Drop supports Node.js v8-10, v13 and v15

.circleci/config.yml

@@ -2,13 +2,12 @@ workflows:
   version: 2
   node-multi-build:
     jobs:
-      - node-v8
-      - node-v10
+      - eslint-v6
       - eslint-v7
-      - eslint-v8
       - ts-eslint-v4
       - node-v12
       - node-v14
+      - node-v16
       - lint
 
 version: 2
@@ -35,9 +34,9 @@ jobs:
       #     paths:
       #       - node_modules
 
-  node-v8:
+  eslint-v6:
     docker:
-      - image: node:8
+      - image: node:12
     steps:
       - run:
           name: Versions
@@ -46,25 +45,7 @@ jobs:
       - run:
           name: Install eslint@6
           command: |
-            npm install --save-exact eslint@6.8.0 @typescript-eslint/parser@3.10.1 typescript@4.0.8
-      - run:
-          name: Install dependencies
-          command: npm install
-      - run:
-          name: Test
-          command: npm test
-  node-v10:
-    docker:
-      - image: node:10
-    steps:
-      - run:
-          name: Versions
-          command: npm version
-      - checkout
-      - run:
-          name: Install eslint@7 and @typescript-eslint/parser@4
-          command: |
-            npm install eslint@7 @typescript-eslint/parser@^4
+            npm install --save-exact eslint@6.8.0
       - run:
           name: Install dependencies
           command: npm install
@@ -73,7 +54,7 @@ jobs:
           command: npm test
   eslint-v7:
     docker:
-      - image: node:10
+      - image: node:14
     steps:
       - run:
           name: Versions
@@ -89,24 +70,6 @@ jobs:
       - run:
           name: Test
           command: npm test
-  eslint-v8:
-    docker:
-      - image: node:14
-    steps:
-      - run:
-          name: Versions
-          command: npm version
-      - checkout
-      - run:
-          name: Install eslint@8
-          command: |
-            npm install eslint@^8.0.0-0
-      - run:
-          name: Install dependencies
-          command: npm install
-      - run:
-          name: Test
-          command: npm test
   ts-eslint-v4:
     docker:
       - image: node:14
@@ -116,9 +79,9 @@ jobs:
           command: npm version
       - checkout
       - run:
-          name: Install @typescript-eslint/parser@4
+          name: Install @typescript-eslint/parser@4 eslint@7
           command: |
-            npm install @typescript-eslint/parser@^4
+            npm install @typescript-eslint/parser@^4 eslint@7
       - run:
           name: Install dependencies
           command: npm install
@@ -133,6 +96,10 @@ jobs:
     <<: *node-base
     docker:
       - image: node:14
+  node-v16:
+    <<: *node-base
+    docker:
+      - image: node:16
 
   lint:
     docker:
@@ -153,5 +120,5 @@ jobs:
           paths:
             - node_modules
       - run:
-          name: Test
+          name: Lint
           command: npm run lint

.eslintrc.js

@@ -10,7 +10,12 @@ module.exports = {
     node: true,
     mocha: true
   },
-  extends: ['plugin:eslint-plugin/recommended', 'prettier'],
+  extends: [
+    'plugin:eslint-plugin/recommended',
+    'prettier',
+    'plugin:node-dependencies/recommended',
+    'plugin:jsonc/recommended-with-jsonc'
+  ],
   plugins: ['eslint-plugin', 'prettier'],
   rules: {
     'accessor-pairs': 2,
@@ -142,6 +147,12 @@ module.exports = {
         'no-invalid-meta': 'error',
         'no-invalid-meta-docs-categories': 'error'
       }
+    },
+    {
+      files: ['*.json'],
+      rules: {
+        'prettier/prettier': 'off'
+      }
     }
   ]
 }

.vscode/settings.json

@@ -6,7 +6,9 @@
     "eslint.validate": [
         "javascript",
         "javascriptreact",
-        "vue"
+        "vue",
+        "json",
+        "jsonc"
     ],
     "typescript.tsdk": "node_modules/typescript/lib",
     "vetur.validation.script": false,

docs/user-guide/README.md

@@ -23,7 +23,7 @@ yarn add -D eslint eslint-plugin-vue
 ::: tip Requirements
 
 - ESLint v6.2.0 and above
-- Node.js v8.10.0 and above
+- Node.js v12.22.x, v14.17.x, v16.x and above
 
 We have started supporting ESLint v8.0.0 beta, but note that beta support will be dropped once the stable version is released.
 

eslint-internal-rules/.eslintrc.json

@@ -2,5 +2,13 @@
   "rules": {
     "no-invalid-meta-docs-categories": "error",
     "no-invalid-meta": "error"
-  }
+  },
+  "overrides": [
+    {
+      "files": ["*.json"],
+      "rules": {
+        "no-invalid-meta": "off"
+      }
+    }
+  ]
 }

lib/rules/no-unsupported-features.js

@@ -137,7 +137,7 @@ module.exports = {
      * @returns {boolean} `true` if it's supporting.
      */
     function isNotSupportingVersion(aCase) {
-      return !semverSubset(versionRange, getSemverRange(aCase.supported))
+      return !semver.subset(versionRange, getSemverRange(aCase.supported))
     }
 
     /** @type {TemplateListener} */
@@ -171,208 +171,3 @@ module.exports = {
     )
   }
 }
-
-// TODO replace semver.subset() in the major version.
-/**
- * semver.subset()
- *
- * We need to use a copy of the semver source code until a major version upgrade.
- *
- * @see https://github.com/npm/node-semver/blob/e79ac3a450e8bb504e78b8159e3efc70895699b8/ranges/subset.js#L43
- * @license ISC at Isaac Z. Schlueter and Contributors
- * https://github.com/npm/node-semver/blob/master/LICENSE
- *
- * @param {semver.Range} sub
- * @param {semver.Range} dom
- */
-function semverSubset(sub, dom) {
-  if (sub === dom) return true
-
-  sub = new semver.Range(sub)
-  dom = new semver.Range(dom)
-  let sawNonNull = false
-
-  // eslint-disable-next-line no-labels
-  OUTER: for (const simpleSub of sub.set) {
-    for (const simpleDom of dom.set) {
-      const isSub = simpleSubset(simpleSub, simpleDom)
-      sawNonNull = sawNonNull || isSub !== null
-      // eslint-disable-next-line no-labels
-      if (isSub) continue OUTER
-    }
-    if (sawNonNull) return false
-  }
-  return true
-}
-
-/**
- * @license ISC at Isaac Z. Schlueter and Contributors
- * https://github.com/npm/node-semver/blob/master/LICENSE
- * @param {readonly semver.Comparator[]} sub
- * @param {readonly semver.Comparator[]} dom
- */
-function simpleSubset(sub, dom) {
-  if (sub === dom) return true
-
-  /**
-   * @param {semver.Comparator} c
-   */
-  function isAny(c) {
-    return Object.keys(c.semver).length === 0
-  }
-
-  if (sub.length === 1 && isAny(sub[0])) {
-    if (dom.length === 1 && isAny(dom[0])) return true
-    else sub = [new semver.Comparator('>=0.0.0')]
-  }
-
-  if (dom.length === 1 && isAny(dom[0])) {
-    dom = [new semver.Comparator('>=0.0.0')]
-  }
-
-  const eqSet = new Set()
-  let gt, lt
-  for (const c of sub) {
-    if (c.operator === '>' || c.operator === '>=') gt = higherGT(gt, c)
-    else if (c.operator === '<' || c.operator === '<=') lt = lowerLT(lt, c)
-    else eqSet.add(c.semver)
-  }
-
-  if (eqSet.size > 1) return null
-
-  let gtltComp
-  if (gt && lt) {
-    gtltComp = semver.compare(gt.semver, lt.semver)
-    if (gtltComp > 0) return null
-    else if (gtltComp === 0 && (gt.operator !== '>=' || lt.operator !== '<='))
-      return null
-  }
-
-  // will iterate one or zero times
-  for (const eq of eqSet) {
-    if (gt && !semver.satisfies(eq, String(gt))) return null
-
-    if (lt && !semver.satisfies(eq, String(lt))) return null
-
-    for (const c of dom) {
-      if (!semver.satisfies(eq, String(c))) return false
-    }
-
-    return true
-  }
-
-  let higher, lower
-  let hasDomLT, hasDomGT
-  // if the subset has a prerelease, we need a comparator in the superset
-  // with the same tuple and a prerelease, or it's not a subset
-  let needDomLTPre = lt && lt.semver.prerelease.length ? lt.semver : false
-  let needDomGTPre = gt && gt.semver.prerelease.length ? gt.semver : false
-  // exception: <1.2.3-0 is the same as <1.2.3
-  if (
-    needDomLTPre &&
-    needDomLTPre.prerelease.length === 1 &&
-    lt &&
-    lt.operator === '<' &&
-    needDomLTPre.prerelease[0] === 0
-  ) {
-    needDomLTPre = false
-  }
-
-  for (const c of dom) {
-    hasDomGT = hasDomGT || c.operator === '>' || c.operator === '>='
-    hasDomLT = hasDomLT || c.operator === '<' || c.operator === '<='
-    if (gt) {
-      if (needDomGTPre) {
-        if (
-          c.semver.prerelease &&
-          c.semver.prerelease.length &&
-          c.semver.major === needDomGTPre.major &&
-          c.semver.minor === needDomGTPre.minor &&
-          c.semver.patch === needDomGTPre.patch
-        ) {
-          needDomGTPre = false
-        }
-      }
-      if (c.operator === '>' || c.operator === '>=') {
-        higher = higherGT(gt, c)
-        if (higher === c && higher !== gt) return false
-      } else if (
-        gt.operator === '>=' &&
-        !semver.satisfies(gt.semver, String(c))
-      )
-        return false
-    }
-    if (lt) {
-      if (needDomLTPre) {
-        if (
-          c.semver.prerelease &&
-          c.semver.prerelease.length &&
-          c.semver.major === needDomLTPre.major &&
-          c.semver.minor === needDomLTPre.minor &&
-          c.semver.patch === needDomLTPre.patch
-        ) {
-          needDomLTPre = false
-        }
-      }
-      if (c.operator === '<' || c.operator === '<=') {
-        lower = lowerLT(lt, c)
-        if (lower === c && lower !== lt) return false
-      } else if (
-        lt.operator === '<=' &&
-        !semver.satisfies(lt.semver, String(c))
-      )
-        return false
-    }
-    if (!c.operator && (lt || gt) && gtltComp !== 0) return false
-  }
-
-  // if there was a < or >, and nothing in the dom, then must be false
-  // UNLESS it was limited by another range in the other direction.
-  // Eg, >1.0.0 <1.0.1 is still a subset of <2.0.0
-  if (gt && hasDomLT && !lt && gtltComp !== 0) return false
-
-  if (lt && hasDomGT && !gt && gtltComp !== 0) return false
-
-  // we needed a prerelease range in a specific tuple, but didn't get one
-  // then this isn't a subset.  eg >=1.2.3-pre is not a subset of >=1.0.0,
-  // because it includes prereleases in the 1.2.3 tuple
-  if (needDomGTPre || needDomLTPre) return false
-
-  return true
-}
-
-/**
- * @license ISC at Isaac Z. Schlueter and Contributors
- * https://github.com/npm/node-semver/blob/master/LICENSE
- * @param {semver.Comparator | void} a
- * @param {semver.Comparator} b
- */
-const higherGT = (a, b) => {
-  if (!a) return b
-  const comp = semver.compare(a.semver, b.semver)
-  return comp > 0
-    ? a
-    : comp < 0
-    ? b
-    : b.operator === '>' && a.operator === '>='
-    ? b
-    : a
-}
-
-/**
- * @license ISC at Isaac Z. Schlueter and Contributors
- * https://github.com/npm/node-semver/blob/master/LICENSE
- * @param {semver.Comparator | void} a
- * @param {semver.Comparator} b
- */
-const lowerLT = (a, b) => {
-  if (!a) return b
-  const comp = semver.compare(a.semver, b.semver)
-  return comp < 0
-    ? a
-    : comp > 0
-    ? b
-    : b.operator === '<' && a.operator === '<='
-    ? b
-    : a
-}