Introduction 👋

NightVue is a “crystal clear” development framework for Vue.js 2.x, powered by Vue CLI 4.x, a user-friendly tool for Vue.js development.

Unlike many other frameworks that come with pre-built components and styles, NightVue provides maximum flexibility for creating custom web interfaces. It is designed for developers who prefer to start from scratch. NightVue provides tools for you to use as you see fit.

For developers seeking a framework with ready-to-use UI solutions, we recommend popular options such as BootstrapVue, Vuetify, Vue Material. However, please check out our documentation as NightVue may still be the framework you need.

What's Included? 📦

Modules:

• vue.js v2.6.11
• vue-cli v.4.5.0
• vuex v3.4.0
• vue-router v2.6.11
• axios v0.24.0
• eslint v6.7.2
• svg-sprite-loader v6.0.11
• lodash v4.17.21
• babel 10.1.0
• vue2-touch-events v3.2.2
• vue-waves-effect v1.0.0

Features:

• Hot-reload dev server
• Well organized file structure
• Bunch of Sass mixins and functions
• ESLint validator
• Router layouts support
• Router pages transition
• Flexbox grid
• Normalize.css
• SVG sprite loader
• Images loader
• Fonts loader

Getting Started 🖱

Clone repo and install dependencies

git clone https://github.com/nightrunner91/nightvue.git
npm i

Run hot-reload dev server

npm run serve

Build your project

npm run build

Test or test and fix errors

npm run lint
npm run lint --fix

File Structure 📂

This is default NightVue file structure. We followed to the principles of modularity and extensibility during the development and recommend that you follow them aswell.

.
├── public
├── src
│   ├── assets
│       ├── fonts
│       ├── icons
│       └── images
│   ├── components
│       ├── Footer
│       ├── Header
│       └── SvgIcon
│   ├── layouts
│       AppLayout.vue
│       AppLayoutDefault.vue
│       AppLayoutFull.vue
│   ├── router
│       └── modules
│       index.js
│       RouterView.vue
│   ├── store
│       └── modules
│       index.js
│   ├── styles
|       ├── @core
│           └── helpers
│           _functions.scss
│           _mixins.scss
│           _variables.scss
│           globals.scss
│           normalize.scss
│           typography.scss
│       ├── animations
│       ├── components
│       └── sections
│       nightvue.scss
│       style.scss
│   └── views
│       Home.vue
│   App.vue
│   main.js

Let's take a look at the crucial parts of framework.

• src/assets folder includes any types of assets you are using in your project, such as icons, fonts, images, files etc. NightVue uses set of Webpack and Sass loaders to easy serve and manage them
• src/components folder includes reusable Vue components. By default this folder already includes Header, Footer and SvgIcon components as examples
• src/layouts folder includes different layout types for your project
• src/router folder includes Vue Router files
• src/store folder includes Vuex files
• src/styles folder includes stylesheets, Sass functions and mixins, usefull utilities.
  • src/styles/@core folder includes crucial NightVue Sass mixins, functions and code generators to work with
    • src/styles/@core/helpers - the folder includes SCSS files that generates utility classnames to use in HTML (grid, spacers, text styles, colors etc.)
    • src/styles/@core/globals.scss - this is key file where we import all functions, mixins and variables from so-called files at the same directory
    • src/styles/@core/typography.scss file describes all text styles (headings, displays, paragraphs, fonts etc)
    • src/styles/@core/normalize.scss makes browsers render all elements more consistently and in line with modern standards. It is basicly slightly modified SCSS version of widely used Normalize.css
  • src/styles/animations folder includes @keyframes
  • src/styles/components folder includes styles for reusable components like buttons, dropdowns, inputs, avatars, modals, alerts, etc.
  • src/styles/sections folder includes styles for "big" and unique parts like: header, footer, article, hero, etc.
  • src/styles/nightvue.scss file includes all NightVue settings, styles and code generators
  • src/styles/style.scss is file where you can write your own styles
• src/views folder includes Vue pages you are using in your project. By default it's only Home.vue page
• src/App.vue is the root Vue file
• src/main.js is the file where you import and register components, directives, styles, plugins etc.

Documentation 📚

• Layout
• Grid
• Typography
• Position
• Display
• Spacing
• Sizing
• Colors
• Gradients
• Opacity
• Icons
• Radius
• Shadows
• Z-index
• Transitions
• Animations
• Rotations
• Utilities

Layout

Vue.js doesn't provide layout functionality by default, but people found the way to do it, which is realy great. We also combined this method with Vue Router transitions to create smooth, dynamic and easy expandable layout system.

Key file in this system is AppLayout.vue. Here we created dynamic component to which we apply different layout types using is attribute:

<component
  :is="layout"
  class="layout"
  :class="[layoutClassnames]">
  <slot />
</component>

NightVue offers 2 types of layouts at the begining:

• default - widely used <header></header> → <main></main> → <footer></footer> layout
• full - plain page without any additional elements, just a simple <div></div>

These templates are stored in AppLayoutDefault.vue and AppLayoutFull.vue files respectively:

<template>
  <div>
    <app-header />
    <main class="main position-relative">
      <slot />
    </main>
    <app-footer />
  </div>
</template>

<template>
  <div class="minvh-100">
    <slot />
  </div>
</template>

You can modify them or create your own layouts. To do this create new Vue file named in such manner as default ones and don't forget to add new layouts in computed property of core file. This classnames will apply to root element:

layoutClassnames() {
  const layout = this.$route.meta.layout || defaultLayout

  if (layout === 'AppLayoutFull') return 'layout--full'
  if (layout === 'AppLayoutDefault') return 'layout--default'

  return null
},

Pay your attention to computed property layout(). It returns current page layout type using Vue Router meta fields:

const defaultLayout = 'AppLayoutDefault'

layout() {
  const layout = this.$route.meta.layout || defaultLayout
  return () => import(`@/layouts/${layout}.vue`)
},

When you add new page to Router, define it's layout using meta.layout param. If you don't provide any type, NightVue will apply default layout to this page:

{
  path: '/',
  name: 'Home',
  component: () => import('@/views/Home.vue'),
  meta: {
    layout: 'AppLayoutDefault',
  },
},

Now let's make things a bit more fancy. We wrapped root dynamic component in <transition></transition> tag to add smooth transition between pages:

<transition
  appear
  name="page"
  mode="out-in">
  <component
    :is="layout"
    class="layout"
    :class="[layoutClassnames]">
    <slot />
  </component>
</transition>

NightVue uses simple fade-out → fade-in transition effect by default. Here is small SCSS snippet to work with:

.layout {
  &.page-enter,
  &.page-leave-to {
    .main {
      opacity: 0;
    }
  }
}

.main {
  transition: transition(opacity, lazy);
}

You can learn more about transition classnames here and create your own. Also check this tutorial with examples of Vue Router transitions.

Grid

NightVue grid system is built with flexbox and is fully responsive. It uses a series of containers, rows, and cols to align content. If you are not familiar with flex we recomend to read this article.

There are 3 types of containers in NightVue:

• boxed - on each $breakpoint container will have fixed max-width based on $containers map
• combined - container will have max-width of last value from $containers map, then will have 100%
• full - container will always have 100% width

Base grid settings are stored in _variables.scss file:

$num-cols:      12;
$gutter-width:  1rem;
$grid-type:     'combined';

// Breakpoints are dublicated in 'store/modules/config.js'
$breakpoints: (
  xs: 576px,
  sm: 768px,
  md: 992px,
  lg: 1200px,
  xl: 1400px
);

// Containers max-widths (if you are using 'boxed' or 'combined' type)
$containers: (
  xs: 540px,
  sm: 720px,
  md: 960px,
  lg: 1140px,
  xl: 1320px
);

Remember that $breakpoints are dublicated in Vuex store in config.js file. NightVue watches for window resize event to update global Vuex store variables in real-time. It also constantly tracks current scroll position. You can read these values with computed properties windowSize(), currentBreakpoint() and windowScroll().

• windowSize() returns current window width and height
• currentBreakpoint() returns current "morphological" breakpoint value based on window width. By defaults there might be: 'xs', 'sm', 'md', 'lg' and 'xl'
• windowScroll() returns current scroll position

computed: {
  windowSize() {
    return this.$store.state.config.windowSize
  },

  currentBreakpoint() {
    return this.$store.state.config.currentBreakpoint
  }

  windowScroll() {
    return this.$store.state.config.windowScroll
  },
}

HTML grid usage

To apply column width in HTML you can use prepared classnames col-${breakpoint}-${value}:

<div class="container">
  <div class="row">
    <div class="col col-12 col-xs-10 col-sm-11 col-md-8 col-lg-6 col-xl-4">
      width 12 by default
      width 10 on 'xs' breakpoint
      width 11 on 'sm' breakpoint
      width 8 on 'md' breakpoint
      width 6 on 'lg' breakpoint
      width 4 on 'xl' breakpoint
    </div>
  </div>
</div>

If you need apply offset to column use offset-${breakpoint}-${value} classnames like this:

<div class="container">
  <div class="row">
    <div class="col col-4 offset-xs-4 offset-sm-5 offset-md-8 offset-lg-0">
      offset 4 columns on 'xs' breakpoint
      offset 5 columns on 'sm' breakpoint
      offset 8 columns on 'md' breakpoint
      don't do any offset on 'lg' breakpoint
    </div>
  </div>
</div>

If you need apply order to column use order-${breakpoint}-${value} classnames like this:

<div class="container">
  <div class="row">
    <div class="col col-6 order-xs-1 order-md-5">
      order 1 on 'xs' breakpoint
      order 5 on 'md' breakpoint
    </div>
  </div>
</div>

Sass grid mixins

While the HTML method is well-known to many developers, we strongly recommend using Sass mixins to construct grids directly in SCSS files. This approach leads to cleaner Vue templates and helps keep all styles in one place.

To convert any selector to container just apply @container() mixin to it:

@include container();
@include container('full');
@include container($type: 'boxed', $gutter: 2rem);

From now on this selector will have same properties as .container class. Notice that you can define $type and $gutter.

Just like with container you can convert any selector to .row. Simply apply @row() mixin to it. Additionally you can pass $gutter value. It will apply alternate negative left and right margins:

@include row();
@include row(0);
@include row($gutter: 2rem);

To apply column styles use @col() mixin. If you don't pass any params mixin will apply only padding-left and padding right based on $gutter-width varaible. To apply width properties you can pass number from 1 to 12 for each breakpoint:

@include col();
@include col(12);
@include col(10, $md: 8);
@include col(10, $md: 8, $lg: 6, $xs: 12);
@include col(12, 10, 10, 8, 6, 9);

If you need apply offset to column use @offset() mixin. It will add margin-left property to selector. You can pass number from 0 to 12 for each breakpoint. Note that if you don't pass any params, mixin won't apply any styles:

@include offset(6);
@include offset(0, $sm: 4);
@include offset(10, $md: 8);
@include offset(10, $md: 8, $lg: 6, $xs: 12);
@include offset($sm: 1, $lg: 4, $xl: 0);

In case you need apply order to column use @order() mixin. It will apply order property from 1 to 12 to selector:

@include order(2);
@include order(1, $sm: 4);
@include order(1, $md: 2, $lg: 3, $xs: 12);
@include order($sm: 12, $lg: 4, $xl: 3);

Media queries

NightVue provides set of handy media queries based on $breakpoints. You can use queries based on min-width and max-width:

// min-width queries
$xs-up; // > 576px
$sm-up; // > 768px
$md-up; // > 992px
$lg-up; // > 1200px
$xl-up; // > 1400px

// max-width queries
$xs-dw; // < 578px
$sm-dw; // < 767px
$md-dw; // < 991px
$lg-dw; // < 1199px
$xl-dw; // < 1399px

Or queries between breakpoints:

$xs-sm; // 576px … 767px
$sm-md; // 768px … 991px
$md-lg; // 992px … 1199px
$lg-xl; // 1200px … 1399px

Here are some examples of usage:

@media #{$sm-up} { ... } } // styles applies above 768px
@media #{$md-up} { ... } } // styles applies above 992px

@media #{$xl-dw} { ... } } // styles applies below 1399px
@media #{$lg-dw} { ... } } // styles applies below 1199px

@media #{$sm-md} { ... } } // styles applies between 768px … 991px
@media #{$md-lg} { ... } } // styles applies between 992px … 1199px

Typography

NightVue stores all typography settings in Sass maps located in _variables.scss file. In typography.scss file are described styles for headings, displays, body text, lists, and more.

Font import

We recomend to start with importing fonts by using @font-face mixin. Make sure to store your fonts in src/assets/fonts folder. Each font must be saved in a folder with the same name as font itself. By default NightVue uses Onest. This is how we stored and imported it, use this as an example to add your own fonts:

// Font files location:

├── src
│   ├── assets
│       ├── fonts
│           └── Onest

// Import font using @font-face mixin:

@include font-face('Onest', 'OnestRegular', 400, normal, 'recent');
@include font-face('Onest', 'OnestMedium', 500, normal, 'recent');
@include font-face('Onest', 'OnestBold', 700, normal, 'recent');
@include font-face('Onest', 'OnestBlack', 900, normal, 'recent');

Typography Sass maps

These are Sass maps with typography settings we talked earlier. Each one is self explanatory, so take a look at them:

$font-families: (
  base:      "Onest",
  headings:  "Onest",
  displays:  "Onest"
);

$line-heights: (
  1:  1,
  25: 1.25,
  50: 1.5,
  75: 1.75,
  2:  2,
);

$text-aligns: (
  left:    left, 
  center:  center, 
  right:   right, 
  justify: justify
);

$font-weights: (
  lighter: lighter, 
  bolder:  bolder, 

  100: 100, // thin
  200: 200, // extra light
  300: 300, // light
  400: 400, // normal
  500: 500, // medium
  600: 600, // semi bold
  700: 700, // bold
  800: 800, // extra bold
  900: 900, // black
);

$text-transforms: (
  lowercase:  lowercase, 
  uppercase:  uppercase, 
  capitalize: capitalize
);

$font-styles: (
  normal:  normal, 
  italic:  italic, 
  oblique: oblique
);

$text-decorations: (
  underline:    underline, 
  line-through: line-through, 
  none:         none
);

$text-wraps: (
  normal:   normal,
  nowrap:   nowrap,
  pre:      pre,
  pre-line: pre-line,
  pre-wrap: pre-wrap
);

$word-brakes: (
  normal:      normal,
  break-all:   break-all,
  keep-all:    keep-all,
  break-word:  break-word,
);

$letter-spacings: (
  normal:  normal,
  tight:   -0.05em,
  wide:   .1em,
  wider:  .5em,
);

Important part is settings for headings and displays:

$headings-fz: (
  h1: 4.5rem,
  h2: 2.5rem,
  h3: 1.75rem,
  h4: 1.25rem,
  h5: 1rem,
  h6: 0.875rem,
);
$headings-lh: map-get($line-heights, 25);
$headings-fw: map-get($font-weights, 500);
$headings-margins: (
  top: map-get($spacers, 1),
  bottom: map-get($spacers, 50),
);

$displays-fz: (
  display-1: 74px,
  display-2: 62px,
  display-3: 48px,
  display-4: 34px,
);
$displays-lh: map-get($line-heights, 25);
$displays-fw: map-get($font-weights, 500);
$displays-margins: (
  top: map-get($spacers, 1),
  bottom: map-get($spacers, 50),
);

Here you can manage styles for base body text, small and tagline styles:

$base-fz:      16px; // CRUCIAL VALUE! A lot of things depends on it. Be aware.
$base-lh:      map-get($line-heights, 50);
$base-fw:      map-get($font-weights, 400);

$small-fz:     0.875; // Ratio of text size for <small> tag and .small classname
$small-lh:     map-get($line-heights, 25);
$small-fw:     map-get($font-weights, 400);

$tagline-fz:   1.25; // Ratio of text size for .tagline classname
$tagline-lh:   map-get($line-heights, 50);
$tagline-fw:   map-get($font-weights, 500);

Typography utility classnames

For each Sass map NightVue generates set of utility classnames to use in HTML:

.font-base     { font-family: "Onest" }
.font-headings { font-family: "Onest" }
.font-displays { font-family: "Onest" }

.line-height-1  { line-height: 1 }
.line-height-25 { line-height: 1.25 }
.line-height-50 { line-height: 1.5 }
.line-height-75 { line-height: 1.75 }
.line-height-2  { line-height: 2 }

.text-left    { text-align: left }
.text-center  { text-align: center }
.text-right   { text-align: right }
.text-justify { text-align: justify }

.text-underline     { text-decoration: underline }
.text-line-through  { text-decoration: line-through }
.text-none          { text-decoration: none }

.white-space-normal    { white-space: normal }
.white-space-nowrap    { white-space: nowrap }
.white-space-pre       { white-space: pre }
.white-space-pre-line  { white-space: pre-line }
.white-space-pre-wrap  { white-space: pre-wrap }

.word-break-normal     { word-break: normal }
.word-break-break-all  { word-break: break-all }
.word-break-keep-all   { word-break: keep-all }
.word-break-break-word { word-break: break-word }

.text-lowercase  { text-transform: lowercase }
.text-uppercase  { text-transform: uppercase }
.text-capitalize { text-transform: capitalize }

.font-weight-lighter { font-weight: lighter }
.font-weight-bolder  { font-weight: bolder }
.font-weight-100     { font-weight: 100 }
.font-weight-200     { font-weight: 200 }
.font-weight-300     { font-weight: 300 }
.font-weight-400     { font-weight: 400 }
.font-weight-500     { font-weight: 500 }
.font-weight-600     { font-weight: 600 }
.font-weight-700     { font-weight: 700 }
.font-weight-800     { font-weight: 800 }
.font-weight-900     { font-weight: 900 }

.font-normal   { font-style: normal }
.font-italic   { font-style: italic }
.font-oblique  { font-style: oblique }

.spacing-normal  { letter-spacing: normal }
.spacing-tight   { letter-spacing: -0.05em }
.spacing-wide    { letter-spacing: 0.1em }
.spacing-wider   { letter-spacing: 0.5em }

Each classname supports breakpoints. You can use template ${property}-${breakpoint}-{$value} to easy change text styles across different breakpoints. For example this font-weight will apply only on sm breakpoint:

@media screen and (min-width: 768px) {
  .font-weight-sm-500 {
      font-weight: 500 ;
  }
}

To apply small styles to text you can add .small classname or wrap element in <small></small> tag. Another way is to use @small() mixin:

<div class="small">I am small text</div>
<small>Me too!</small>

@include small() }

Apply tagline styles to text in similar way:

<div class="tagline">I am tagline text</div>

@include tagline() }

Often you need to truncate some long text and put dots at the end of the line. Use one of these helpers to do that:

<div class="text-truncate" style="width: 120px;">
  I am very long text and I will be truncated at 120px width
</div>

<div class="text-truncate max-w-25">
  I am very long text and I will be truncated at 25% width
</div>

<div class="text-dotted">
  I will not be truncated, but will have '…' at the end
</div>

.text-truncate {
  display: inline-block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.text-dotted {
  &:after {
    content: '…'
  }
}

Or use @text-truncate($width) mixin for that. It requires a single argument $width in px or %.

@include text-truncate(150px)

// =>
display: inline-block;
overflow: hidden;
text-overflow: ellipsis;
max-width: 150px;

Position

These utility classnames will help you to set and change position property of elements.

.position-relative  { position: relative }
.position-absolute  { position: absolute }
.position-static    { position: static }
.position-fixed     { position: fixed }
.position-static    { position: static }

Each classname supports breakpoint, so you can easily change behaviour of element across different breakpoints. Use template .position-${breakpoint}-{$value} for that. For example, this element will be in position: absolute only on LG breakpoint:

@media screen and (min-width: 1280px) {
  .position-lg-absolute {
     position: absolute
  }
}

Display

Display system allows you to change display property and quickly manage the layout, alignment, and sizing of elements with a full suite of responsive flexbox utilities. If you are not familiar with flex we advice you to read this article first. Utility classnames are generated in _display.scss file.

Here are listed possible variants of display property:

.d-none          { display: none }
.d-block         { display: block }
.d-inline        { display: inline }
.d-inline-block  { display: inline-block }
.d-flex          { display: flex }
.d-inline-flex   { display: inline-flex }
.d-table         { display: table }
.d-table-cell    { display: table-cell }
.d-table-row     { display: table-row }

NightVue generates classnames based on flexbox settings:

• flex-direction
• justify-content
• align-items
• align-self
• align-content
• flex-wrap
• flex-grow
• flex-shrink

Here are possible variants for each of those:

.flex-row             { flex-direction: row }
.flex-row-reverse     { flex-direction: row-reverse }
.flex-column          { flex-direction: column }
.flex-column-reverse  { flex-direction: column-reverse }

.justify-content-start    { justify-content: start }
.justify-content-end      { justify-content: end }
.justify-content-center   { justify-content: center }
.justify-content-between  { justify-content: space-between }
.justify-content-around   { justify-content: space-around }

.align-items-start     { align-items: start }
.align-items-end       { align-items: end }
.align-items-center    { align-items: center }
.align-items-baseline  { align-items: baseline }
.align-items-stretch   { align-items: stretch }

.align-self-start     { align-self: start }
.align-self-end       { align-self: end }
.align-self-center    { align-self: center }
.align-self-baseline  { align-self: baseline }
.align-self-stretch   { align-self: stretch }

.align-content-start     { align-content: start }
.align-content-end       { align-content: end }
.align-content-center    { align-content: center }
.align-content-baseline  { align-content: baseline }
.align-content-stretch   { align-content: stretch }

.flex-wrap          { flex-wrap: wrap }
.flex-nowrap        { flex-wrap: nowrap }
.flex-wrap-reverse  { flex-wrap: wrap-reverse }

.flex-grow-0    { flex-grow: 0 }
.flex-grow-1    { flex-grow: 1 }

.flex-shrink-0  { flex-shrink: 0 }
.flex-shrink-1  { flex-shrink: 1 }

Each classname supports breakpoints, which can help you to easy change display and flex properties across different breakpoints. Use template ${property}-${breakpoint}-{$value} for that. Take a look at some examples:

@media screen and (min-width: 1400px) {
  .d-xl-none { display: none }
}

@media screen and (min-width: 1200px) {
  .flex-lg-column { flex-direction: column }
}

@media screen and (min-width: 992px) {
  .justify-content-md-center { justify-content: center }
}

@media screen and (min-width: 768px) {
  .align-items-sm-start { align-items: start }
}

@media screen and (min-width: 576px) {
  .flex-wrap-xs-nowrap { flex-wrap: nowrap }
}

Often you need to align content right in the center of X and Y axes. In that case use classname .flex-center on parent element. It also supports breakpoints.

.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-xs-center { ... }  // styles applies above 576px
.flex-sm-center { ... }  // styles applies above 768px
.flex-md-center { ... }  // styles applies above 992px
.flex-lg-center { ... }  // styles applies above 1200px
.flex-xl-center { ... }  // styles applies above 1400px

Spacing

NightVue generates responsive margin and padding utility classnames. The classnames are named using the format {$property}-{$breakpoint}-{$side}-{$size}.

Where $property is one of:

• m - for classnames that set property margin
• p - for classnames that set property padding

Where $breakpoint is one of:

• xs - for classnames that set property property on XS breakpoint > 576px
• sm - for classnames that set property property on SM breakpoint > 768px
• md - for classnames that set property property on MD breakpoint > 992px
• lg - for classnames that set property property on LG breakpoint > 1200px
• xl - for classnames that set property property on XL breakpoint > 1400px
• blank - if you want to set a margin and padding on all breakpoint

Where $side is one of:

• t - for classnames that set property margin-top or padding-top
• b - for classnames that set property margin-bottom or padding-bottom
• l - for classnames that set property margin-left or padding-left
• r - for classnames that set property margin-right or padding-right
• x - for classnames that set property both *-left and *-right
• y - for classnames that set property both *-top and *-bottom
• blank - for classnames that set property a margin or padding on all 4 sides of the element

Where $size is one of spacing sizes defined in _variables.scss file:

$spacer: 1rem;

$spacers: (
  0: 0,
  1: ($spacer * .25),
  2: ($spacer * .5),
  3: ($spacer * .75),
  4: ($spacer * 1),
  5: ($spacer * 1.25),
  6: ($spacer * 1.5),
  7: ($spacer * 1.75),
  8: ($spacer * 2),
  9: ($spacer * 2.25),
  10: ($spacer * 2.5),
  11: ($spacer * 2.75),
  12: ($spacer * 3),
  13: ($spacer * 3.25),
  14: ($spacer * 3.5),
  15: ($spacer * 3.75),
  16: ($spacer * 4),
  17: ($spacer * 4.25),
  18: ($spacer * 4.5),
  19: ($spacer * 4.75),
  20: ($spacer * 5),
  auto: auto
);

$base-mg: map-get($spacers, 1); // Universal margin used for <p>, <ul> etc.

We crated a tool NightVue Spacers Generator, where you can quickly see spacing results based on your initial settings.

In case you prefer SCSS method to define spacers use spacer() function for that.

• If you pass one param it will return spacer value
• If you pass two params it will return X and Y spacer values
• If you pass four params it will return top, right, bottom and left spacer values

padding: spacer(2);
// => padding: .25rem;

padding-right: spacer(5);
// => padding-right: 1.25rem;

margin: spacer(3, auto);
// => margin: .75rem auto;

margin: spacer(5, auto, 2, 0);
// => margin: 1.25rem auto 0.25rem 0;

Beside that NightVue generates classnames which you might use to position elements in absolute or fixed position. These classnames uses pattern ${side}-${size}:

.top-2     { top: .25rem }
.right-10  { right: 2.5rem }
.bottom-4  { bottom: 1rem }
.left-5    { left: 1.25rem }

And of course they also support breakpoints:

@media screen and (min-width: 768px) {
  .right-sm-4 {
      right: 1rem
   }
}

Sizing

These utility classnames can be used apply to selector these CSS styles: width, max-width, min-width, height, max-height, min-height. And units can be percentages % or relative to viewport vw and vh.

NightVue generates set of classnames which uses format ${property}-${breakpoint}-${size}, where ${property} is one of:

• w - for width in %
• vw - for width in vw
• max-w - for max-width in %
• max-vw - for max-width in vw
• min-w - for min-width in %
• min-vw - for min-width in vw
• h - for height in %
• vh - for height in vw
• max-h - for max-height in %
• max-vh - for max-height in vw
• min-h - for min-height in %
• min-vh - for min-height in vw

Where $size is one of sizing values defined in _variables.scss file:

$sizings: (
  0:    0,
  25:   25,
  50:   50,
  75:   75,
  100:  100,
  auto: auto
);

Here are generated sizing classnames based on 50 size as an example:

.w-50      { width: 50% }
.vw-50     { width: 50vw }
.max-w-50  { max-width: 50% }
.max-vw-50 { max-width: 50vw }
.min-w-50  { min-width: 50% }
.min-vw-50 { min-width: 50vw }

.h-50     { height: 50% }
.vh-50     { height: 50vh }
.max-h-50  { max-height: 50% }
.max-vh-50 { max-height: 50vh }
.min-h-50  { min-height: 50% }
.min-vh-50 { min-height: 50vh }

You can also apply ${breakpoints} to dynamically change behavior on different screen sizes. For example, this min-width style will apply only below 768px (sm breakpoint):

<div class="min-w-sm-50 min-w-75">
  I have min-width 50% below 768px and 75% above
</div>

@media screen and (min-width: 768px) {
  .min-w-sm-50 {
    min-width: 50%;
  }
}

.min-w-sm-75 {
  min-width: 75%;
}

Don't forget that you can also apply auto sizing to an element:

.w-auto     { width: auto }
.max-w-auto { max-width: auto }
.min-w-auto { min-width: auto }

.h-auto     { height: auto }
.max-h-auto { max-height: auto }
.min-h-auto { min-height: auto }

Colors

NightVue uses Sass maps to store project colors. This maps will help you quickly and easily loop over a list of colors and their hex values.

• $colors map includes all available "basic" colors in project
• $grays map includes achromatic list (shades of gray between #fff and #000)
• $theme-colors map includes semantically named colors composed from maps above

All this maps are described in _variables.scss file:

$colors: (
  'red':       #F44336,
  'pink':      #EC407A,
  'orange':    #FF9800,
  'yellow':    #FFEE58,
  'green':     #47b05b,
  'brown':     #795548,
  'teal':      #009688,
  'cyan':      #00BCD4,
  'blue':      #2196F3,
  'purple':    #682CAB,
);

$grays: (
  'white':   #ffffff,
  'gray-1':  #eaeaea,
  'gray-2':  #d5d5d5,
  'gray-3':  #bfbfbf,
  'gray-4':  #aaaaaa,
  'gray-5':  #959595,
  'gray-6':  #cccccc,
  'gray-7':  #6a6a6a,
  'gray-8':  #555555,
  'gray-9':  #404040,
  'gray-10': #2b2b2b,
  'black':   #000000,
);

$theme-colors: (
  'primary':    map-get($colors, 'purple'),
  'secondary':  map-get($colors, 'blue'),
  'success':    map-get($colors, 'green'),
  'info':       map-get($colors, 'teal'),
  'warning':    map-get($colors, 'yellow'),
  'danger':     map-get($colors, 'red'),
  'light':      map-get($grays, 'gray-2'),
  'dark':       map-get($grays, 'gray-8'),
);

In map $levels you can define levels of lightening and saturation of each color in $theme-colors map. By default this map has 5 levels:

$levels: (
  1: 10%,
  2: 20%,
  3: 30%,
  4: 40%,
  5: 50%,
);

Colors HTML Usage

NightVue automatically generates classnames from maps $grays and $theme-colors above. Each color have unique classname with background-color, color and fill styles and uses template ${property}-${color}, where ${property} is one of:

• bg for background-color
• clr for text color
• fill for SVG fill color

Here are some examples:

.bg-white   { background-color: #ffffff }
.clr-white  { color: #ffffff }
.fill-white { fill: #ffffff }

.bg-gray-1   { background-color: #eaeaea }
.clr-gray-1  { color: #eaeaea }
.fill-gray-1 { fill: #eaeaea }

.bg-primary   { background-color: #682CAB }
.clr-primary  { color: #682CAB }
.fill-primary { fill: #682CAB }

Additionally for each color NightVue generates classnames with brightened, darkened, saturated and desaturated color variations from $theme-colors map. We are using mix() and scale() functions for that. They help to create smooth and steady color pallete. We created NightVue Pallete Generator to quickly see the results, check it out.

Generated classnames uses pattern ${property}-${color}-${style}-${level}. Let's take a look at color variations of primary color:

.clr-primary-light-1 { color: #7741b3 }
.clr-primary-light-2 { color: #7f4cb8 }
.clr-primary-light-3 { color: #8656bc }
.clr-primary-light-4 { color: #8e61c0 }
.clr-primary-light-5 { color: #956bc4 }

.clr-primary-dark-1 { color: #5e289a }
.clr-primary-dark-2 { color: #582591 }
.clr-primary-dark-3 { color: #532389 }
.clr-primary-dark-4 { color: #4e2180 }
.clr-primary-dark-5 { color: #491f78 }

.clr-primary-sat-1 { color: #6828af }
.clr-primary-sat-2 { color: #6825b2 }
.clr-primary-sat-3 { color: #6823b4 }
.clr-primary-sat-4 { color: #6721b6 }
.clr-primary-sat-5 { color: #671fb8 }

.clr-primary-desat-1 { color: #6832a5 }
.clr-primary-desat-2 { color: #6936a1 }
.clr-primary-desat-3 { color: #69399e }
.clr-primary-desat-4 { color: #693c9b }
.clr-primary-desat-5 { color: #693f98 }

Beside that you can use rgba versions of $theme-colors. For each opacity value from $opacities map NightVue generates set of transparent colors:

$opacities: (
  0: 0%,
  1: 5%,
  2: 15%,
  3: 25%,
  4: 35%,
  5: 45%,
  6: 55%,
  7: 65%,
  8: 75%,
  9: 85%,
  10: 95%
);

These classnames uses pattern ${property}-${color}-opacity-${opacity}. Take a look at rgba variants of success color as example:

.bg-success-opacity-0  { rgba(71, 176, 91, 0) }
.bg-success-opacity-1  { rgba(71, 176, 91, 0.05) }
.bg-success-opacity-2  { rgba(71, 176, 91, 0.15) }
.bg-success-opacity-3  { rgba(71, 176, 91, 0.25) }
...
.bg-success-opacity-10 { rgba(71, 176, 91, 0.95) }

Color Sass functions

If you need apply colors in SCSS files you can use color($name, $style, $level) function. It returns hex value of color by its $name. Additionally you can pass optional arguments $style and $level to determine level of brightness or saturation. Or you can define it's $opacity level. Here are some examples of usage in SCSS:

box-shadow: 1px 1px 4px color('primary');
// => box-shadow: 1px 1px 4px #682CAB;

border-color: color('secondary', light, 2);
// => border-color: #42a6f5;

border-color: color('success', dark, 4);
// => border-color: #358444;

color: color('danger', sat, 2);
// => color: #f64234;

background-color: color('warning', desat, 4);
// => background-color: #eadd6d;

color: color('white');
// => color: #ffffff;

color: color('white', $opacity: 5);
// => color: rgba(255, 255, 255, 0.45);

fill: color('gray-4');
// => fill: #aaaaaa;

Gradients

Working with linear-gradients can sometimes be awkward and clunky. Remembering all the settings and features of this CSS function can be challenging. NightVue offers tools to easily manage a group of gradients and create new ones with ease. If you're not familiar with linear-gradients, we recommend reading the MDN Documentation.

NightVue uses a Sass map called $gradients to store all gradients used in the project. This map is located in the _variables.scss file and contains four gradients as examples by default.

$gradients: (
  primary_success: (
    direction: 145deg,
    fallback: map-get($theme-colors, 'primary'),
    list: (
      lighten(map-get($theme-colors, 'primary'), map-get($levels, 2)) 10%,
      lighten(map-get($theme-colors, 'success'), map-get($levels, 1)) 80%
    )
  ),

  primary-light-3_primary: (
    direction: to bottom,
    fallback: map-get($theme-colors, 'primary'),
    list: (
      map-get($theme-colors, 'primary'),
      lighten(map-get($theme-colors, 'primary'), map-get($levels, 3))
    )
  ),

  red_yellow_blue: (
    direction: to right,
    fallback: map-get($colors, 'red'),
    list: (
      map-get($colors, 'red'),
      map-get($colors, 'yellow'),
      map-get($colors, 'blue')
    )
  ),

  info_transparent: (
    direction: 90deg,
    fallback: map-get($theme-colors, 'info'),
    list: (
      map-get($theme-colors, 'info'),
      transparent
    )
  ),
);

We recomend to name gradients in such pattern: <color1>_<color2>_<color3>. It will help you to easy understand what colors are used and what is direction of gradient. Here are some examples: info_success, primary_danger, light_dark, transparent_black, red_yellow_blue.

If gradient uses modified color you may name it like this: <color-${style}-${value}>_<color-${style}-${value}>. For example, gradient named primary-light-3_primary indicates that it uses lightened by 3 levels $primary and base $primary colors and shows the direction of it. Pretty self explanatory, right?

Now let's take a look at gradient itself. Each one is written by template:

gradientName: (
  direction: { String },
  fallback: { String },
  list: ( { String }, { String }, { String }... )
)

Where direction is obviously direction of linear-gradient. It may be keyword:

• to top
• to top right
• to right
• to bottom right
• to bottom
• to bottom left
• to left,
• to left top

or any angle value in deg, rad, grad or turn.

Parameter fallback is color by default for unsupported browsers. To know which browsers don't support linear-gradient visit caniuse.com website.

And finally most inetersting part is list parameter. This is basicly a list of colors in gradient, separated by a comma. One way to fill it is by using map-get() function like we did in examples above.

Gradients HTML usage

For each gradient in $gradients map NightVue generates unique classname with template .gradient-${gradient}:

.gradient-primary_success {
  background: #682cab;
  background: linear-gradient(145deg, #8e51d2 10%, #68c279 80%);
}

.gradient-primary-light-3_primary {
  background: #682CAB;
  background: linear-gradient(to bottom, #682CAB, #9b65d8);
}

.gradient-red_yellow_blue {
  background: #f44336;
  background: linear-gradient(90deg, #f44336, #ffee58, #2196f3);
}

.gradient-info_transparent{
  background: #009688;
  background: linear-gradient(90deg, #009688, transparent);
}

Gradient Sass mixin

In case you need apply gradient in SCSS file insted of HTML use @linear-gradient($name) mixin. It requires only name of gradient from $gradients map.

@include linear-gradient('primary_success');

// =>
background: #682cab;
background: linear-gradient(145deg, #8e51d2 10%, #68c279 80%);

Opacity

For each opacity value from $opacities map NightVue generates utility classnames with pattern .opacity-${value}:

$opacities: (
  0: 0%,
  1: 5%,
  2: 15%,
  3: 25%,
  4: 35%,
  5: 45%,
  6: 55%,
  7: 65%,
  8: 75%,
  9: 85%,
  10: 95%
);

.opacity-0  { opacity: 0 }
.opacity-1  { opacity: 0.05 }
.opacity-2  { opacity: 0.15 }
.opacity-3  { opacity: 0.25 }
...
.opacity-10 { opacity: 0.95 }

These classnames supports $breakpoints so you can easily manage opacity level on each specific breakpoint. Use template .opacity-${breakpoint}-{$value} to do that. For example this opacity will apply only on lg breakpoint:

@media screen and (min-width: 1280px) {
  .opacity-lg-5 {
    opacity: 0.45
  }
}

In case you need apply opacity in SCSS use opacity($level) function:

opacity: opacity(0);
// => opacity: 0;

opacity: opacity(1);
// => opacity: 0.05;

opacity: opacity(3);
// => opacity: 0.25;

opacity: opacity(7);
// => opacity: 0.65;

opacity: opacity(10);
// => opacity: 0.95;

Icons

To serve SVG icons NightVue uses SVG Sprite Loader.

Store your icons in src/assets/icons/library folder. We already included there 3 icons for example. There are many icon packs on internet, just pick whatever you like most and import icons in this folder.

├── src
│   ├── assets
│       ├── icons
│           ├── library
│               face.svg
│               lightbulb.svg
│               link.svg
│            index.js

Plugin automatically creates and injects in <body> client-side SVG sprite containing each icon from the folder above. Keep in mind that each icon will have an id based on its name. To include icon in HTML use <SvgIcon> component. It accepts properties icon and size.

<svg-icon icon="face" />

To set icon size define its size property. All icon sizes are stored in $icons map located in _variables.scss file:

$icon-sizes: (
  2xs: 0.625em, // 10px
  xs:  0.75em,  // 12px
  sm:  0.857em, // 14px
  md:  1em,     // 16px
  lg:  1.25em,  // 20px
  xl:  1.5em,   // 24px
  2xl: 2em,     // 32px
);

<svg-icon icon="face" size="2xs" />
<svg-icon icon="face" size="xs" />
<svg-icon icon="face" size="sm" />
<svg-icon icon="face" size="md" />
<svg-icon icon="face" size="lg" />
<svg-icon icon="face" size="xl" />
<svg-icon icon="face" size="2xl" />

Any other classname can be applied as usual:

<svg-icon
  icon="face"
  size="sm"
  class="m-2 fill-primary" />

<SvgIcon> component and plugin itself renders HTML in a widely used format <svg><use xlink:href="#id"></use></svg>. If you are not quite familiar with this feature read MDN Docs.

In case you prefer to set icon size in SCSS file, use @icon-size mixin. This mixin apply specific width and height to an element. If you apply this mixin to selector you can be pretty sure it will have passed dimensions no matter what and will not be compressed or stretched:

@include icon-size(sm);

// =>
width: 0.875em;
max-width: 0.875em;
min-width: 0.875em;
height: 0.875em;
max-height: 0.875em;
min-height: 0.875em;

We recomend to use predefined icon sizes from $icons map, but here you can pass whatever dimensions you want:

@include icon-size(18px, 34px);

// =>
width: 18px;
max-width: 18px;
min-width: 18px;
height: 34px;
max-height: 34px;
min-height: 34px;

Radius

NightVue uses Sass map $radiuses to store all variants of border-radius. By default it includes:

$radiuses: (
  'small':   4px,
  'base':    8px,
  'large':   20px,
  'circle':  100%,
  'zero':    0
);

For each value from this map NightVue generates set of utlity classnames to use in HTML. Pattern depends on which angle or angles you want to modify:

• .radius-${type} - for classnames that set property to all angles
• .radius-tl-${type} - for classnames that set property to top-left angle
• .radius-tr-${type} - for classnames that set property to top-right angle
• .radius-bl-${type} - for classnames that set property to bottom-left angle
• .radius-br-${type} - for classnames that set property to bottom-right angle
• .radius-t-${type} - for classnames that set property to top-left and top-right angles
• .radius-r-${type} - for classnames that set property to top-right and bottom-right angles
• .radius-b-${type} - for classnames that set property to bottom-left and bottom-right angles
• .radius-l-${type} - for classnames that set property to bottom-left and top-left angles

These classnames supports $breakpoints so you can easily manage border-radius type on each specific breakpoint. Use template .radius-${direction}-${breakpoint}-{$type} to do that. For example this element will have "large" border-radius only on sm breakpoint:

@media screen and (min-width: 768px) {
  .radius-b-sm-large {
     border-bottom-left-radius: 20px;
     border-bottom-right-radius: 20px;
   }
}

In case you prefer SCSS method, use radius($type) function. It requires type of border-radius you want to apply to an element:

border-radius: radius('small');
// => border-radius: 4px;

border-radius: radius('circle');
// => border-radius: 100%;

border-top-left-radius: radius('zero');
// => border-top-left-radius: 0;

Shadows

NightVue stores all types of box-shadows in $shadows map located in _variables.scss file. By default this map contains list of shadows based on Material methodology:

$shadows: (
  level-1: (0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24)),
  level-2: (0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23)),
  level-3: (0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23)),
  level-4: (0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22)),
  level-5: (0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22)),
);

Sure you can remove them and/or add your own. For example this website provides a large collection of beautiful box-shadows.

For each type from this map NightVue generates classnames using pattern .shadow-${type}:

.shadow-level-1 { box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24) }
.shadow-level-2 { box-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23) }
.shadow-level-3 { box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23) }
.shadow-level-4 { box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22) }
.shadow-level-5 { box-shadow: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22) }

In case you prefer to use them in SCSS file use shadow($type) function. It requires name of shadow as parameter:

box-shadow: shadow('level-1');
// => box-shadow: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);

box-shadow: shadow('level-2');
// => box-shadow: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);

box-shadow: shadow('level-3');
// => box-shadow: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);

box-shadow: shadow('level-4');
// => box-shadow: 0 14px 28px rgba(0,0,0,0.25), 0 10px 10px rgba(0,0,0,0.22);

box-shadow: shadow('level-5');
// => box-shadow: 0 19px 38px rgba(0,0,0,0.30), 0 15px 12px rgba(0,0,0,0.22);

Z-index

The Z-index property plays a crucial role in determining the behavior of web interfaces. NightVue offers a list of utility class names to position elements in the Z-axis. Since each project is unique and NightVue doesn't have pre-built components, we created a universal list of Z-indexes ranging from -1 to 12. However, this solution may not be suitable for everyone, so feel free to use any alternative you prefer.

Utility classnames uses format .z-plus-${value} for positive values and .z-minus-${value} for negatives. You can also determine start and end values in _zindex.scss file:

$zindex-start: -1;
$zindex-end:   12;

.z-minus-1 { z-index: -1 }
.z-0       { z-index: 0 }
.z-plus-1  { z-index: 1 }
.z-plus-2  { z-index: 2 }
.z-plus-3  { z-index: 3 }
.z-plus-4  { z-index: 4 }
.z-plus-5  { z-index: 5 }
.z-plus-6  { z-index: 6 }
.z-plus-7  { z-index: 7 }
.z-plus-8  { z-index: 8 }
.z-plus-9  { z-index: 9 }
.z-plus-10 { z-index: 10 }
.z-plus-11 { z-index: 11 }
.z-plus-12 { z-index: 12 }

Each of these classnames supports $breakpoints so you can easily manage z-index value on each specific breakpoint:

@media screen and (min-width: 1280px) {
  .z-lg-plus-12 {
     z-index: 12
  }
}

Transitions

NightVue provides set of most usable transition timings in web. They are stored in $transition-timings map located in _variables.scss file:

$transition-timings: (
  linear:       cubic-bezier(0, 0, 1, 1),
  ease:         cubic-bezier(0.25, 0.1, 0.25, 1),
  ease-in:      cubic-bezier(0.42, 0, 1, 1),
  ease-out:     cubic-bezier(0,0,0.58,1),
  ease-in-out:  cubic-bezier(0.42, 0, 0.58, 1),

  standard:     cubic-bezier(0.4, 0, 0.2, 1),
  emphasized:   cubic-bezier(0.0, 0, 0.2, 1),
  decelerated:  cubic-bezier(0.0, 0.0, 0.2, 1),
  accelerated:  cubic-bezier(0.4, 0.0, 1, 1),

  sharp:        cubic-bezier(0.4, 0, 0.6, 1) 
);

• First group are "standard" easing functions, that are already well described in MDN Docs
• Second group are easings from Material Design 2 guidelines. They have some similarities with previous group, although they are developed to be more "eye catchy" and each one serves some purpose
• Third group is where you can add your own easings. We added there "sharp" easing. This curve may be used for objects that may return to the screen at any time in fast way. Try cubic-bezier.com - it's a cool tool to create your own easings

Besides timing functions there is set of transition speed:

$transition-speed: (
  shortest: .15s,
  shorter:  .2s,
  short:    .25s,
  base:     .3s,
  slow:     .375s,
  slower:   .5s,
  lazy:     .75s,
);

NightVue generates classnames based on this maps to use them in HTML:

.timing-linear      { transition-timing-function: cubic-bezier(0, 0, 1, 1) }
.timing-ease        { transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1) }
.timing-ease-in     { transition-timing-function: cubic-bezier(0.42, 0, 1, 1) }
.timing-ease-out    { transition-timing-function: cubic-bezier(0,0,0.58,1) }
.timing-ease-in-out { transition-timing-function: cubic-bezier(0.42, 0, 0.58, 1) }
.timing-standard    { transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1) }
.timing-emphasized  { transition-timing-function: cubic-bezier(0.0, 0, 0.2, 1) }
.timing-decelerated { transition-timing-function: cubic-bezier(0.0, 0.0, 0.2, 1) }
.timing-sharp       { transition-timing-function: cubic-bezier(0.4, 0.0, 1, 1) }

.speed-shortest { transition-duration: .15s }
.speed-shorter  { transition-duration: .2s }
.speed-short    { transition-duration: .25s }
.speed-base     { transition-duration: .3s }
.speed-slow     { transition-duration: .375s }
.speed-slower   { transition-duration: .5s }
.speed-lazy     { transition-duration: .75s }

But we recomend to apply transitions in SCSS files. To do that use transition() and complex-transition() functions.

Function transition() returns transition based on $property, $speed, $timings and $delay params. Only first one param is required, others are by default base => .3s, ease and 0s. Function searches params in $transition-speed and $transition-timings maps, but you could pass whatever you want. We advice you to pass predefined $speed and $timing values tho. Here are some examples of usage:

transition: transition(transform);
// => transition: transform 0.3s cubic-bezier(0.25, 0.1, 0.25, 1);

transition: transition(opacity, short, ease-in);
// => transition: opacity 0.25s cubic-bezier(0.42, 0, 1, 1);

transition: transition(background-color, slow, emphasized);
// => transition: background-color 0.375s cubic-bezier(0, 0, 0.2, 1);

transition: transition(color, lazy, linear, 1s);
// => transition: color 0.75s cubic-bezier(0, 0, 1, 1) 1s;

transition: transition(box-shadow, 2s, cubic-bezier(.08,1.04,.82,-0.73));
// => transition: box-shadow 2s cubic-bezier(.08,1.04,.82,-0.73);

If you need apply many transitions at once we recomend to use complex-transition() function. It does basically the same as previous one, but you can write many transitions in clear and fancy way like this:

transition: complex-transition(
  transition(opacity, short, ease-in),
  transition(background-color, slow, emphasized),
  transition(color, lazy, linear, 1s),
);

// => transition: opacity 0.25s cubic-bezier(0.42, 0, 1, 1), background-color 0.375s cubic-bezier(0, 0, 0.2, 1), color 0.75s cubic-bezier(0, 0, 1, 1) 1s;

Animations

We have prepared a mixin that will make it easier for you to write and manage animations in your project. To include animation to selector use @animation($name, $duration, $delay, $count, $direction, $timing, $mode, $state) mixin, where:

• $name - name of animation.
• $duration - duration of animation. Could be predefined value from $transition-speed map located in _variables.scss file or any other value in seconds (s) or miliseconds (ms).
• $delay - specifies the amount of time in seconds (s) or miliseconds (ms) to wait from applying the animation to an element before beginning to perform the animation. By default it is equal to 0.
• $count - sets the number of times an animation sequence should be played before stopping. Default is 1 time.
• $direction - sets whether an animation should play forward, backward, or alternate back and forth between playing the sequence forward and backward. By default is set to "normal".
• $timing - sets how an animation progresses through the duration of each cycle. Could be predefined value from $transition-timings map located in _variables.scss file or any transition you want. Default is 'ease-in'.
• $mode - sets how a CSS animation applies styles to its target before and after its execution. Default is 'forwards'.
• $state - sets whether an animation is running or paused. By default it's 'running' state.

If you are not sure what each of parameters means check out MDN Docs for in-depth explanation.

Now let's take a look at example of usage:

@include animation(
  $name: spin,
  $duration: slow,
  $delay: 1s,
  $count: infinite,
  $direction: reverse,
  $timing: emphasized
  $state: paused
);

// =>
animation: spin 0.375s cubic-bezier(0, 0, 0.2, 1) 1s infinite reverse forwards paused;

Only first two parameters are required, so you can shorten mixin like that if your are okay with default values:

@include animation(
  $name: spin,
  $duration: 2s
);

// =>
animation: spin 2s cubic-bezier(0.42, 0, 1, 1) 0s 1 normal forwards;

Rotations

Often you need to rotate element by some degree. In CSS you may use transform: rotate() for that. NightVue provides some utility classnames to make it a little bit easier.

Most common rotation angles are: 0°, 90°, 180°, 270° and 360°.

For each angle NightVue generates classname with pattern .rotate-${direction}-${angle}, where direction might be minus or plus:

.rotate-minus-270  { transform: rotate(-270deg) }
.rotate-minus-180  { transform: rotate(-180deg) }
.rotate-minus-90   { transform: rotate(-90deg) }
.rotate-0          { transform: rotate(0deg) }
.rotate-plus-90    { transform: rotate(90deg) }
.rotate-plus-180   { transform: rotate(180deg) }
.rotate-plus-270   { transform: rotate(270deg) }
.rotate-plus-360   { transform: rotate(360deg) }

Utilities

In this section are collected small helpers which didn't find a place in the sections listed above. These classnames are described in _utilities.scss file:

.cursor-pointer       { cursor: pointer }
.cursor-help          { cursor: help }
.cursor-wait          { cursor: wait }
.cursor-move          { cursor: move }
.cursor-not-allowed   { cursor: not-allowed }
.cursor-context-menu  { cursor: context-menu }
.cursor-alias         { cursor: alias }

.no-select   { user-select: none }
.no-overflow { overflow: hidden }
.no-events   { pointer-events: none }

.visible     { visibility: visible }
.invisible   { visibility: hidden }