element ui 源码打包

element源码解析(4) – 样式

mixins

button

config

以BEM进行命名,
前缀为el,
元素分隔符__
修饰分割符–modifier
状态前缀都为is-

$namespace: 'el';
$element-separator: '__';
$modifier-separator: '--';
$state-prefix: 'is-';

function

selectorToString选择器转字符串取出头尾

@function selectorToString($selector) {
  $selector: inspect($selector);
  $selector: str-slice($selector, 2, -2);
  @return $selector;
}

containsModifier 是否包含修饰符

@function containsModifier($selector) {
  $selector: selectorToString($selector);

  @if str-index($selector, $modifier-separator) {
    @return true;
  } @else {
    @return false;
  }
}

containWhenFlag 状态标识

@function containWhenFlag($selector) {
  $selector: selectorToString($selector);

  @if str-index($selector, '.' + $state-prefix) {
    @return true
  } @else {
    @return false
  }
}

containPseudoClass 是否包含伪类

@function containPseudoClass($selector) {
  $selector: selectorToString($selector);

  @if str-index($selector, ':') {
    @return true
  } @else {
    @return false
  }
}

hitAllSpecialNestRule 任意修饰符 状态 伪类

@function hitAllSpecialNestRule($selector) {

  @return containsModifier($selector) or containWhenFlag($selector) or containPseudoClass($selector);
}

mixins

Break-points 断点响应

map-has-key($map,$key) 函数将返回一个布尔值。当 $map 中有这个 $key，则函数返回 true，否则返回 false。

map-get($map,$key) 函数的作用是根据 $key 参数，返回 $key 在 $map 中对应的 value 值。如果 $key 不存在 $map中，将返回 null 值。此函数包括两个参数：
$map：定义好的 map。
$key：需要遍历的 key。

inspect($query) Maps不能转换为纯CSS。作为变量的值或参数传递给CSS函数将会导致错误。使用inspect($query) 函数以产生输出字符串复制代码

@mixin res($key, $map: $--breakpoints) {
  // 循环断点Map，如果存在则返回
  @if map-has-key($map, $key) {
    @media only screen and #{inspect(map-get($map, $key))} {
      @content;
    }
  } @else {
    @warn "Undefeined points: `#{$map}`";
  }
}

/* Break-point
--------------------------*/
$--sm: 768px !default;
$--md: 992px !default;
$--lg: 1200px !default;
$--xl: 1920px !default;

$--breakpoints: (
  'xs' : (max-width: $--sm - 1),
  'sm' : (min-width: $--sm),
  'md' : (min-width: $--md),
  'lg' : (min-width: $--lg),
  'xl' : (min-width: $--xl)
);

$--breakpoints-spec: (
  'xs-only' : (max-width: $--sm - 1),
  'sm-and-up' : (min-width: $--sm),
  'sm-only': "(min-width: #{$--sm}) and (max-width: #{$--md - 1})",
  'sm-and-down': (max-width: $--md - 1),
  'md-and-up' : (min-width: $--md),
  'md-only': "(min-width: #{$--md}) and (max-width: #{$--lg - 1})",
  'md-and-down': (max-width: $--lg - 1),
  'lg-and-up' : (min-width: $--lg),
  'lg-only': "(min-width: #{$--lg}) and (max-width: #{$--xl - 1})",
  'lg-and-down': (max-width: $--xl - 1),
  'xl-only' : (min-width: $--xl),
);

Scrollbar

::-webkit-scrollbar 滚动条整体部分
::-webkit-scrollbar-thumb 滚动条里面的小方块，能向上向下移动（或往左往右移动，取决于是垂直滚动条还是水平滚动条）
::-webkit-scrollbar-track 滚动条的轨道（里面装有Thumb）
::-webkit-scrollbar-button 滚动条的轨道的两端按钮，允许通过点击微调小方块的位置。
::-webkit-scrollbar-track-piece 内层轨道，滚动条中间部分（除去）
::-webkit-scrollbar-corner 边角，即两个滚动条的交汇处
::-webkit-resizer 两个滚动条的交汇处上用于通过拖动调整元素大小的小控件

@mixin scroll-bar {
  $--scrollbar-thumb-background: #b4bccc;
  $--scrollbar-track-background: #fff;

  &::-webkit-scrollbar {
    z-index: 11;
    width: 6px;

    &:horizontal {
      height: 6px;
    }

    &-thumb {
      border-radius: 5px;
      width: 6px;
      background: $--scrollbar-thumb-background;
    }

    &-corner {
      background: $--scrollbar-track-background;
    }

    &-track {
      background: $--scrollbar-track-background;

      &-piece {
        background: $--scrollbar-track-background;
        width: 6px;
      }
    }
  }
}

Placeholder

@mixin placeholder {
  &::-webkit-input-placeholder {
    @content
  }

  &::-moz-placeholder {
    @content
  }

  &:-ms-input-placeholder {
    @content
  }
}

B

bem命名,命名空间+block

@mixin b($block) {
  $B: $namespace+'-'+$block !global;

  .#{$B} {
    @content;
  }
}

e

拿到元素

@mixin e($element) {
  // 假如传入input $E为input .zzr-radio__input,
  $E: $element !global;
  $selector: &;
  $currentSelector: "";
  @each $unit in $element {
    $currentSelector: #{$currentSelector + "." + $B + $element-separator + $unit + ","};
  }

  @if hitAllSpecialNestRule($selector) {
    @at-root {
      #{$selector} {
        #{$currentSelector} {
          @content;
        }
      }
    }
  } @else {
    @at-root {
      #{$currentSelector} {
        @content;
      }
    }
  }
}

configurable-m

@mixin configurable-m($modifier, $E-flag: false) {
  // 当前选择器
  $selector: &;
  $interpolation: '';//改变

  @if $E-flag {
    // 如果标志存在,则为元素分隔符__input+标志符,
    $interpolation: $element-separator + $E-flag;
  }

  @at-root {
  // 当前选择器,el-radio__input--modifier
    #{$selector} {
      .#{$B+$interpolation+$modifier-separator+$modifier} {
        @content;
      }
    }
  }
}

when

$state-prefix: ‘is-’;

@mixin when($state) {
  //@at-root指令可以使一个或多个规则被限定输出在文档的根层级上，而不是被嵌套在其父选择器下。
  @at-root {
    &.#{$state-prefix + $state} {
      @content;
    }
  }
}

utils

user-select

这个方法的兼容在webpack的项目中不必做,添加一个插件自然可以

@mixin utils-user-select($value) {
  -moz-user-select: $value;
  -webkit-user-select: $value;
  -ms-user-select: $value;
}

utils-clearfix

清除浮动的方法,如果使用vue基本上就不必使用浮动的方式去排版,因为vue必须ie8以上浏览器,早已支持flex,比浮动更好用

@mixin utils-clearfix {
  $selector: &;

  @at-root {
    #{$selector}::before,
    #{$selector}::after {
      display: table;
      content: "";
    }
    #{$selector}::after {
      clear: both
    }
  }
}

utils-vertical-center 垂直居中

当前选择器的伪类after插入,行内块,高度100%,垂直居中

@mixin utils-vertical-center {
  $selector: &;

  @at-root {
    #{$selector}::after {
      display: inline-block;
      content: "";
      height: 100%;
      vertical-align: middle
    }
  }
}

utils-ellipsis

溢出隐藏显示省略号(单行)

@mixin utils-ellipsis {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

common

popup

.v-modal-enter {
  animation: v-modal-in .2s ease;
}

.v-modal-leave {
  animation: v-modal-out .2s ease forwards;
}

@keyframes v-modal-in {
  0% {
    opacity: 0;
  }
  100% {
  }
}

@keyframes v-modal-out {
  0% {
  }
  100% {
    opacity: 0;
  }
}

.v-modal {
  position: fixed;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  opacity: $--popup-modal-opacity;
  background: $--popup-modal-background-color;
}

@include b(popup-parent) {
  @include m(hidden) {
    overflow: hidden;
  }
}

transition

基本上就是淡入淡出的透明度和放大缩小的scale

@import "var";

.fade-in-linear-enter-active,
.fade-in-linear-leave-active {
  transition: $--fade-linear-transition;
}
.fade-in-linear-enter,
.fade-in-linear-leave,
.fade-in-linear-leave-active {
  opacity: 0;
}

.el-fade-in-linear-enter-active,
.el-fade-in-linear-leave-active {
  transition: $--fade-linear-transition;
}
.el-fade-in-linear-enter,
.el-fade-in-linear-leave,
.el-fade-in-linear-leave-active {
  opacity: 0;
}

.el-fade-in-enter-active,
.el-fade-in-leave-active {
  transition: all .3s cubic-bezier(.55,0,.1,1);
}
.el-fade-in-enter,
.el-fade-in-leave-active {
  opacity: 0;
}

.el-zoom-in-center-enter-active,
.el-zoom-in-center-leave-active {
  transition: all .3s cubic-bezier(.55,0,.1,1);
}
.el-zoom-in-center-enter,
.el-zoom-in-center-leave-active {
  opacity: 0;
  transform: scaleX(0);
}

.el-zoom-in-top-enter-active,
.el-zoom-in-top-leave-active {
  opacity: 1;
  transform: scaleY(1);
  transition: $--md-fade-transition;
  transform-origin: center top;
}
.el-zoom-in-top-enter,
.el-zoom-in-top-leave-active {
  opacity: 0;
  transform: scaleY(0);
}

.el-zoom-in-bottom-enter-active,
.el-zoom-in-bottom-leave-active {
  opacity: 1;
  transform: scaleY(1);
  transition: $--md-fade-transition;
  transform-origin: center bottom;
}
.el-zoom-in-bottom-enter,
.el-zoom-in-bottom-leave-active {
  opacity: 0;
  transform: scaleY(0);
}

.el-zoom-in-left-enter-active,
.el-zoom-in-left-leave-active {
  opacity: 1;
  transform: scale(1, 1);
  transition: $--md-fade-transition;
  transform-origin: top left;
}
.el-zoom-in-left-enter,
.el-zoom-in-left-leave-active {
  opacity: 0;
  transform: scale(.45, .45);
}

.collapse-transition {
  transition: 0.3s height ease-in-out, 0.3s padding-top ease-in-out, 0.3s padding-bottom ease-in-out;
}
.horizontal-collapse-transition {
  transition: 0.3s width ease-in-out, 0.3s padding-left ease-in-out, 0.3s padding-right ease-in-out;
}

.el-list-enter-active,
.el-list-leave-active {
  transition: all 1s;
}
.el-list-enter, .el-list-leave-active {
  opacity: 0;
  transform: translateY(-30px);
}

.el-opacity-transition {
  transition: opacity .3s cubic-bezier(.55,0,.1,1);
}

var

Transition 过渡

过渡动画:全部,透明度,形变,边框,颜色

$--all-transition: all .3s cubic-bezier(.645,.045,.355,1) !default;
$--fade-transition: opacity 300ms cubic-bezier(0.23, 1, 0.32, 1) !default;
$--fade-linear-transition: opacity 200ms linear !default;
$--md-fade-transition: transform 300ms cubic-bezier(0.23, 1, 0.32, 1), opacity 300ms cubic-bezier(0.23, 1, 0.32, 1) !default;
$--border-transition-base: border-color .2s cubic-bezier(.645,.045,.355,1) !default;
$--color-transition-base: color .2s cubic-bezier(.645,.045,.355,1) !default;

Color 颜色

主色一种,辅助色四种,成功/警告/危险/信息,常用色黑白
1.主色有亮化程度有九级
2.辅助色亮化程度有2级
3.文字颜色4种级别:主要,正常,次要,占位
4.边框颜色4中级别:基础,三种亮化等级

/// color|1|Brand Color|0
$--color-primary: #409EFF !default;
/// color|1|Background Color|4
$--color-white: #FFFFFF !default;
/// color|1|Background Color|4
$--color-black: #000000 !default;
$--color-primary-light-1: mix($--color-white, $--color-primary, 10%) !default; /* 53a8ff */
$--color-primary-light-2: mix($--color-white, $--color-primary, 20%) !default; /* 66b1ff */
$--color-primary-light-3: mix($--color-white, $--color-primary, 30%) !default; /* 79bbff */
$--color-primary-light-4: mix($--color-white, $--color-primary, 40%) !default; /* 8cc5ff */
$--color-primary-light-5: mix($--color-white, $--color-primary, 50%) !default; /* a0cfff */
$--color-primary-light-6: mix($--color-white, $--color-primary, 60%) !default; /* b3d8ff */
$--color-primary-light-7: mix($--color-white, $--color-primary, 70%) !default; /* c6e2ff */
$--color-primary-light-8: mix($--color-white, $--color-primary, 80%) !default; /* d9ecff */
$--color-primary-light-9: mix($--color-white, $--color-primary, 90%) !default; /* ecf5ff */
/// color|1|Functional Color|1
$--color-success: #67C23A !default;
/// color|1|Functional Color|1
$--color-warning: #E6A23C !default;
/// color|1|Functional Color|1
$--color-danger: #F56C6C !default;
/// color|1|Functional Color|1
$--color-info: #909399 !default;

$--color-success-light: mix($--color-white, $--color-success, 80%) !default;
$--color-warning-light: mix($--color-white, $--color-warning, 80%) !default;
$--color-danger-light: mix($--color-white, $--color-danger, 80%) !default;
$--color-info-light: mix($--color-white, $--color-info, 80%) !default;

$--color-success-lighter: mix($--color-white, $--color-success, 90%) !default;
$--color-warning-lighter: mix($--color-white, $--color-warning, 90%) !default;
$--color-danger-lighter: mix($--color-white, $--color-danger, 90%) !default;
$--color-info-lighter: mix($--color-white, $--color-info, 90%) !default;
/// color|1|Font Color|2
$--color-text-primary: #303133 !default;
/// color|1|Font Color|2
$--color-text-regular: #606266 !default;
/// color|1|Font Color|2
$--color-text-secondary: #909399 !default;
/// color|1|Font Color|2
$--color-text-placeholder: #C0C4CC !default;
/// color|1|Border Color|3
$--border-color-base: #DCDFE6 !default;
/// color|1|Border Color|3
$--border-color-light: #E4E7ED !default;
/// color|1|Border Color|3
$--border-color-lighter: #EBEEF5 !default;
/// color|1|Border Color|3
$--border-color-extra-light: #F2F6FC !default;

Background 背景色

/// color|1|Background Color|4
$--background-color-base: #F5F7FA !default;

Link 链接色

链接有两种,默认主色,其它二级主色

$--link-color: $--color-primary-light-2 !default;
$--link-hover-color: $--color-primary !default;

Border 边框

宽度,样式,颜色,圆角

$--border-width-base: 1px !default;
$--border-style-base: solid !default;
$--border-color-hover: $--color-text-placeholder !default;
$--border-base: $--border-width-base $--border-style-base $--border-color-base !default;
/// borderRadius|1|Radius|0
$--border-radius-base: 4px !default;
/// borderRadius|1|Radius|0
$--border-radius-small: 2px !default;
/// borderRadius|1|Radius|0
$--border-radius-circle: 100% !default;
/// borderRadius|1|Radius|0
$--border-radius-zero: 0 !default;

Box-shadow 阴影

三种类型:基础阴影和轻重阴影

/// boxShadow|1|Shadow|1
$--box-shadow-base: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .04) !default;
// boxShadow|1|Shadow|1
$--box-shadow-dark: 0 2px 4px rgba(0, 0, 0, .12), 0 0 6px rgba(0, 0, 0, .12) !default;
/// boxShadow|1|Shadow|1
$--box-shadow-light: 0 2px 12px 0 rgba(0, 0, 0, 0.1) !default;

Typography 段落

字体大小六个层级,20-12,默认14
字体行高为16/24
字重为500/100
禁用色#bbb

$--font-path: 'fonts' !default;
$--font-display: 'auto' !default;
/// fontSize|1|Font Size|0
$--font-size-extra-large: 20px !default;
/// fontSize|1|Font Size|0
$--font-size-large: 18px !default;
/// fontSize|1|Font Size|0
$--font-size-medium: 16px !default;
/// fontSize|1|Font Size|0
$--font-size-base: 14px !default;
/// fontSize|1|Font Size|0
$--font-size-small: 13px !default;
/// fontSize|1|Font Size|0
$--font-size-extra-small: 12px !default;
/// fontWeight|1|Font Weight|1
$--font-weight-primary: 500 !default;
/// fontWeight|1|Font Weight|1
$--font-weight-secondary: 100 !default;
/// fontLineHeight|1|Line Height|2
$--font-line-height-primary: 24px !default;
/// fontLineHeight|1|Line Height|2
$--font-line-height-secondary: 16px !default;
$--font-color-disabled-base: #bbb !default;
/* Size
-------------------------- */
$--size-base: 14px !default;

z-index 层级

三种层级,默认1
顶级1000
弹窗2000

$--index-normal: 1 !default;
$--index-top: 1000 !default;
$--index-popper: 2000 !default;

Disable base 禁用

背景禁用色
文字禁用色
边框禁用色

$--disabled-fill-base: $--background-color-base !default;
$--disabled-color-base: $--color-text-placeholder !default;
$--disabled-border-base: $--border-color-light !default;

Icon

默认icon颜色

$--icon-color: #666 !default;
$--icon-color-base: $--color-info !default;