -27,7 +27,7 @@ async function getLocalTranslation (res, locale, resource) {
 function sendSuccessResponse (res, locale, resource, translation) {
   res.set({
     'Content-Type': 'application/json; charset=utf-8',
-    'Location': config.restapi.baseuri + '/v1/translate/' + locale + '/' + resource,
+    Location: config.restapi.baseuri + '/v1/translate/' + locale + '/' + resource,
     'Cache-Control': 'max-age=86400'
   })
 
diff --git a/app/resources/v1/user.js b/app/resources/v1/user.js
index 1b4ecc9051..6bf7487ea8 100644
--- a/app/resources/v1/user.js
+++ b/app/resources/v1/user.js
@@ -34,7 +34,7 @@ exports.get = async function (req, res) {
 
   const findUserByLoginToken = async function (loginToken) {
     try {
-      requestUser = await User.findOne({ login_tokens: { $in: [ loginToken ] } })
+      requestUser = await User.findOne({ login_tokens: { $in: [loginToken] } })
     } catch (err) {
       logger.error(err)
       throw new Error(ERRORS.CANNOT_GET_USER)
diff --git a/app/resources/v1/users.js b/app/resources/v1/users.js
index 42c31552e1..98d0982ab0 100644
--- a/app/resources/v1/users.js
+++ b/app/resources/v1/users.js
@@ -47,7 +47,7 @@ exports.post = function (req, res) {
         const u = new User({
           id: credentials.screenName,
           auth0_id: credentials.auth0_id,
-          login_tokens: [ loginToken ],
+          login_tokens: [loginToken],
           profile_image_url: credentials.profile_image_url
         })
         u.save(handleCreateUser)
@@ -80,7 +80,7 @@ exports.post = function (req, res) {
             access_token_key: twitterCredentials.oauthAccessTokenKey,
             access_token_secret: twitterCredentials.oauthAccessTokenSecret
           },
-          login_tokens: [ loginToken ]
+          login_tokens: [loginToken]
         })
         u.save(handleCreateUser)
       } else {
@@ -145,7 +145,7 @@ exports.post = function (req, res) {
             id: credentials.nickname,
             auth0_id: credentials.auth0_id,
             email: credentials.email,
-            login_tokens: [ loginToken ],
+            login_tokens: [loginToken],
             profile_image_url: credentials.profile_image_url
           })
           u.save(handleCreateUser)
@@ -155,7 +155,7 @@ exports.post = function (req, res) {
             id: id,
             auth0_id: credentials.auth0_id,
             email: credentials.email,
-            login_tokens: [ loginToken ],
+            login_tokens: [loginToken],
             profile_image_url: credentials.profile_image_url
           })
           u.save(handleCreateUser)
@@ -184,11 +184,11 @@ exports.post = function (req, res) {
     return
   }
 
-  if (body.hasOwnProperty('twitter')) {
+  if (Object.prototype.hasOwnProperty.call(body, 'twitter')) {
     handleTwitterSignIn(body.twitter)
-  } else if (body.hasOwnProperty('auth0_twitter')) {
+  } else if (Object.prototype.hasOwnProperty.call(body, 'auth0_twitter')) {
     handleAuth0TwitterSignIn(body.auth0_twitter)
-  } else if (body.hasOwnProperty('auth0')) {
+  } else if (Object.prototype.hasOwnProperty.call(body, 'auth0')) {
     handleAuth0SignIn(body.auth0)
   } else {
     res.status(400).send('Unknown sign-in method used.')
@@ -242,7 +242,7 @@ exports.get = function (req, res) {
   }
 
   const handleFindUsers = function (users) {
-    let usersArray = []
+    const usersArray = []
 
     const getUserJson = function (user) {
       user.asJson({ auth: true }, function (err, userJson) {
diff --git a/app/resources/v1/users_pg.js b/app/resources/v1/users_pg.js
index 8014522c99..83dab12827 100644
--- a/app/resources/v1/users_pg.js
+++ b/app/resources/v1/users_pg.js
@@ -45,7 +45,7 @@ exports.post = async function (req, res) {
     // }
     loginToken = uuid.v1()
 
-    if (body.hasOwnProperty('twitter')) {
+    if (Object.prototype.hasOwnProperty.call(body, 'twitter')) {
       const credentials = body.twitter
       return {
         id: credentials.screenName,
@@ -54,23 +54,23 @@ exports.post = async function (req, res) {
           access_token_key: credentials.oauthAccessTokenKey,
           access_token_secret: credentials.oauthAccessTokenSecret
         },
-        login_tokens: [ loginToken ]
+        login_tokens: [loginToken]
       }
-    } else if (body.hasOwnProperty('auth0_twitter')) {
+    } else if (Object.prototype.hasOwnProperty.call(body, 'auth0_twitter')) {
       const credentials = body.auth0_twitter
       return {
         id: credentials.screenName,
         auth0_id: credentials.auth0_id,
-        login_tokens: [ loginToken ],
+        login_tokens: [loginToken],
         profile_image_url: credentials.profile_image_url
       }
-    } else if (body.hasOwnProperty('auth0_email')) {
+    } else if (Object.prototype.hasOwnProperty.call(body, 'auth0_email')) {
       const credentials = body.auth0_email
       return {
         id: credentials.nickname,
         auth0_id: credentials.auth0_id,
         email: credentials.email,
-        login_tokens: [ loginToken ],
+        login_tokens: [loginToken],
         profile_image_url: credentials.profile_image_url
       }
     }
@@ -209,7 +209,7 @@ exports.get = async function (req, res) {
     let user
     try {
       user = await User.findOne({
-        where: { login_tokens: { [Op.contains]: [ loginToken ] } }
+        where: { login_tokens: { [Op.contains]: [loginToken] } }
       })
     } catch (err) {
       logger.error(err)
diff --git a/app/resources/v1/users_streets_pg.js b/app/resources/v1/users_streets_pg.js
index ca1ee815c9..e4be1b7f29 100644
--- a/app/resources/v1/users_streets_pg.js
+++ b/app/resources/v1/users_streets_pg.js
@@ -16,7 +16,7 @@ exports.get = async function (req, res) {
           model: User,
           where: { creator_id: userId }
         }],
-        order: [ ['updated_at', 'DESC'] ]
+        order: [['updated_at', 'DESC']]
       })
     } catch (err) {
       logger.error(err)
diff --git a/assets/scripts/app/DebugInfo.jsx b/assets/scripts/app/DebugInfo.jsx
index bc9b189cf9..9fcfd17c8a 100644
--- a/assets/scripts/app/DebugInfo.jsx
+++ b/assets/scripts/app/DebugInfo.jsx
@@ -48,22 +48,22 @@ export class DebugInfo extends React.Component {
     const debugUndo = cloneDeep(this.props.undo)
 
     // Some things just shouldn't be seen...
-    for (let i in debugStreetData.segments) {
+    for (const i in debugStreetData.segments) {
       delete debugStreetData.segments[i].el
     }
 
-    for (let j in debugUndo) {
-      for (let k in debugUndo[j].segments) {
+    for (const j in debugUndo) {
+      for (const k in debugUndo[j].segments) {
         delete debugUndo[j].segments[k].el
       }
     }
 
     // Create a JSON object, this parses better in editors
     const debugObj = {
-      'DATA': debugStreetData,
-      'SETTINGS': this.props.settings,
-      'FLAGS': this.props.flags,
-      'UNDO': debugUndo
+      DATA: debugStreetData,
+      SETTINGS: this.props.settings,
+      FLAGS: this.props.flags,
+      UNDO: debugUndo
     }
 
     return JSON.stringify(debugObj, null, 2)
diff --git a/assets/scripts/app/SkyBackground.jsx b/assets/scripts/app/SkyBackground.jsx
index 1412ca4399..6b77a6a679 100644
--- a/assets/scripts/app/SkyBackground.jsx
+++ b/assets/scripts/app/SkyBackground.jsx
@@ -74,7 +74,7 @@ export class SkyBackground extends React.PureComponent {
       opacity: environs.cloudOpacity || null
     }
 
-    let foregroundStyle = {}
+    const foregroundStyle = {}
     if (environs.foregroundGradient) {
       foregroundStyle.backgroundImage = makeCSSGradientDeclaration(environs.foregroundGradient)
       foregroundStyle.opacity = 1
diff --git a/assets/scripts/app/StreetView.jsx b/assets/scripts/app/StreetView.jsx
index befe07322e..d6b5857e31 100644
--- a/assets/scripts/app/StreetView.jsx
+++ b/assets/scripts/app/StreetView.jsx
@@ -138,7 +138,7 @@ class StreetView extends React.Component {
   onResize = () => {
     const { viewportWidth, viewportHeight } = this.props.system
     let streetSectionTop
-    let streetSectionHeight = this.streetSectionInner.offsetHeight
+    const streetSectionHeight = this.streetSectionInner.offsetHeight
 
     if (viewportHeight - streetSectionHeight > 450) {
       streetSectionTop = ((viewportHeight - streetSectionHeight - 450) / 2) + 450 + 80
@@ -150,7 +150,7 @@ class StreetView extends React.Component {
       streetSectionTop += 80
     }
 
-    let scrollTop = (streetSectionTop + streetSectionHeight)
+    const scrollTop = (streetSectionTop + streetSectionHeight)
 
     // Not sure what 255 does, but it keeps it from getting too tall
     // `skyHeight` is needed so that when gallery opens and the
diff --git a/assets/scripts/app/WelcomePanel/NewStreet.jsx b/assets/scripts/app/WelcomePanel/NewStreet.jsx
index ced074992b..219700618e 100644
--- a/assets/scripts/app/WelcomePanel/NewStreet.jsx
+++ b/assets/scripts/app/WelcomePanel/NewStreet.jsx
@@ -35,7 +35,7 @@ function NewStreet (props) {
       break
   }
 
-  const [ state, setState ] = useState({ selectedNewStreetType })
+  const [state, setState] = useState({ selectedNewStreetType })
 
   // Handles changing the "checked" state of the input buttons.
   function onChangeNewStreetType (event) {
diff --git a/assets/scripts/app/event_tracking.js b/assets/scripts/app/event_tracking.js
index 832f705975..5ab9aff603 100644
--- a/assets/scripts/app/event_tracking.js
+++ b/assets/scripts/app/event_tracking.js
@@ -2,7 +2,7 @@
 // Contains identifiers for actions that should only be tracked
 // once per user session, as defined by the boolean value of
 // onlyFirstTime passed to eventTracking.track()
-let alreadyTracked = []
+const alreadyTracked = []
 
 // These constants define what are valid actions, labels and categories for Streetmix.
 // They're stored as strings so that they can be passed around instead of needing to
@@ -12,35 +12,35 @@ let alreadyTracked = []
 // constants to define action types.
 // Strings are not namespaced to keep trackEvent() calls shorter.
 const TRACK_CATEGORY = {
-  'INTERACTION': 'Interaction',
-  'EVENT': 'Event',
-  'ERROR': 'Error',
-  'SYSTEM': 'System',
-  'SHARING': 'Sharing'
+  INTERACTION: 'Interaction',
+  EVENT: 'Event',
+  ERROR: 'Error',
+  SYSTEM: 'System',
+  SHARING: 'Sharing'
 }
 
 const TRACK_ACTION = {
-  'TOUCH_CAPABLE': 'Touch capability detected',
-  'OPEN_GALLERY': 'Open gallery',
-  'UNDO': 'Undo',
-  'CHANGE_WIDTH': 'Change width',
-  'REMOVE_SEGMENT': 'Remove segment',
-  'LEARN_MORE': 'Learn more about segment',
-  'FACEBOOK': 'Facebook',
-  'TWITTER': 'Twitter',
-  'ERROR_15A': 'Error 15A (sign in API failure)',
-  'ERROR_RM1': 'Error RM1 (auth 401 failure on load)',
-  'ERROR_RM2': 'Error RM2 (auth 401 failure mid-flight)',
-  'ERROR_GEOLOCATION_TIMEOUT': 'Geolocation timeout',
-  'STREET_MODIFIED_ELSEWHERE': 'Street modified elsewhere'
+  TOUCH_CAPABLE: 'Touch capability detected',
+  OPEN_GALLERY: 'Open gallery',
+  UNDO: 'Undo',
+  CHANGE_WIDTH: 'Change width',
+  REMOVE_SEGMENT: 'Remove segment',
+  LEARN_MORE: 'Learn more about segment',
+  FACEBOOK: 'Facebook',
+  TWITTER: 'Twitter',
+  ERROR_15A: 'Error 15A (sign in API failure)',
+  ERROR_RM1: 'Error RM1 (auth 401 failure on load)',
+  ERROR_RM2: 'Error RM2 (auth 401 failure mid-flight)',
+  ERROR_GEOLOCATION_TIMEOUT: 'Geolocation timeout',
+  STREET_MODIFIED_ELSEWHERE: 'Street modified elsewhere'
 }
 
 const TRACK_LABEL = {
-  'BUTTON': 'Button',
-  'DRAGGING': 'Dragging',
-  'INPUT_FIELD': 'Input field',
-  'INCREMENT_BUTTON': 'Increment button',
-  'KEYBOARD': 'Keyboard'
+  BUTTON: 'Button',
+  DRAGGING: 'Dragging',
+  INPUT_FIELD: 'Input field',
+  INCREMENT_BUTTON: 'Increment button',
+  KEYBOARD: 'Keyboard'
 }
 
 /**
diff --git a/assets/scripts/app/flag_utils.js b/assets/scripts/app/flag_utils.js
index e8211a4044..d9b7915e23 100644
--- a/assets/scripts/app/flag_utils.js
+++ b/assets/scripts/app/flag_utils.js
@@ -3,9 +3,9 @@ import store, { observeStore } from '../store'
 import { setFlagOverrides } from '../store/actions/flags'
 
 export const PRIORITY_LEVELS = {
-  'initial': 0,
-  'user': 1,
-  'session': 2
+  initial: 0,
+  user: 1,
+  session: 2
 }
 
 export function initializeFlagSubscribers () {
diff --git a/assets/scripts/app/initialization.js b/assets/scripts/app/initialization.js
index 7ed2936a77..fd72b34a5a 100644
--- a/assets/scripts/app/initialization.js
+++ b/assets/scripts/app/initialization.js
@@ -84,7 +84,7 @@ export async function initialize () {
   const geo = await detectGeolocation()
 
   // Parallel tasks
-  await Promise.all([ loadImages(), geo, initLocale() ])
+  await Promise.all([loadImages(), geo, initLocale()])
 
   if (geo && geo.country_code) {
     updateSettingsFromCountryCode(geo.country_code)
diff --git a/assets/scripts/app/keypress.js b/assets/scripts/app/keypress.js
index 7f3cac370b..3d54cd27c0 100644
--- a/assets/scripts/app/keypress.js
+++ b/assets/scripts/app/keypress.js
@@ -18,48 +18,48 @@ import { isFocusOnBody } from '../util/focus'
 
 // TODO: Flesh out this dictionary
 const KEYS = {
-  'left': 37,
-  'right': 39,
-  'enter': 13,
-  'backspace': 8,
-  'delete': 46,
-  'esc': 27,
-  '0': 48,
-  '1': 49,
-  '2': 50,
-  '3': 51,
-  '4': 52,
-  '5': 53,
-  '6': 54,
-  '7': 55,
-  '8': 56,
-  '9': 57,
-  'a': 65,
-  'b': 66,
-  'c': 67,
-  'd': 68,
-  'e': 69,
-  'f': 70,
-  'g': 71,
-  'h': 72,
-  'i': 73,
-  'j': 74,
-  'k': 75,
-  'l': 76,
-  'm': 77,
-  'n': 78,
-  'o': 79,
-  'p': 80,
-  'q': 81,
-  'r': 82,
-  's': 83,
-  't': 84,
-  'u': 85,
-  'v': 86,
-  'w': 87,
-  'x': 88,
-  'y': 89,
-  'z': 90,
+  left: 37,
+  right: 39,
+  enter: 13,
+  backspace: 8,
+  delete: 46,
+  esc: 27,
+  0: 48,
+  1: 49,
+  2: 50,
+  3: 51,
+  4: 52,
+  5: 53,
+  6: 54,
+  7: 55,
+  8: 56,
+  9: 57,
+  a: 65,
+  b: 66,
+  c: 67,
+  d: 68,
+  e: 69,
+  f: 70,
+  g: 71,
+  h: 72,
+  i: 73,
+  j: 74,
+  k: 75,
+  l: 76,
+  m: 77,
+  n: 78,
+  o: 79,
+  p: 80,
+  q: 81,
+  r: 82,
+  s: 83,
+  t: 84,
+  u: 85,
+  v: 86,
+  w: 87,
+  x: 88,
+  y: 89,
+  z: 90,
   // '=': [187, 61],
   '+': [187, 61, 107], // = or +; 61 for Firefox; 107 for keypad
   '-': [189, 173, 109], // 109 for keypad; 173 for Firefox
@@ -68,7 +68,7 @@ const KEYS = {
 }
 
 // Keep track of all registered commands here
-let inputs = {}
+const inputs = {}
 
 // Utility functions
 const noop = function () {}
@@ -197,12 +197,12 @@ export function registerKeypress (commands, options, callback) {
   const commandObj = processCommands(commands)
 
   // Process each command input
-  for (let keyCode in commandObj) {
-    let commands = commandObj[keyCode]
+  for (const keyCode in commandObj) {
+    const commands = commandObj[keyCode]
 
-    for (let command of commands) {
+    for (const command of commands) {
       // Get default settings
-      for (let key in defaults) {
+      for (const key in defaults) {
         if (typeof command[key] === 'undefined') {
           command[key] = defaults[key]
         }
@@ -227,7 +227,7 @@ export function registerKeypress (commands, options, callback) {
       // This basically allows other code to override settings via the
       // options object - it's dumb, but there's no protection against it,
       // and who knows, could be useful in edge cases
-      for (let k in options) {
+      for (const k in options) {
         command[k] = options[k]
       }
 
@@ -264,16 +264,16 @@ export function deregisterKeypress (commands, callback) {
   const commandObj = processCommands(commands)
 
   // Process each command input
-  for (let keyCode in commandObj) {
+  for (const keyCode in commandObj) {
     const commands = commandObj[keyCode]
 
-    for (let command of commands) {
-      let items = inputs[keyCode]
+    for (const command of commands) {
+      const items = inputs[keyCode]
       let x = items.length
 
       // A reverse while loop quickly removes all duplicates that matches
       while (x--) {
-        let item = items[x]
+        const item = items[x]
         if (item.onKeypress === callback || typeof callback === 'undefined') {
           // Check for equality for command + function
           if ((item.shiftKey === command.shiftKey || item.shiftKey === 'optional') &&
@@ -304,7 +304,7 @@ function processCommands (commands) {
     commands = new Array(commands)
   }
 
-  let commandsObj = {}
+  const commandsObj = {}
 
   // Process each command input
   for (let command of commands) {
@@ -315,7 +315,7 @@ function processCommands (commands) {
       .replace(/(command|cmd|control|ctrl)/g, 'meta')
       .split(' ')
 
-    let settings = {
+    const settings = {
       shiftKey: false,
       altKey: false,
       metaKey: false
@@ -323,19 +323,19 @@ function processCommands (commands) {
 
     // Check for existence of modifier keys
     // Modifier keys are removed from input array
-    let isShift = command.indexOf('shift')
+    const isShift = command.indexOf('shift')
     if (isShift > -1) {
       settings.shiftKey = true
       command.splice(isShift, 1)
     }
 
-    let isAlt = command.indexOf('alt')
+    const isAlt = command.indexOf('alt')
     if (isAlt > -1) {
       settings.altKey = true
       command.splice(isAlt, 1)
     }
 
-    let isMeta = command.indexOf('meta')
+    const isMeta = command.indexOf('meta')
     if (isMeta > -1) {
       settings.metaKey = true
       command.splice(isMeta, 1)
@@ -343,7 +343,7 @@ function processCommands (commands) {
 
     // First remaining item in the input array is the key code to test for.
     // Does not support multi-keys, so rest of input (if provided) is ignored.
-    let keyCode = KEYS[command[0]]
+    const keyCode = KEYS[command[0]]
 
     // Keycodes might be a single number or an array
     if (keyCode) {
@@ -356,7 +356,7 @@ function processCommands (commands) {
         keys = keyCode
       }
 
-      for (let key of keys) {
+      for (const key of keys) {
         settings.keyCode = key
         if (typeof commandsObj[key] === 'undefined') {
           commandsObj[key] = []
@@ -371,14 +371,14 @@ function processCommands (commands) {
 }
 
 function onGlobalKeyDown (event) {
-  let toExecute = []
+  const toExecute = []
 
   // Find the right command object
   const commandsForKeyCode = inputs[event.keyCode]
   if (!commandsForKeyCode || commandsForKeyCode.length === 0) return
 
   // Check if the right meta keys are down
-  for (let item of commandsForKeyCode) {
+  for (const item of commandsForKeyCode) {
     if ((item.shiftKey === event.shiftKey || item.shiftKey === 'optional') &&
         (item.altKey === event.altKey || item.altKey === 'optional') &&
         (item.metaKey === event.metaKey || item.metaKey === event.ctrlKey || item.metaKey === 'optional')) {
@@ -387,7 +387,7 @@ function onGlobalKeyDown (event) {
   }
 
   // Execute input's callbacks, if found
-  for (let input of toExecute) {
+  for (const input of toExecute) {
     execute(input, event)
   }
 }
diff --git a/assets/scripts/app/load_resources.js b/assets/scripts/app/load_resources.js
index 9512d2659a..cf21f5de24 100644
--- a/assets/scripts/app/load_resources.js
+++ b/assets/scripts/app/load_resources.js
@@ -23,10 +23,10 @@ const IMAGES_TO_BE_LOADED = [
 ]
 
 const SVGStagingEl = document.getElementById('svg')
-let loading = []
+const loading = []
 
 export async function loadImages () {
-  for (let url of IMAGES_TO_BE_LOADED) {
+  for (const url of IMAGES_TO_BE_LOADED) {
     loading.push(loadImage(url))
   }
 
@@ -48,9 +48,9 @@ async function loadImage (url) {
     // later rendering to canvas
 
     // Get all the <symbol>s
-    let symbolEls = SVGStagingEl.querySelectorAll('symbol')
+    const symbolEls = SVGStagingEl.querySelectorAll('symbol')
 
-    for (let svg of symbolEls) {
+    for (const svg of symbolEls) {
       // Skip icons, we don't need to cache these
       if (svg.id.indexOf('icon-') === 0) continue
 
@@ -65,9 +65,9 @@ async function loadImage (url) {
 
     // Captures anything with its own viewbox, whether that's an svg file
     // or symbol elements within a svg.
-    let svgEls = SVGStagingEl.querySelectorAll('svg[viewBox]')
+    const svgEls = SVGStagingEl.querySelectorAll('svg[viewBox]')
 
-    for (let svg of svgEls) {
+    for (const svg of svgEls) {
       // Right now none of these have ids, use the url
       const id = url
 
diff --git a/assets/scripts/dialogs/About/Credits.jsx b/assets/scripts/dialogs/About/Credits.jsx
index 4944076798..7687062f55 100644
--- a/assets/scripts/dialogs/About/Credits.jsx
+++ b/assets/scripts/dialogs/About/Credits.jsx
@@ -33,24 +33,24 @@ function alphabetizeNames (a, b) {
 // because right now we don't have a way to fall back when a label is untranslated.
 // We can remove this once this has been built into our localization infrastructure.
 const UNTRANSLATED_LABELS = {
-  'advisors': 'Advisors',
+  advisors: 'Advisors',
   'additional-illustrations': 'Additional illustrations',
   'additional-code': 'Additional code',
   'additional-contributors': 'Additional contributors',
   'special-thanks': 'Special thanks to',
-  'ar': 'Arabic',
-  'de': 'German',
-  'en': 'English',
-  'es': 'Spanish',
+  ar: 'Arabic',
+  de: 'German',
+  en: 'English',
+  es: 'Spanish',
   'es-mx': 'Spanish (Mexico)',
-  'fi': 'Finnish',
-  'fr': 'French',
-  'ja': 'Japanese',
-  'pl': 'Polish',
+  fi: 'Finnish',
+  fr: 'French',
+  ja: 'Japanese',
+  pl: 'Polish',
   'pt-br': 'Portuguese (Brazil)',
-  'ru': 'Russian',
-  'sv': 'Swedish',
-  'zh': 'Chinese'
+  ru: 'Russian',
+  sv: 'Swedish',
+  zh: 'Chinese'
 }
 
 function Credits (props) {
diff --git a/assets/scripts/dialogs/AnalyticsDialog.jsx b/assets/scripts/dialogs/AnalyticsDialog.jsx
index 99633afdac..05561647e0 100644
--- a/assets/scripts/dialogs/AnalyticsDialog.jsx
+++ b/assets/scripts/dialogs/AnalyticsDialog.jsx
@@ -17,12 +17,12 @@ import './AnalyticsDialog.scss'
 const NO_CAPACITY = { average: 0, potential: 0 }
 
 const CAPACITIES = {
-  'sidewalk': { average: 19000, potential: 19000 },
+  sidewalk: { average: 19000, potential: 19000 },
   'drive-lane': { average: 1500, potential: 2000 },
   'bike-lane': { average: 14000, potential: 14000 },
-  'scooter': { average: 14000, potential: 14000 },
+  scooter: { average: 14000, potential: 14000 },
   'light-rail': { average: 18000, potential: 20000 },
-  'streetcar': { average: 18000, potential: 20000 },
+  streetcar: { average: 18000, potential: 20000 },
   'bus-lane': { average: 5000, potential: 8000 }
 }
 
diff --git a/assets/scripts/dialogs/NewsletterDialog.jsx b/assets/scripts/dialogs/NewsletterDialog.jsx
index cedb939783..11e249b83d 100644
--- a/assets/scripts/dialogs/NewsletterDialog.jsx
+++ b/assets/scripts/dialogs/NewsletterDialog.jsx
@@ -11,7 +11,7 @@ const NewsletterDialog = (props) => {
   const closeDialogFunc = useRef(() => {})
   const subscribeButton = useRef(null)
   useEffect(() => {
-    let handler = closeDialogFunc.current
+    const handler = closeDialogFunc.current
     subscribeButton.current = document.querySelector('#mc-embedded-subscribe')
     if (subscribeButton.current) {
       subscribeButton.current.addEventListener('click', handler)
diff --git a/assets/scripts/gallery/fetch_data.js b/assets/scripts/gallery/fetch_data.js
index 95e1862d4d..5cb4b5249d 100644
--- a/assets/scripts/gallery/fetch_data.js
+++ b/assets/scripts/gallery/fetch_data.js
@@ -13,7 +13,7 @@ export function fetchGalleryData () {
   if (galleryUserId) {
     const url = API_URL + 'v1/users/' + galleryUserId + '/streets'
     const options = {
-      headers: { 'Authorization': getAuthHeader() }
+      headers: { Authorization: getAuthHeader() }
     }
 
     window.fetch(url, options)
diff --git a/assets/scripts/gallery/fetch_street.js b/assets/scripts/gallery/fetch_street.js
index 37a2b98a21..4b231c2942 100644
--- a/assets/scripts/gallery/fetch_street.js
+++ b/assets/scripts/gallery/fetch_street.js
@@ -21,7 +21,7 @@ export function fetchGalleryStreet (streetId) {
 
   const url = API_URL + 'v1/streets/' + streetId
   const options = {
-    headers: { 'Authorization': getAuthHeader() }
+    headers: { Authorization: getAuthHeader() }
   }
 
   window.fetch(url, options)
diff --git a/assets/scripts/gallery/thumbnail.js b/assets/scripts/gallery/thumbnail.js
index 03174eda50..1b9b9b886b 100644
--- a/assets/scripts/gallery/thumbnail.js
+++ b/assets/scripts/gallery/thumbnail.js
@@ -139,7 +139,7 @@ function drawBackgroundGradient (ctx, dpi, width, height, backgroundGradient) {
   // Make color stops
   const stops = makeCanvasGradientStopArray(backgroundGradient)
   for (let i = 0; i < stops.length; i++) {
-    const [ color, stop ] = stops[i]
+    const [color, stop] = stops[i]
     gradient.addColorStop(stop, color)
   }
 
@@ -235,7 +235,7 @@ export function drawStreetThumbnail (ctx, street, thumbnailWidth, thumbnailHeigh
 
   // Determine how wide the street is
   let occupiedWidth = 0
-  for (let segment of street.segments) {
+  for (const segment of street.segments) {
     occupiedWidth += segment.width
   }
 
@@ -325,7 +325,7 @@ export function drawStreetThumbnail (ctx, street, thumbnailWidth, thumbnailHeigh
 
   // Collect z-indexes
   const zIndexes = []
-  for (let segment of street.segments) {
+  for (const segment of street.segments) {
     const segmentInfo = getSegmentInfo(segment.type)
 
     if (zIndexes.indexOf(segmentInfo.zIndex) === -1) {
@@ -334,10 +334,10 @@ export function drawStreetThumbnail (ctx, street, thumbnailWidth, thumbnailHeigh
   }
 
   // Render objects at each z-index level
-  for (let zIndex of zIndexes) {
+  for (const zIndex of zIndexes) {
     let offsetLeft = originalOffsetLeft
 
-    for (let segment of street.segments) {
+    for (const segment of street.segments) {
       const segmentInfo = getSegmentInfo(segment.type)
 
       if (segmentInfo.zIndex === zIndex) {
@@ -373,7 +373,7 @@ export function drawStreetThumbnail (ctx, street, thumbnailWidth, thumbnailHeigh
     ctx.textAlign = 'center'
     ctx.textBaseline = 'top'
 
-    for (let i in street.segments) {
+    for (const i in street.segments) {
       const segment = street.segments[i]
       const availableWidth = segment.width * TILE_SIZE * multiplier
 
diff --git a/assets/scripts/info_bubble/DescriptionPanel.jsx b/assets/scripts/info_bubble/DescriptionPanel.jsx
index 53b600c716..83c747023d 100644
--- a/assets/scripts/info_bubble/DescriptionPanel.jsx
+++ b/assets/scripts/info_bubble/DescriptionPanel.jsx
@@ -75,7 +75,7 @@ export default class DescriptionPanel extends React.Component {
   retargetAnchors = () => {
     if (!this.text) return
     const links = this.text.querySelectorAll('a')
-    for (let link of links) {
+    for (const link of links) {
       link.target = '_blank'
       link.rel = 'noopener noreferrer'
     }
diff --git a/assets/scripts/info_bubble/EditableLabel.jsx b/assets/scripts/info_bubble/EditableLabel.jsx
index 2afaf6b1f5..6b88a7bc85 100644
--- a/assets/scripts/info_bubble/EditableLabel.jsx
+++ b/assets/scripts/info_bubble/EditableLabel.jsx
@@ -51,7 +51,7 @@ EditableLabel.propTypes = {
   segment: PropTypes.object,
   position: PropTypes.oneOfType([
     PropTypes.number,
-    PropTypes.oneOf([ 'left', 'right' ])
+    PropTypes.oneOf(['left', 'right'])
   ]),
 
   // Provided by Redux mapStateToProps
diff --git a/assets/scripts/info_bubble/Variants.jsx b/assets/scripts/info_bubble/Variants.jsx
index 0f24582138..0b0c72ad0d 100644
--- a/assets/scripts/info_bubble/Variants.jsx
+++ b/assets/scripts/info_bubble/Variants.jsx
@@ -155,7 +155,7 @@ export class Variants extends React.Component {
         let first = true
 
         // Each segment has some allowed variant sets (e.g. "direction")
-        for (let variant in this.state.variantSets) {
+        for (const variant in this.state.variantSets) {
           const set = this.state.variantSets[variant]
 
           // New row for each variant set
@@ -171,7 +171,7 @@ export class Variants extends React.Component {
           // each of the selections are and data for building an icon.
           // Different segments may refer to the same variant set
           // ("direction" is a good example of this)
-          for (let selection in VARIANT_ICONS[set]) {
+          for (const selection in VARIANT_ICONS[set]) {
             const el = this.renderButton(set, selection)
 
             variantEls.push(el)
diff --git a/assets/scripts/info_bubble/__tests__/Variants.test.js b/assets/scripts/info_bubble/__tests__/Variants.test.js
index f8b048beaa..0cf15b486c 100644
--- a/assets/scripts/info_bubble/__tests__/Variants.test.js
+++ b/assets/scripts/info_bubble/__tests__/Variants.test.js
@@ -102,7 +102,7 @@ describe('Variants', () => {
 
     const type = INFO_BUBBLE_TYPE_SEGMENT
     const streetSegment = { variantString: 'inbound|regular', segmentType: 'streetcar' }
-    const flags = { 'flag': { value: 't' } }
+    const flags = { flag: { value: 't' } }
 
     it('renders with flag correctly', () => {
       const wrapper = shallow(<Variants {...requiredProps} type={type} position={0} variant={streetSegment.variantString} segmentType={streetSegment.segmentType} flags={flags} />)
diff --git a/assets/scripts/info_bubble/__tests__/Warnings.test.js b/assets/scripts/info_bubble/__tests__/Warnings.test.js
index 0f5696b2dd..c75e76ef77 100644
--- a/assets/scripts/info_bubble/__tests__/Warnings.test.js
+++ b/assets/scripts/info_bubble/__tests__/Warnings.test.js
@@ -14,7 +14,7 @@ describe('Warnings', () => {
 
   it('renders warning 1', () => {
     const segment = {
-      warnings: [ null, true ]
+      warnings: [null, true]
     }
     const wrapper = shallow(<Warnings segment={segment} />)
     expect(wrapper).toMatchSnapshot()
@@ -22,7 +22,7 @@ describe('Warnings', () => {
 
   it('renders warning 2', () => {
     const segment = {
-      warnings: [ null, false, true, false ]
+      warnings: [null, false, true, false]
     }
     const wrapper = shallow(<Warnings segment={segment} />)
     expect(wrapper).toMatchSnapshot()
@@ -30,7 +30,7 @@ describe('Warnings', () => {
 
   it('renders warning 3', () => {
     const segment = {
-      warnings: [ null, false, false, true ]
+      warnings: [null, false, false, true]
     }
     const wrapper = shallow(<Warnings segment={segment} />)
     expect(wrapper).toMatchSnapshot()
@@ -38,7 +38,7 @@ describe('Warnings', () => {
 
   it('renders two warnings', () => {
     const segment = {
-      warnings: [ null, true, false, true ]
+      warnings: [null, true, false, true]
     }
     const wrapper = shallow(<Warnings segment={segment} />)
     expect(wrapper).toMatchSnapshot()
@@ -46,7 +46,7 @@ describe('Warnings', () => {
 
   it('renders three warnings', () => {
     const segment = {
-      warnings: [ null, true, true, true ]
+      warnings: [null, true, true, true]
     }
     const wrapper = shallow(<Warnings segment={segment} />)
     expect(wrapper).toMatchSnapshot()
@@ -54,7 +54,7 @@ describe('Warnings', () => {
 
   it('renders no warnings', () => {
     const segment = {
-      warnings: [ null, false, false, false ]
+      warnings: [null, false, false, false]
     }
     const wrapper = shallow(<Warnings segment={segment} />)
     expect(wrapper).toMatchSnapshot()
diff --git a/assets/scripts/segments/Building.jsx b/assets/scripts/segments/Building.jsx
index 5746953f64..9ad832d366 100644
--- a/assets/scripts/segments/Building.jsx
+++ b/assets/scripts/segments/Building.jsx
@@ -164,7 +164,7 @@ class Building extends React.Component {
   // editCount, rightBuildingVariant (or leftBuildingVariant), and updatedAt
   shouldBuildingAnimate = (oldStreet, newStreet) => {
     let userUpdated = true
-    for (let key in newStreet) {
+    for (const key in newStreet) {
       if (oldStreet[key] !== newStreet[key]) {
         userUpdated = ['editCount', this.state.variant, 'updatedAt'].includes(key)
         if (!userUpdated) return false
diff --git a/assets/scripts/segments/__tests__/segment-dict.test.js b/assets/scripts/segments/__tests__/segment-dict.test.js
index 996d0b3161..479a03c934 100644
--- a/assets/scripts/segments/__tests__/segment-dict.test.js
+++ b/assets/scripts/segments/__tests__/segment-dict.test.js
@@ -41,21 +41,21 @@ describe('getSegmentComponentInfo()', () => {
 
 describe('applySegmentInfoOverridesAndRules()', () => {
   it('returns rules and information for a segment type and variant', () => {
-    const segmentRules = { 'minWidth': 0, 'maxWidth': 2 }
+    const segmentRules = { minWidth: 0, maxWidth: 2 }
     const details = {
-      'name': 'Bar',
-      'nameKey': 'bar',
-      'rules': {
-        'minWidth': 1
+      name: 'Bar',
+      nameKey: 'bar',
+      rules: {
+        minWidth: 1
       }
     }
 
     const variantInfo = applySegmentInfoOverridesAndRules(details, segmentRules)
     expect(variantInfo).toEqual({
-      'name': 'Bar',
-      'nameKey': 'bar',
-      'minWidth': 1,
-      'maxWidth': 2
+      name: 'Bar',
+      nameKey: 'bar',
+      minWidth: 1,
+      maxWidth: 2
     })
   })
 })
diff --git a/assets/scripts/segments/__tests__/variant_utils.test.js b/assets/scripts/segments/__tests__/variant_utils.test.js
index 7eb1e47f54..e6d3a08ad8 100644
--- a/assets/scripts/segments/__tests__/variant_utils.test.js
+++ b/assets/scripts/segments/__tests__/variant_utils.test.js
@@ -4,7 +4,7 @@ import { getVariantArray, getVariantString } from '../variant_utils'
 describe('getVariantArray', () => {
   it('returns an object', () => {
     const result = getVariantArray('streetcar', 'inbound|regular')
-    expect(result).toEqual({ 'direction': 'inbound', 'public-transit-asphalt': 'regular' })
+    expect(result).toEqual({ direction: 'inbound', 'public-transit-asphalt': 'regular' })
   })
 
   it('returns an empty object if the segment is not found', () => {
@@ -15,7 +15,7 @@ describe('getVariantArray', () => {
 
 describe('getVariantString', () => {
   it('returns a string', () => {
-    const obj = { 'direction': 'inbound', 'public-transit-asphalt': 'regular' }
+    const obj = { direction: 'inbound', 'public-transit-asphalt': 'regular' }
     const result = getVariantString(obj)
     expect(result).toEqual('inbound|regular')
   })
diff --git a/assets/scripts/segments/buildings.js b/assets/scripts/segments/buildings.js
index e8870d7f5c..13c40e090b 100644
--- a/assets/scripts/segments/buildings.js
+++ b/assets/scripts/segments/buildings.js
@@ -38,14 +38,14 @@ export const GROUND_BASELINE_HEIGHT = 44
  * overhangWidth    (number) in ??, amount to overhang the sidewalk (adjusts OVERHANG_WIDTH)
  */
 export const BUILDINGS = {
-  'grass': {
+  grass: {
     id: 'grass',
     label: 'Grass',
     spriteId: 'buildings--grass',
     hasFloors: false,
     sameOnBothSides: true
   },
-  'fence': {
+  fence: {
     id: 'fence',
     label: 'Empty lot',
     spriteId: 'buildings--fenced-lot',
@@ -58,7 +58,7 @@ export const BUILDINGS = {
     hasFloors: false,
     repeatHalf: true
   },
-  'waterfront': {
+  waterfront: {
     id: 'waterfront',
     label: 'Waterfront',
     spriteId: 'buildings--waterfront',
@@ -66,7 +66,7 @@ export const BUILDINGS = {
     alignAtBaseline: true,
     repeatHalf: true
   },
-  'residential': {
+  residential: {
     id: 'residential',
     label: 'Home',
     spriteId: 'buildings--residential',
@@ -76,7 +76,7 @@ export const BUILDINGS = {
     roofHeight: 6,
     mainFloorHeight: 24.5
   },
-  'narrow': {
+  narrow: {
     id: 'narrow',
     label: 'Building',
     spriteId: 'buildings--apartments-narrow',
@@ -87,7 +87,7 @@ export const BUILDINGS = {
     mainFloorHeight: 14,
     overhangWidth: 16
   },
-  'wide': {
+  wide: {
     id: 'wide',
     label: 'Building',
     spriteId: 'buildings--apartments-wide',
diff --git a/assets/scripts/segments/default.js b/assets/scripts/segments/default.js
index 8894264458..93f005ff28 100644
--- a/assets/scripts/segments/default.js
+++ b/assets/scripts/segments/default.js
@@ -1,33 +1,33 @@
 export const DEFAULT_SEGMENTS = {
-  'false': [ // Right-hand traffic
+  false: [ // Right-hand traffic
     { type: 'sidewalk', variant: { 'sidewalk-density': 'dense' }, width: 6 },
     { type: 'sidewalk-tree', variant: { 'tree-type': 'big' }, width: 2 },
-    { type: 'transit-shelter', variant: { 'orientation': 'left', 'transit-shelter-elevation': 'street-level' }, width: 9 },
+    { type: 'transit-shelter', variant: { orientation: 'left', 'transit-shelter-elevation': 'street-level' }, width: 9 },
     { type: 'sidewalk-lamp', variant: { 'lamp-orientation': 'right', 'lamp-type': 'modern' }, width: 2 },
-    { type: 'bus-lane', variant: { 'direction': 'inbound', 'bus-asphalt': 'shared' }, width: 12 },
-    { type: 'drive-lane', variant: { 'direction': 'inbound', 'car-type': 'car' }, width: 9 },
+    { type: 'bus-lane', variant: { direction: 'inbound', 'bus-asphalt': 'shared' }, width: 12 },
+    { type: 'drive-lane', variant: { direction: 'inbound', 'car-type': 'car' }, width: 9 },
     { type: 'divider', variant: { 'divider-type': 'bush' }, width: 3 },
-    { type: 'turn-lane', variant: { 'direction': 'outbound', 'turn-lane-orientation': 'left-straight' }, width: 10 },
+    { type: 'turn-lane', variant: { direction: 'outbound', 'turn-lane-orientation': 'left-straight' }, width: 10 },
     { type: 'parking-lane', variant: { 'parking-lane-direction': 'outbound', 'parking-lane-orientation': 'right' }, width: 7 },
     { type: 'divider', variant: { 'divider-type': 'planter-box' }, width: 4 },
-    { type: 'bike-lane', variant: { 'direction': 'outbound', 'bike-asphalt': 'green' }, width: 6 },
+    { type: 'bike-lane', variant: { direction: 'outbound', 'bike-asphalt': 'green' }, width: 6 },
     { type: 'sidewalk-lamp', variant: { 'lamp-orientation': 'left', 'lamp-type': 'modern' }, width: 2 },
     { type: 'sidewalk-tree', variant: { 'tree-type': 'big' }, width: 2 },
     { type: 'sidewalk', variant: { 'sidewalk-density': 'normal' }, width: 6 }
   ],
-  'true': [ // Left-hand traffic
+  true: [ // Left-hand traffic
     { type: 'sidewalk', variant: { 'sidewalk-density': 'normal' }, width: 6 },
     { type: 'sidewalk-tree', variant: { 'tree-type': 'big' }, width: 2 },
     { type: 'sidewalk-lamp', variant: { 'lamp-orientation': 'right', 'lamp-type': 'modern' }, width: 2 },
-    { type: 'bike-lane', variant: { 'direction': 'outbound', 'bike-asphalt': 'green' }, width: 6 },
+    { type: 'bike-lane', variant: { direction: 'outbound', 'bike-asphalt': 'green' }, width: 6 },
     { type: 'divider', variant: { 'divider-type': 'planter-box' }, width: 4 },
     { type: 'parking-lane', variant: { 'parking-lane-direction': 'outbound', 'parking-lane-orientation': 'left' }, width: 7 },
-    { type: 'turn-lane', variant: { 'direction': 'outbound', 'turn-lane-orientation': 'right-straight' }, width: 10 },
+    { type: 'turn-lane', variant: { direction: 'outbound', 'turn-lane-orientation': 'right-straight' }, width: 10 },
     { type: 'divider', variant: { 'divider-type': 'bush' }, width: 3 },
-    { type: 'drive-lane', variant: { 'direction': 'inbound', 'car-type': 'car' }, width: 9 },
-    { type: 'bus-lane', variant: { 'direction': 'inbound', 'bus-asphalt': 'shared' }, width: 12 },
+    { type: 'drive-lane', variant: { direction: 'inbound', 'car-type': 'car' }, width: 9 },
+    { type: 'bus-lane', variant: { direction: 'inbound', 'bus-asphalt': 'shared' }, width: 12 },
     { type: 'sidewalk-lamp', variant: { 'lamp-orientation': 'left', 'lamp-type': 'modern' }, width: 2 },
-    { type: 'transit-shelter', variant: { 'orientation': 'right', 'transit-shelter-elevation': 'street-level' }, width: 9 },
+    { type: 'transit-shelter', variant: { orientation: 'right', 'transit-shelter-elevation': 'street-level' }, width: 9 },
     { type: 'sidewalk-tree', variant: { 'tree-type': 'big' }, width: 2 },
     { type: 'sidewalk', variant: { 'sidewalk-density': 'dense' }, width: 6 }
   ]
diff --git a/assets/scripts/segments/info.js b/assets/scripts/segments/info.js
index 053a01abe9..5fd188ff53 100644
--- a/assets/scripts/segments/info.js
+++ b/assets/scripts/segments/info.js
@@ -101,8 +101,7 @@ const SPRITE_DEFS = {
   'lamps--lamp-traditional-left': { id: 'lamps--lamp-traditional-left', offsetX: -36 },
   'lamps--pride-banner-right': { id: 'lamps--pride-banner-right', offsetX: -60, originY: -423 },
   'lamps--pride-banner-left': { id: 'lamps--pride-banner-left', offsetX: -60, originY: -423 },
-
-  'missing': { id: 'missing' },
+  missing: { id: 'missing' },
 
   'people--people-01': { id: 'people--people-01', originY: 10 },
   'people--people-02': { id: 'people--people-02', originY: 10 },
diff --git a/assets/scripts/segments/people.js b/assets/scripts/segments/people.js
index 81089c6f20..1d7520f6f8 100644
--- a/assets/scripts/segments/people.js
+++ b/assets/scripts/segments/people.js
@@ -9,7 +9,7 @@ import PEOPLE from './people.json'
 
 // TODO magic number - randSeed defaults to 35: why?
 export function drawProgrammaticPeople (ctx, width, offsetLeft, groundLevel, randSeed = 35, multiplier, variantString, dpi) {
-  let people = []
+  const people = []
   let peopleWidth = 0
 
   // Depending on the type of sidewalk, we would have different densities of people.
@@ -73,7 +73,7 @@ export function drawProgrammaticPeople (ctx, width, offsetLeft, groundLevel, ran
     startLeft += (firstPersonCorrection + lastPersonCorrection) / 2
   }
 
-  for (let person of people) {
+  for (const person of people) {
     // Change person.id to 1-index instead of 0-index,
     // convert to string & zero-pad to two digits
     const type = ('0' + (person.id + 1).toString()).slice(-2)
diff --git a/assets/scripts/segments/segment-dict.js b/assets/scripts/segments/segment-dict.js
index c6eacc50d6..aac1752bf3 100644
--- a/assets/scripts/segments/segment-dict.js
+++ b/assets/scripts/segments/segment-dict.js
@@ -89,7 +89,7 @@ function getComponentGroupVariants (groupItems, componentGroupInfo) {
         // variantInfo - graphics definition for specific variants defined by group item
         let variantInfo = groupItemVariants[variantName] || SEGMENT_UNKNOWN_VARIANT
 
-        const variantKeys = Array.isArray(variantKey) ? variantKey : [ variantKey ]
+        const variantKeys = Array.isArray(variantKey) ? variantKey : [variantKey]
         variantKeys.forEach((key) => {
           variantInfo = (variantInfo && variantInfo[key]) || SEGMENT_UNKNOWN_VARIANT
         })
@@ -183,7 +183,7 @@ const gatherAnalytics = (componentArray, mapSection) => {
 // serves up complete analytics data the a set of component variants that make up a segment
 export function getSegmentAnalytics ({ objects, lanes, vehicles, markings }) {
   // 1) Loop through each component group that makes up the segment.
-  let analytics = {}
+  const analytics = {}
   analytics.vehicles = gatherAnalytics(vehicles, 'vehicles')
   analytics.objects = gatherAnalytics(objects, 'objects')
   analytics.lanes = gatherAnalytics(lanes, 'lanes')
@@ -203,7 +203,7 @@ export function getSegmentAnalytics ({ objects, lanes, vehicles, markings }) {
 export function getSegmentSprites (components) {
   // 1) Loop through each component group that makes up the segment.
   const sprites = Object.entries(components).reduce((graphicsArray, componentGroup) => {
-    const [ group, groupItems ] = componentGroup
+    const [group, groupItems] = componentGroup
 
     // 2) For each component group, look up the segment information for every item that makes up the component group.
     // componentGroupInfo = [ { characteristics, rules, variants } ]
diff --git a/assets/scripts/segments/variant_utils.js b/assets/scripts/segments/variant_utils.js
index a1d5848b3d..f08d0ce46d 100644
--- a/assets/scripts/segments/variant_utils.js
+++ b/assets/scripts/segments/variant_utils.js
@@ -23,7 +23,7 @@ export function getVariantArray (segmentType, variantString) {
   const segment = getSegmentInfo(segmentType)
 
   if (segment && segment.variants) {
-    for (let i in segment.variants) {
+    for (const i in segment.variants) {
       const variantName = segment.variants[i]
       variantArray[variantName] = variantSplit[i]
     }
diff --git a/assets/scripts/store/index.js b/assets/scripts/store/index.js
index 8a4abe4553..604691d85b 100644
--- a/assets/scripts/store/index.js
+++ b/assets/scripts/store/index.js
@@ -25,14 +25,14 @@ export function observeStore (select, onChange) {
   let currentState
 
   function handleChange () {
-    let nextState = select(store.getState())
+    const nextState = select(store.getState())
     if (nextState !== currentState) {
       currentState = nextState
       onChange(currentState)
     }
   }
 
-  let unsubscribe = store.subscribe(handleChange)
+  const unsubscribe = store.subscribe(handleChange)
   // handleChange()
   return unsubscribe
 }
diff --git a/assets/scripts/store/reducers/__tests__/flags.test.js b/assets/scripts/store/reducers/__tests__/flags.test.js
index 32370179c2..6626928388 100644
--- a/assets/scripts/store/reducers/__tests__/flags.test.js
+++ b/assets/scripts/store/reducers/__tests__/flags.test.js
@@ -18,13 +18,13 @@ jest.mock('../../../../../app/data/flags', () => {
 describe('flags reducer', () => {
   it('should return the initial state', () => {
     expect(reducer(undefined, {})).toEqual({
-      'BAZ_QUX': {
-        'source': 'initial',
-        'value': true
+      BAZ_QUX: {
+        source: 'initial',
+        value: true
       },
-      'FOO_BAR': {
-        'source': 'initial',
-        'value': false
+      FOO_BAR: {
+        source: 'initial',
+        value: false
       }
     })
   })
@@ -32,13 +32,13 @@ describe('flags reducer', () => {
   it('should set a user-defined value', () => {
     const action = reducer(undefined, actions.setFeatureFlag('BAZ_QUX', false))
     const result = {
-      'BAZ_QUX': {
-        'source': 'session',
-        'value': false
+      BAZ_QUX: {
+        source: 'session',
+        value: false
       },
-      'FOO_BAR': {
-        'source': 'initial',
-        'value': false
+      FOO_BAR: {
+        source: 'initial',
+        value: false
       }
     }
     expect(action).toEqual(result)
diff --git a/assets/scripts/streets/EnvironmentEditor.jsx b/assets/scripts/streets/EnvironmentEditor.jsx
index 9f6dfeecab..dddf306fb7 100644
--- a/assets/scripts/streets/EnvironmentEditor.jsx
+++ b/assets/scripts/streets/EnvironmentEditor.jsx
@@ -33,7 +33,7 @@ class EnvironmentEditor extends Component {
 
   render () {
     const envs = getAllEnvirons()
-    const show = [ this.props.visible ]
+    const show = [this.props.visible]
 
     return (
       <Transition
diff --git a/assets/scripts/streets/__tests__/environs.test.js b/assets/scripts/streets/__tests__/environs.test.js
index 328265a0a5..ef693c8515 100644
--- a/assets/scripts/streets/__tests__/environs.test.js
+++ b/assets/scripts/streets/__tests__/environs.test.js
@@ -27,25 +27,25 @@ describe('environs helpers', () => {
     it('fills in all empty stops', () => {
       const result = makeCanvasGradientStopArray(MOCK_ENVIRONS.foo.backgroundGradient)
       expect(result).toEqual([
-        [ '#020b1a', 0.0 ],
-        [ '#3e5879', 0.14285714285714285 ],
-        [ '#9ba5ae', 0.2857142857142857 ],
-        [ '#dcb697', 0.42857142857142855 ],
-        [ '#fc7001', 0.5714285714285714 ],
-        [ '#dd723c', 0.7142857142857142 ],
-        [ '#ad4a28', 0.857142857142857 ],
-        [ '#040308', 1.0 ]
+        ['#020b1a', 0.0],
+        ['#3e5879', 0.14285714285714285],
+        ['#9ba5ae', 0.2857142857142857],
+        ['#dcb697', 0.42857142857142855],
+        ['#fc7001', 0.5714285714285714],
+        ['#dd723c', 0.7142857142857142],
+        ['#ad4a28', 0.857142857142857],
+        ['#040308', 1.0]
       ])
     })
 
     it('fills in empty stops between known stops', () => {
       const result = makeCanvasGradientStopArray(MOCK_ENVIRONS.bar.backgroundGradient)
       expect(result).toEqual([
-        [ '#020b1a', 0.0 ],
-        [ '#3e5879', 0.2 ],
-        [ '#9ba5ae', 0.4 ],
-        [ '#dcb697', 0.7 ],
-        [ '#fc7001', 1.0 ]
+        ['#020b1a', 0.0],
+        ['#3e5879', 0.2],
+        ['#9ba5ae', 0.4],
+        ['#dcb697', 0.7],
+        ['#fc7001', 1.0]
       ])
     })
   })
@@ -54,12 +54,12 @@ describe('environs helpers', () => {
     it('gets info for a single environs, with React-ready style object', () => {
       const result = getEnvirons('foo')
       expect(result).toEqual({
-        'id': 'foo',
-        'name': 'Foo',
-        'backgroundGradient': [ '#020b1a', '#3e5879', ['#9ba5ae'], ['#dcb697'], ['#fc7001'], ['#dd723c'], ['#ad4a28'], ['#040308'] ],
-        'cloudOpacity': 0.85,
-        'style': {
-          'background': 'linear-gradient(#020b1a, #3e5879, #9ba5ae, #dcb697, #fc7001, #dd723c, #ad4a28, #040308)'
+        id: 'foo',
+        name: 'Foo',
+        backgroundGradient: ['#020b1a', '#3e5879', ['#9ba5ae'], ['#dcb697'], ['#fc7001'], ['#dd723c'], ['#ad4a28'], ['#040308']],
+        cloudOpacity: 0.85,
+        style: {
+          background: 'linear-gradient(#020b1a, #3e5879, #9ba5ae, #dcb697, #fc7001, #dd723c, #ad4a28, #040308)'
         }
       })
     })
diff --git a/assets/scripts/streets/__tests__/width.test.js b/assets/scripts/streets/__tests__/width.test.js
index 6007d37b91..849f914e2d 100644
--- a/assets/scripts/streets/__tests__/width.test.js
+++ b/assets/scripts/streets/__tests__/width.test.js
@@ -43,9 +43,9 @@ describe('recalculateWidth', () => {
       occupiedWidth: 50,
       remainingWidth: 0,
       segments: [
-        { width: 10, warnings: [ undefined, false, false, false ] },
-        { width: 20, warnings: [ undefined, false, false, false ] },
-        { width: 20, warnings: [ undefined, false, false, false ] }
+        { width: 10, warnings: [undefined, false, false, false] },
+        { width: 20, warnings: [undefined, false, false, false] },
+        { width: 20, warnings: [undefined, false, false, false] }
       ]
     })
   })
@@ -62,8 +62,8 @@ describe('recalculateWidth', () => {
       occupiedWidth: 40,
       remainingWidth: 10,
       segments: [
-        { width: 10, warnings: [ undefined, false, false, false ] },
-        { width: 30, warnings: [ undefined, false, false, false ] }
+        { width: 10, warnings: [undefined, false, false, false] },
+        { width: 30, warnings: [undefined, false, false, false] }
       ]
     })
   })
@@ -81,9 +81,9 @@ describe('recalculateWidth', () => {
       occupiedWidth: 70,
       remainingWidth: -20,
       segments: [
-        { width: 30, warnings: [ undefined, true, false, false ] },
-        { width: 10, warnings: [ undefined, false, false, false ] },
-        { width: 30, warnings: [ undefined, true, false, false ] }
+        { width: 30, warnings: [undefined, true, false, false] },
+        { width: 10, warnings: [undefined, false, false, false] },
+        { width: 30, warnings: [undefined, true, false, false] }
       ]
     })
   })
@@ -101,9 +101,9 @@ describe('recalculateWidth', () => {
       occupiedWidth: 70,
       remainingWidth: -20,
       segments: [
-        { width: 30, warnings: [ undefined, true, false, false ] },
-        { width: 10, warnings: [ undefined, false, false, false ] },
-        { width: 30, warnings: [ undefined, true, false, false ] }
+        { width: 30, warnings: [undefined, true, false, false] },
+        { width: 10, warnings: [undefined, false, false, false] },
+        { width: 30, warnings: [undefined, true, false, false] }
       ]
     })
   })
@@ -121,9 +121,9 @@ describe('recalculateWidth', () => {
       occupiedWidth: 30,
       remainingWidth: 20,
       segments: [
-        { width: 2, type: 'sidewalk', variantString: 'normal', warnings: [ undefined, false, true, false ] },
-        { width: 10, type: 'divider', variantString: 'bush', warnings: [ undefined, false, false, false ] },
-        { width: 18, type: 'parking-lane', variantString: 'inbound|left', warnings: [ undefined, false, false, true ] }
+        { width: 2, type: 'sidewalk', variantString: 'normal', warnings: [undefined, false, true, false] },
+        { width: 10, type: 'divider', variantString: 'bush', warnings: [undefined, false, false, false] },
+        { width: 18, type: 'parking-lane', variantString: 'inbound|left', warnings: [undefined, false, false, true] }
       ]
     })
   })
diff --git a/assets/scripts/streets/data_model.js b/assets/scripts/streets/data_model.js
index b329daa135..cda8e0ed14 100644
--- a/assets/scripts/streets/data_model.js
+++ b/assets/scripts/streets/data_model.js
@@ -88,7 +88,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 4:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk-lamp') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -98,7 +98,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 5:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'streetcar') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -108,7 +108,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 6:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'bus-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -122,7 +122,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 7:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'bike-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -132,7 +132,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 8:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'drive-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -142,7 +142,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 9:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -152,7 +152,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 10:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'planting-strip') {
           segment.type = 'divider'
@@ -167,7 +167,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 11:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'divider') {
           if (segment.variantString === 'small-tree') {
@@ -181,7 +181,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 12:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk-bike-rack') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -191,7 +191,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 13:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk-wayfinding') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -201,7 +201,7 @@ function incrementSchemaVersion (street) {
       }
       break
     case 14:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'sidewalk') {
           segment.randSeed = 35
@@ -212,7 +212,7 @@ function incrementSchemaVersion (street) {
       store.dispatch(resetUndoStack())
       break
     case 16:
-      for (let i in street.segments) {
+      for (const i in street.segments) {
         segment = street.segments[i]
         if (segment.type === 'bike-lane') {
           variant = getVariantArray(segment.type, segment.variantString)
@@ -346,9 +346,9 @@ export function trimStreetData (street, saveSegmentId = true) {
 
 function fillDefaultSegments (units) {
   const segments = []
-  let leftHandTraffic = getLeftHandTraffic()
+  const leftHandTraffic = getLeftHandTraffic()
 
-  for (let i in DEFAULT_SEGMENTS[leftHandTraffic]) {
+  for (const i in DEFAULT_SEGMENTS[leftHandTraffic]) {
     const segment = DEFAULT_SEGMENTS[leftHandTraffic][i]
     segment.warnings = []
     segment.variantString = getVariantString(segment.variant)
diff --git a/assets/scripts/streets/environs.js b/assets/scripts/streets/environs.js
index e97aa76b18..1c6d845a53 100644
--- a/assets/scripts/streets/environs.js
+++ b/assets/scripts/streets/environs.js
@@ -19,7 +19,7 @@ export function makeCSSGradientDeclaration (array) {
 
     // If the value is an array, turn it into a string
     if (Array.isArray(item)) {
-      const [ color, position ] = item
+      const [color, position] = item
 
       // Position is recorded as a value between 0 and 1, but is optional
       let percentage
@@ -165,8 +165,8 @@ export function getEnvirons (id) {
  */
 export function getAllEnvirons () {
   return Object.entries(ENVIRONS)
-    .filter(([ key, value ]) => value.enabled !== false)
-    .map(([ key, value ]) => getEnvirons(key))
+    .filter(([key, value]) => value.enabled !== false)
+    .map(([key, value]) => getEnvirons(key))
 }
 
 /**
diff --git a/assets/scripts/streets/image.js b/assets/scripts/streets/image.js
index 801f32150d..7db0069d4a 100644
--- a/assets/scripts/streets/image.js
+++ b/assets/scripts/streets/image.js
@@ -123,7 +123,7 @@ export async function saveStreetThumbnail (street, event) {
       method: 'POST',
       body: JSON.stringify(details),
       headers: {
-        'Authorization': getAuthHeader(),
+        Authorization: getAuthHeader(),
         'Content-Type': 'text/plain'
       }
     }
@@ -153,7 +153,7 @@ export async function deleteStreetThumbnail (streetId) {
   const options = {
     method: 'DELETE',
     headers: {
-      'Authorization': getAuthHeader(),
+      Authorization: getAuthHeader(),
       'Content-Type': 'text/plain'
     }
   }
diff --git a/assets/scripts/streets/remix.js b/assets/scripts/streets/remix.js
index 5122f4698a..ac75c0e1c8 100644
--- a/assets/scripts/streets/remix.js
+++ b/assets/scripts/streets/remix.js
@@ -84,7 +84,7 @@ export function remixStreet () {
       method: 'POST',
       body: transmission,
       headers: {
-        'Authorization': getAuthHeader(),
+        Authorization: getAuthHeader(),
         'Content-Type': 'application/json'
       }
     }, receiveRemixedStreet
diff --git a/assets/scripts/streets/xhr.js b/assets/scripts/streets/xhr.js
index 55c33563f1..ecad32467b 100644
--- a/assets/scripts/streets/xhr.js
+++ b/assets/scripts/streets/xhr.js
@@ -96,7 +96,7 @@ export function createNewStreetOnServer () {
     method: 'POST',
     body: packServerStreetData(),
     headers: {
-      'Authorization': getAuthHeader(),
+      Authorization: getAuthHeader(),
       'Content-Type': 'application/json'
     }
   }
@@ -149,7 +149,7 @@ export function fetchStreetFromServer () {
 }
 
 function errorReceiveStreet (data) {
-  let mode = getMode()
+  const mode = getMode()
   if ((mode === MODES.CONTINUE) || (mode === MODES.USER_GALLERY) ||
     (mode === MODES.GLOBAL_GALLERY)) {
     goNewStreet()
@@ -184,7 +184,7 @@ export function saveStreetToServer (initial) {
     method: 'PUT',
     body: transmission,
     headers: {
-      'Authorization': getAuthHeader(),
+      Authorization: getAuthHeader(),
       'Content-Type': 'application/json'
     }
   }
@@ -410,7 +410,7 @@ export function fetchLastStreet () {
       // TODO const
       url: API_URL + 'v1/streets/' + getSettings().priorLastStreetId,
       method: 'GET',
-      headers: { 'Authorization': getAuthHeader() }
+      headers: { Authorization: getAuthHeader() }
     }, receiveLastStreet, cancelReceiveLastStreet
   )
 }
@@ -466,6 +466,6 @@ export function sendDeleteStreetToServer (id) {
   // TODO const url
   newNonblockingAjaxRequest(API_URL + 'v1/streets/' + id, {
     method: 'DELETE',
-    headers: { 'Authorization': getAuthHeader() }
+    headers: { Authorization: getAuthHeader() }
   }, false)
 }
diff --git a/assets/scripts/ui/Checkbox.jsx b/assets/scripts/ui/Checkbox.jsx
index 8b2ca50e14..f39526fa23 100644
--- a/assets/scripts/ui/Checkbox.jsx
+++ b/assets/scripts/ui/Checkbox.jsx
@@ -50,7 +50,7 @@ function Checkbox (props) {
   // This is a controlled component. The `useState` hook maintains
   // this component's internal state, and sets the initial state
   // based on the `checked` prop (which is `false` by default).
-  const [ isChecked, setChecked ] = useState(props.checked)
+  const [isChecked, setChecked] = useState(props.checked)
 
   // When the value is changed, we update the state, and we also call
   // any `onChange` handler that is provided by the parent via props.
diff --git a/assets/scripts/users/Avatar.jsx b/assets/scripts/users/Avatar.jsx
index c54f1c2603..38b7189f70 100644
--- a/assets/scripts/users/Avatar.jsx
+++ b/assets/scripts/users/Avatar.jsx
@@ -23,7 +23,7 @@ function Avatar (props) {
     if (!image) {
       fetchData()
     }
-  }, [ image, userId, rememberUserProfile ])
+  }, [image, userId, rememberUserProfile])
 
   return (
     <div className="avatar">
diff --git a/assets/scripts/users/authentication.js b/assets/scripts/users/authentication.js
index c00142b084..cf0113a426 100644
--- a/assets/scripts/users/authentication.js
+++ b/assets/scripts/users/authentication.js
@@ -133,7 +133,7 @@ export async function loadSignIn () {
 
 async function fetchSignInDetails (userId) {
   const options = {
-    headers: { 'Authorization': getAuthHeader() }
+    headers: { Authorization: getAuthHeader() }
   }
 
   try {
@@ -234,7 +234,7 @@ function sendSignOutToServer (quiet) {
   const signInData = getSignInData()
   const options = {
     method: 'DELETE',
-    headers: { 'Authorization': getAuthHeader() }
+    headers: { Authorization: getAuthHeader() }
   }
 
   // TODO const
@@ -264,7 +264,7 @@ function _signInLoaded () {
   let mode = getMode()
   if ((mode === MODES.CONTINUE) || (mode === MODES.JUST_SIGNED_IN) ||
     (mode === MODES.USER_GALLERY) || (mode === MODES.GLOBAL_GALLERY)) {
-    let settings = getSettings()
+    const settings = getSettings()
     if (settings.lastStreetId) {
       street.creatorId = settings.lastStreetCreatorId
       street.id = settings.lastStreetId
diff --git a/assets/scripts/users/settings.js b/assets/scripts/users/settings.js
index 66514e5b06..098ad23443 100644
--- a/assets/scripts/users/settings.js
+++ b/assets/scripts/users/settings.js
@@ -38,7 +38,7 @@ function mergeSettings (serverSettings = {}, localSettings = {}) {
 export function loadSettings () {
   let serverSettings = {}
   let localSettings = {}
-  let signInData = getSignInData()
+  const signInData = getSignInData()
 
   if (isSignedIn() && signInData.details) {
     serverSettings = signInData.details.data
@@ -111,7 +111,7 @@ export function saveSettingsToServer () {
     method: 'PUT',
     body: transmission,
     headers: {
-      'Authorization': getAuthHeader(),
+      Authorization: getAuthHeader(),
       'Content-Type': 'application/json'
     }
   }, true, null, errorSavingSettingsToServer)
diff --git a/assets/scripts/util/api.js b/assets/scripts/util/api.js
index bd04135d6f..c5b7f23abd 100644
--- a/assets/scripts/util/api.js
+++ b/assets/scripts/util/api.js
@@ -13,9 +13,10 @@ class APIClient {
       responseType: 'json'
     })
   }
+
     getStreet = async (streetId) => {
       const { data } = await this.client.get(`/streets/${streetId}`, {
-        headers: { 'Authorization': getAuthHeader() }
+        headers: { Authorization: getAuthHeader() }
       })
       return data
     };
diff --git a/assets/scripts/util/fetch_nonblocking.js b/assets/scripts/util/fetch_nonblocking.js
index ea8b802ec4..c494e75a42 100644
--- a/assets/scripts/util/fetch_nonblocking.js
+++ b/assets/scripts/util/fetch_nonblocking.js
@@ -9,7 +9,7 @@ import { showNoConnectionMessage } from '../store/actions/status'
 const NON_BLOCKING_AJAX_REQUEST_TIME = [10, 500, 1000, 5000, 10000]
 const NON_BLOCKING_AJAX_REQUEST_BACKOFF_RANGE = 60000
 
-let nonblockingAjaxRequests = []
+const nonblockingAjaxRequests = []
 let nonblockingAjaxRequestTimer = 0
 
 function scheduleNoConnectionMessage () {
@@ -170,7 +170,7 @@ function checkIfChangesSaved () {
   if (getSaveStreetIncomplete()) {
     showWarning = true
   } else {
-    for (let i in nonblockingAjaxRequests) {
+    for (const i in nonblockingAjaxRequests) {
       if (!nonblockingAjaxRequests[i].allowToClosePage) {
         showWarning = true
       }
diff --git a/assets/scripts/util/helpers.js b/assets/scripts/util/helpers.js
index ed27dceaf7..eda5099362 100644
--- a/assets/scripts/util/helpers.js
+++ b/assets/scripts/util/helpers.js
@@ -14,7 +14,7 @@ import slugify from 'slugify'
  *    from the top of the viewport.
  */
 export function getElAbsolutePos (el, includeScroll = false) {
-  let pos = [0, 0]
+  const pos = [0, 0]
 
   do {
     pos[0] += el.offsetLeft + (el.cssTransformLeft || 0)
@@ -46,7 +46,7 @@ export function normalizeSlug (slug) {
   slugify.extend({
     '|': null,
     '%': null,
-    '$': null
+    $: null
   })
 
   const slugified = slugify(slug, {
diff --git a/assets/scripts/util/width_units.js b/assets/scripts/util/width_units.js
index 79a2714af4..9b2443a4da 100644
--- a/assets/scripts/util/width_units.js
+++ b/assets/scripts/util/width_units.js
@@ -48,7 +48,7 @@ export function processWidthInput (widthInput, units) {
   widthInput = widthInput.replace(/ /g, '')
   widthInput = widthInput.replace(/,/g, '.')
 
-  for (let i in IMPERIAL_VULGAR_FRACTIONS) {
+  for (const i in IMPERIAL_VULGAR_FRACTIONS) {
     if (widthInput.indexOf(IMPERIAL_VULGAR_FRACTIONS[i]) !== -1) {
       widthInput = widthInput.replace(new RegExp(IMPERIAL_VULGAR_FRACTIONS[i]), i)
     }
@@ -227,7 +227,7 @@ function parseStringForUnits (widthInput, units) {
       multiplier = 1
     }
 
-    for (let i in WIDTH_INPUT_CONVERSION) {
+    for (const i in WIDTH_INPUT_CONVERSION) {
       if (widthInput.match(new RegExp('[\\d\\.]' + WIDTH_INPUT_CONVERSION[i].text + '$'))) {
         multiplier = WIDTH_INPUT_CONVERSION[i].multiplier
         break
diff --git a/bin/check_num_logins_per_user.js b/bin/check_num_logins_per_user.js
index 8ac57323b9..d2598702d9 100644
--- a/bin/check_num_logins_per_user.js
+++ b/bin/check_num_logins_per_user.js
@@ -13,4 +13,4 @@ var reducer = function (key, values) {
   return values.length // { _id: key, value: values.length }
 }
 
-printjson(db.streets.mapReduce(mapper, reducer, { out: { 'inline': 1 } }).results)
+printjson(db.streets.mapReduce(mapper, reducer, { out: { inline: 1 } }).results)
diff --git a/bin/compute_street_sizes.js b/bin/compute_street_sizes.js
index 8842185538..afbb915fae 100644
--- a/bin/compute_street_sizes.js
+++ b/bin/compute_street_sizes.js
@@ -25,18 +25,18 @@ var mapper = function () {
   emit(
     this._id,
     {
-      'creator_id': this.creator_id,
-      'namespaced_id': this.namespaced_id,
-      'undo_stack_length': ((this.data && this.data.undoStack) ? this.data.undoStack.length : 0),
-      'size_in_bytes': Object.bsonsize(this),
-      'updated_at': this.updated_at
+      creator_id: this.creator_id,
+      namespaced_id: this.namespaced_id,
+      undo_stack_length: ((this.data && this.data.undoStack) ? this.data.undoStack.length : 0),
+      size_in_bytes: Object.bsonsize(this),
+      updated_at: this.updated_at
     }
   )
 }
 
 var reducer = function (key, values) { return { _id: key, size: values } }
 
-var results = db.streets.mapReduce(mapper, reducer, { out: { 'inline': 1 } }).results
+var results = db.streets.mapReduce(mapper, reducer, { out: { inline: 1 } }).results
 
 results.forEach(function (result) {
   var creator = '-'
diff --git a/bin/download_translations.js b/bin/download_translations.js
index e310ad5602..328c37c01c 100644
--- a/bin/download_translations.js
+++ b/bin/download_translations.js
@@ -36,8 +36,8 @@ const downloadError = function (locale, resource, label, error) {
   console.error(chalk`{redBright Error:} {yellowBright ${label} (${locale})} · {magentaBright ${resource}} → {gray ${error}}`)
 }
 
-for (let r in resources) {
-  for (let l in languages) {
+for (const r in resources) {
+  for (const l in languages) {
     // Skip English
     if (languages[l].value === 'en') {
       continue
diff --git a/lib/transifex.js b/lib/transifex.js
index a2b13315f7..7865485eea 100644
--- a/lib/transifex.js
+++ b/lib/transifex.js
@@ -27,8 +27,8 @@ module.exports = async function getFromTransifex (locale, resource, token) {
     url: API_BASE_URI + resource + '/translation/' + locale + '?mode=onlytranslated',
     method: 'get',
     headers: {
-      'Authorization': 'Basic ' + authToken,
-      'Accept': 'application/json'
+      Authorization: 'Basic ' + authToken,
+      Accept: 'application/json'
     }
   })
 
diff --git a/lib/util.js b/lib/util.js
index 03702fff2b..b8d87198be 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -17,7 +17,7 @@ exports.parseLoginToken = function (req) {
 
   // Convert the auth string to an object
   const authObject = auth.reduce((accumulator, item) => {
-    const [ key, value ] = item.split('=')
+    const [key, value] = item.split('=')
     accumulator[key] = value.replace(/(^"|"$)/g, '')
     return accumulator
   }, {})
diff --git a/lib/variant.js b/lib/variant.js
index 6e43223483..b8b563cda2 100644
--- a/lib/variant.js
+++ b/lib/variant.js
@@ -44,7 +44,7 @@ exports.getVariantArray = function (segmentType, variantString) {
   const segment = getSegmentInfo(segmentType)
 
   if (segment && segment.variants) {
-    for (let i in segment.variants) {
+    for (const i in segment.variants) {
       const variantName = segment.variants[i]
       variantArray[variantName] = variantSplit[i]
     }
diff --git a/package-lock.json b/package-lock.json
index 18cbfc5e5f..c8615f1c6a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -3084,7 +3084,7 @@
     },
     "bluebird": {
       "version": "2.11.0",
-      "resolved": "https://registry.npmjs.org/bluebird/-/bluebird-2.11.0.tgz",
+      "resolved": "http://registry.npmjs.org/bluebird/-/bluebird-2.11.0.tgz",
       "integrity": "sha1-U0uQM8AiyVecVro7Plpcqvu2UOE="
     },
     "bn.js": {
@@ -4056,8 +4056,7 @@
     "console-control-strings": {
       "version": "1.1.0",
       "resolved": "https://registry.npmjs.org/console-control-strings/-/console-control-strings-1.1.0.tgz",
-      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4=",
-      "optional": true
+      "integrity": "sha1-PXz0Rk22RG6mRL9LOVB/mFEAjo4="
     },
     "constant-case": {
       "version": "1.1.2",
@@ -6061,9 +6060,9 @@
       }
     },
     "eslint-config-standard": {
-      "version": "12.0.0",
-      "resolved": "https://registry.npmjs.org/eslint-config-standard/-/eslint-config-standard-12.0.0.tgz",
-      "integrity": "sha512-COUz8FnXhqFitYj4DTqHzidjIL/t4mumGZto5c7DrBpvWoie+Sn3P4sLEzUGeYhRElWuFEf8K1S1EfvD1vixCQ==",
+      "version": "13.0.1",
+      "resolved": "https://registry.npmjs.org/eslint-config-standard/-/eslint-config-standard-13.0.1.tgz",
+      "integrity": "sha512-zLKp4QOgq6JFgRm1dDCVv1Iu0P5uZ4v5Wa4DTOkg2RFMxdCX/9Qf7lz9ezRj2dBRa955cWQF/O/LWEiYWAHbTw==",
       "dev": true
     },
     "eslint-config-standard-jsx": {
@@ -6102,12 +6101,20 @@
       }
     },
     "eslint-plugin-cypress": {
-      "version": "2.2.1",
-      "resolved": "https://registry.npmjs.org/eslint-plugin-cypress/-/eslint-plugin-cypress-2.2.1.tgz",
-      "integrity": "sha512-WkH81MEALKhnpeRo/wWHBHR883LdkS8aFzbGAGFxiwRwik2IKBZxb/JrxbiA6+SZskXGcmdEi6rwL7xmiqo9MA==",
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/eslint-plugin-cypress/-/eslint-plugin-cypress-2.6.1.tgz",
+      "integrity": "sha512-OVdxKbQ5DGcAGxvgZJRng7g01w/4xqEk65FGc8xELMcTdTjzh1m7FFjEQSglv1Y/TIDsOHaA5b+/ojQp4I2QhA==",
       "dev": true,
       "requires": {
-        "globals": "^11.0.1"
+        "globals": "^11.12.0"
+      },
+      "dependencies": {
+        "globals": {
+          "version": "11.12.0",
+          "resolved": "https://registry.npmjs.org/globals/-/globals-11.12.0.tgz",
+          "integrity": "sha512-WOBp/EEGUiIsJSp7wcv/y6MO+lV9UoncWqxuFfm8eBwzWNgyfBd6Gz+IeKQ9jCmyhoH99g15M3T+QaVHFjizVA==",
+          "dev": true
+        }
       }
     },
     "eslint-plugin-es": {
@@ -6344,6 +6351,15 @@
         "estraverse": "^4.1.1"
       }
     },
+    "eslint-stats": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/eslint-stats/-/eslint-stats-1.0.1.tgz",
+      "integrity": "sha512-5/5v8UvciDsXFNb+e+DMjOX8YZY2l1zpZ8ga3s5pV2CJ/dR0MOFFVXGLItn/jiey+FGBEmCKkFfZlJQra4uQMw==",
+      "requires": {
+        "chalk": "^2.4.1",
+        "lodash": "^4.17.4"
+      }
+    },
     "eslint-utils": {
       "version": "1.3.1",
       "resolved": "https://registry.npmjs.org/eslint-utils/-/eslint-utils-1.3.1.tgz",
@@ -7068,7 +7084,7 @@
       "dependencies": {
         "combined-stream": {
           "version": "1.0.6",
-          "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
+          "resolved": "http://registry.npmjs.org/combined-stream/-/combined-stream-1.0.6.tgz",
           "integrity": "sha1-cj599ugBrFYTETp+RFqbactjKBg=",
           "requires": {
             "delayed-stream": "~1.0.0"
@@ -7232,8 +7248,7 @@
         "ansi-regex": {
           "version": "2.1.1",
           "resolved": "https://registry.npmjs.org/ansi-regex/-/ansi-regex-2.1.1.tgz",
-          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8=",
-          "optional": true
+          "integrity": "sha1-w7M6te42DYbg5ijwRorn7yfWVN8="
         },
         "is-fullwidth-code-point": {
           "version": "1.0.0",
@@ -7259,7 +7274,6 @@
           "version": "3.0.1",
           "resolved": "https://registry.npmjs.org/strip-ansi/-/strip-ansi-3.0.1.tgz",
           "integrity": "sha1-ajhfuIU9lS1f8F0Oiq+UJ43GPc8=",
-          "optional": true,
           "requires": {
             "ansi-regex": "^2.0.0"
           }
@@ -10857,7 +10871,6 @@
       "version": "2.3.5",
       "resolved": "https://registry.npmjs.org/minipass/-/minipass-2.3.5.tgz",
       "integrity": "sha512-Gi1W4k059gyRbyVUZQ4mEqLm0YIUiGYfvxhF6SIlk3ui1WVxMTGfGdQ2SInh3PDrRTVvPKgULkpJtT4RH10+VA==",
-      "optional": true,
       "requires": {
         "safe-buffer": "^5.1.2",
         "yallist": "^3.0.0"
@@ -10866,14 +10879,12 @@
         "safe-buffer": {
           "version": "5.1.2",
           "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.1.2.tgz",
-          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g==",
-          "optional": true
+          "integrity": "sha512-Gd2UZBJDkXlY7GbJxfsE8/nvKkUEU1G38c1siN6QP6a9PT9MmHB8GnpscSmMJSoF8LOIrt8ud/wPtojys4G6+g=="
         },
         "yallist": {
           "version": "3.0.3",
           "resolved": "https://registry.npmjs.org/yallist/-/yallist-3.0.3.tgz",
-          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A==",
-          "optional": true
+          "integrity": "sha512-S+Zk8DEWE6oKpV+vI3qWkaK+jSbIK86pCwe2IF/xwIpQ8jEuxpw9NyaGjmp9+BoJv5FV2piqCDcoCtStppiq2A=="
         }
       }
     },
@@ -17255,4 +17266,4 @@
       }
     }
   }
-}
+}
\ No newline at end of file
diff --git a/package.json b/package.json
index 1222176f14..ee7b342a2f 100644
--- a/package.json
+++ b/package.json
@@ -183,9 +183,9 @@
     "enzyme-adapter-react-16": "1.14.0",
     "enzyme-to-json": "3.3.5",
     "eslint": "6.1.0",
-    "eslint-config-standard": "12.0.0",
+    "eslint-config-standard": "13.0.1",
     "eslint-config-standard-react": "7.0.2",
-    "eslint-plugin-cypress": "2.2.1",
+    "eslint-plugin-cypress": "2.6.1",
     "eslint-plugin-import": "2.18.2",
     "eslint-plugin-node": "9.1.0",
     "eslint-plugin-promise": "4.2.1",
@@ -207,4 +207,4 @@
     "stylelint-scss": "3.9.0",
     "supertest": "4.0.2"
   }
-}
+}
\ No newline at end of file