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; }