我的CSS(3)工具类库(less版)，你会喜欢的

浏览数：59 / 时间：2015年06月09日

今天给大家分享我个人使用的Less版的CSS(3)工具类库，欢迎补充~！

用法很简单，使用 @import 将该类库引入到需要使用的less文件中即可，就好像页面中引入了jQuery一样，接下来就可以使用它的方法和函数了，示例：

/*!
 * index.less
 */
@charset "utf-8";
@import "lib/utils.less"; 

.main { .Clearfix(); }
.notice li { .Text-ellipsis(); }
.comment { .Text-break(); }

utils.less, 欢迎补充：

@charset "utf-8";
           
// author:Jim
// version:3.0 | 2014.04.22
// based on veryLess            http://veryless.org/


// 清除(闭合)浮动
.Clearfix () { 
    *zoom: 1;
    &:before, 
    &:after {
        display: table;
        content: "";

      /*
       * Fixes Opera/contenteditable bug:
       * http://nicolasgallagher.com/micro-clearfix-hack/#comment-36952
       */
      line-height: 0;
    }
    &:after {
        clear: both;
    }
}


// inline-block
.Inline-block () { 
    /* 如果有必要可在其父元素上应用样式vertical-align:top; */
    display:inline-block; 
    *display:inline; 
    *zoom:1;
} 


// 文字隐藏
.Text-hidden () {
    /* 
     * 魔鬼的text-indent-9999px:
     * http://prezi.com/t8yyirefxn2u/text-indent-9999px/ 
     */
    text-indent: 100%;

    white-space: nowrap; /* 强制不换行 */
    overflow: hidden;
}

.Text-ellipsis () {
    /* 
     *文字溢出隐藏显示省略号，需要用在与文字最近的一个block|inline-block的祖先元素上(ie6中该元素的width需要显性的声明且不能为auto,100%是可行的) 
     */
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

// 文字(强制)折行
.Text-break () {
    word-wrap:break-word;
    word-break:break-all;
}


// 自定义字体
.Font-face(@path, @font-name){
    @font-face{
        font-family: @font-name;
        src: url(‘@{path}/@{font-name}.eot‘);
        src: url(‘@{path}/@{font-name}.eot?#iefix‘) format(‘embedded-opentype‘),
             url(‘@{path}/@{font-name}.woff‘) format(‘woff‘),
             url(‘@{path}/@{font-name}.ttf‘)  format(‘truetype‘),
             url(‘@{path}/@{font-name}.svg#svgFontName‘) format(‘svg‘);
    }
}


// (整体)透明
.Opacity (@a: 0.3) {
    @aa: (@a*100); 
    opacity: @a;
    filter: ~"Alpha(Opacity=@{aa})"; /* ie5-8 */
    *zoom: 1; /* 应用滤镜的元素必须拥有layout */
}
// 背景透明
.Background-rgba (@r: 0, @g: 0, @b: 0, @a: 0.3) {
    @c: rgba(@r, @g, @b, @a);
    @cc: argb(@c);
    background-color:@c;
    filter:~"progid:DXImageTransform.Microsoft.Gradient(GradientType=0,StartColorStr=‘@{cc}‘,EndColorStr=‘@{cc}‘)";
    *zoom: 1;
}


// 圆角
.Border-radius (@a: 3px) {
    -webkit-border-radius: @a;
       -moz-border-radius: @a;
            border-radius: @a;
}
.Border-top-left-radius(@radius: 5px) {
  -webkit-border-top-left-radius: @radius;
      -moz-border-radius-topleft: @radius;
          border-top-left-radius: @radius;
}
.Border-top-right-radius(@radius: 5px) {
  -webkit-border-top-right-radius: @radius;
      -moz-border-radius-topright: @radius;
          border-top-right-radius: @radius;
}
.Border-bottom-right-radius(@radius: 5px) {
  -webkit-border-bottom-right-radius: @radius;
      -moz-border-radius-bottomright: @radius;
          border-bottom-right-radius: @radius;
}
.Border-bottom-left-radius(@radius: 5px) {
  -webkit-border-bottom-left-radius: @radius;
      -moz-border-radius-bottomleft: @radius;
          border-bottom-left-radius: @radius;
}

// 阴影
.Box-shadow ( @a: 0 1px 3px rgba(0,0,0,.3); ) {
    -webkit-box-shadow: @a;
       -moz-box-shadow: @a;
            box-shadow: @a;
}


// 渐变
.Linear-gradient (@a: #ffa600; @b: #fe9200) {
    filter: ~‘progid:DXImageTransform.Microsoft.gradient(GradientType=0, startColorstr="@{a}", endColorstr="@{b}")‘;
    background-image: -webkit-linear-gradient(top,@a, @b);
    background-image: -moz-linear-gradient(top,@a, @b);
    background-image: -ms-linear-gradient(top,@a  0,@b 100%);
    background-image: -o-linear-gradient(top,@a, @b);
    background-image: linear-gradient(top,@a, @b);
}
// 禁用渐变
.Linear-gradientDisable () {
    background-image: none;
　　filter: progid:DXImageTransform.Microsoft.gradient(enabled=false);  /* 禁用渐变 */
}


.Box-sizing ( @a: content-box ) {
    -webkit-box-sizing: @a;
       -moz-box-sizing: @a;
            box-sizing: @a;
}

// 利用边框制作小三角
.Triangle (@type: bottom, @x: 10px, @c: #999, @y: @x) {

  display: block;
  width:0; height:0; overflow:hidden;

  // 这里有意利用IE6对dashed渲染缺陷解决IE6不支持transparent的问题 
  @transparent: @y dashed transparent; 
  // 该特殊边框的大小必须小于其他边框大小的四倍，否则IE6会有问题 
  @special: @x solid @c;

  .border();

  .border () when (@type = bottom) {
    border-bottom: @special;
    border-left: @transparent;
    border-right: @transparent;
  }
  .border () when (@type = top) {
    border-top: @special;
    border-left: @transparent;
    border-right: @transparent;
  }
  .border () when (@type = left) {
    border-left: @special;
    border-top: @transparent;
    border-bottom: @transparent;
  }
  .border () when (@type = right) {
    border-right: @special;
    border-top: @transparent;
    border-bottom: @transparent;
  }

}

// 鼠标经过旋转
.Rotate (@d: 180deg, @s: .3s) {
    -webkit-transition: @s ease-in;
    -moz-transition: @s ease-in;
    -o-transition: @s ease-in;
    transition: @s ease-in;

    &:hover, &-hover{
        -webkit-transform: rotate(@d);
        -moz-transform: rotate(@d);
        -ms-transform: rotate(0); 
        -o-transform: rotate(@d);
        filter: progid:DXImageTransform.Microsoft.BasicImage(rotation=1);
        -ms-filter: ~"progid:DXImageTransform.Microsoft.BasicImage(rotation=1)";
        transform: rotate(@d);
    }
}

// 去色(不兼容低版本Safari、Opera和某些firefox), 一般用于哀悼日)
.Grayscale() { 
    -webkit-filter: grayscale(100%);   
    -webkit-filter: grayscale(1);    /* Chrome 19+ & Safari 6+ */
       -moz-filter: grayscale(100%); 
        -ms-filter: grayscale(100%); 
         -o-filter: grayscale(100%); 
            filter: grayscale(100%);

            /* firefox 3.5+，慎用！存在性能问题 */ 
            filter: url(‘data:image/svg+xml;utf8,<svg xmlns=\‘http://www.w3.org/2000/svg\‘><filter id=\‘grayscale\‘><feColorMatrix type=\‘matrix\‘ values=\‘0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0.3333 0.3333 0.3333 0 0 0 0 0 1 0\‘/></filter></svg>#grayscale‘);           
            filter: gray; /* IE6~9 */ 
}
.Max-height(@h, @pd: 0) {

    @Hnum: unit(@h);
    @PDnum: unit(@pd);

    max-height: @h;
    _height:~"expression( (this.clientHeight-@{PDnum})>@{Hnum}? @{Hnum} : (this.clientHeight-@{PDnum}) )";
    _overflow: hidden;
    _zoom: 1;

    /* clientHeight = height + padding;
     * offsetHeight = height + padding+border;
     */
}
.Max-width(@h, @pd: 0) {

    @Hnum: unit(@h);
    @PDnum: unit(@pd);

    max-width: @h;
    _width:~"expression( (this.clientWidth-@{PDnum})>@{Hnum}? @{Hnum} : (this.clientWidth-@{PDnum}) )";
    _overflow: hidden;
    _zoom: 1;

}
.Min-height(@h, @pd: 0) {

    @Hnum: unit(@h);
    @PDnum: unit(@pd);

    min-height: @h;
    _height:~"expression( (this.clientHeight-@{PDnum})<@{Hnum}? @{Hnum} : (this.clientHeight-@{PDnum}) )";
    _overflow: hidden;
    _zoom: 1;

}

// 一个老外的博客中看到的：
.Min-height2(@h) {
  min-height: @h;
  height: auto !important; /*all browsers except ie6 will respect the !important flag*/
  height: @h; /*Should have the same value as the min height above*/
}

.Min-width(@h, @pd: 0) {

    @Hnum: unit(@h);
    @PDnum: unit(@pd);

    min-width: @h;
    _width:~"expression( (this.clientWidth-@{PDnum})<@{Hnum}? @{Hnum} : (this.clientWidth-@{PDnum}) )";
    _overflow: hidden;
    _zoom: 1;

}



.Clip (@t: 0px, @r: 0px, @b: 0px, @l: 0px) {
    position:absolute; clip:rect; /* 矩形剪裁只能作用于position:absolute的元素上 */
    clip: rect(@t @r @b @l); /* IE6, IE7 */
    clip: rect(@t, @r, @b, @l);
}

// 解决Retina屏幕下的图像显示
.Retina-image(@file-1x, @file-2x, @width-1x, @height-1x) {
  background-image: url("@{file-1x}");

  @media
  only screen and (-webkit-min-device-pixel-ratio: 2),
  only screen and (   min--moz-device-pixel-ratio: 2),
  only screen and (     -o-min-device-pixel-ratio: 2/1),
  only screen and (        min-device-pixel-ratio: 2),
  only screen and (                min-resolution: 192dpi),
  only screen and (                min-resolution: 2dppx) {
    background-image: url("@{file-2x}");
    background-size: @width-1x @height-1x;
  }
}



.Image-set (@a1, @a2) {    
    /* 
     *解决Retina屏幕下的图像显示，淘宝首页的css sprite解决方案
     *image-set是CSS4的属性，"safari6"和“chrome21”支持
     *如果浏览器支持image-set，普通显屏，此时浏览器会选择image-set中的@1x背景图像; Retina屏幕，此时浏览器会选择image-set中的@2x背景图像;
     *扩展阅读：http://www.w3cplus.com/css/safari-6-and-chrome-21-add-image-set-to-support-retina-images.html
     */
    background: url(@a1);
    background-image: -webkit-image-set(url(@a1) 1x, url(@a2) 2x);
    background-image: -moz-image-set(url(@a1) 1x,url(@a2) 2x);
    background-image: -ms-image-set(url(@a1) 1x,url(@a2) 2x);
    background-image: -o-image-set(url(@a1) 1x,url(@a2) 2x);
    background-repeat: no-repeat;
}

.User-select(@select: auto) {
  -webkit-user-select: @select;
     -moz-user-select: @select;
      -ms-user-select: @select;
       -o-user-select: @select;
          user-select: @select;
}


// 图片水平垂直居中: http://blog.moocss.com/code-snippets/html-css-code-snippets/1390.html
.Image-center(@w, @h: @w){

  @width: unit(@w);
  @height: unit(@h);
  @_fontsize: (@height * 0.873);

  width: ~‘@{width}px‘;
  height: ~‘@{height}px‘;
  overflow: hidden;
  display: table-cell;
  vertical-align: middle;
  text-align: center;
  
  *display: block;//IE hack
  *font: ~"@{_fontsize}px/1em Arial";
  
  img{
    display: inline;
    max-height: 100%;
    max-width: 100%;
    vertical-align: middle;
  }
}

// CSS3 "栅格化"(flexbox)：http://www.qingdou.me/2066.html
.Display-box() {
  display: -webkit-box;  /* Chrome 4+, Safari 3.1, iOS Safari 3.2+ */
  display: -moz-box;     /* Firefox 17- */
  display: -webkit-flex; /* Chrome 21+, Safari 6.1+, iOS Safari 7+, Opera 15/16 */
  display: -moz-flex;    /* Firefox 18+ */
  display: -ms-flexbox;  /* IE 10 */
  display: flex;         /* Chrome 29+, Firefox 22+, IE 11+, Opera 12.1/17/18, Android 4.4+ */
}
.Box-flex(@a) {
  -webkit-box-flex: @a;
  -moz-box-flex: @a;
  box-flex: @a;
}