CSS常用 Less 公共样式封装

喜欢ヅ旅行 2022-06-03 01:41 626阅读 0赞

/------------------------------------- ├ 布局 ┆ └------------------------------------/
    
    // 盒子宽高
    .size(@w, @h) { width: @w; height: @h; }
    
    // 最小尺寸, 兼容IE6
    .min-width(@min-w) { min-width: @min-w; _width: @min-w; }
    .min-height(@min-h) { min-height: @min-h; _height: @min-h; }
    
    // 内联块级元素, 兼容IE6
    .dib() { display: inline-block; *display: inline; *zoom: 1; }
    
    // 固定定位, 兼容IE6
    .fixed() { position: fixed; _position: absolute; *zoom: 1; }
    
    // 统一盒模型
    .border-box() {
    *, *:after, *:before { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; }
    }
    
    // 文字图片居中
    .center(text-x) { text-align: center; }
    .center(text-y) { display: table-cell; vertical-align: middle; }
    
    // 块级元素水平居中
    .center(auto-x) { display: block; margin-left: auto; margin-right: auto; }
    
    // 居中, 不确定尺寸, 不兼容 IE6
    .center(unknown) { position: absolute; top: 0; left: 0; right: 0; bottom: 0; margin: auto; }
    .center(unknown-x) { position: absolute; left: 0; right: 0; margin-left: auto; margin-right: auto; }
    .center(unknown-y) { position: absolute; top: 0; bottom: 0; margin-top: auto; margin-bottom: auto; }
    
    // 居中, 确定尺寸, 兼容 IE6
    .center(known, @w, @h) {
    .size(@w, @h);
    position: absolute; top: 50%; left: 50%; margin-top: -(@w / 2); margin-left: -(@h / 2);
    }
    .center(known-x, @w) {
    width: @w;
    position: absolute; left: 50%; margin-left: -(@h / 2);
    }
    .center(known-y, @h) {
    height: @h;
    position: absolute; top: 50%; margin-top: -(@w / 2);
    }
    
    // 居中, CSS3 平移方式, 兼容性不行
    .center(translate) { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); }
    
    // 居中, Flex 方式, 兼容性不行
    .center(flex) { display: flex; align-items: center; justify-content: center; }
    
    // 多个子项布局
    .list(float, @w: 25%) { float: left; width: @w; }
    .list(inline, @w: 25%) { .dib(); width: @w; }
    .list(flex) { flex: 1; }
    
    // 遮罩层, 全屏遮罩、区域遮罩
    .over-screen(fixed) { .fixed(); top: 0; left: 0; right: 0; bottom: 0; }
    .over-screen(absolute) { position: absolute; top: 0; left: 0; right: 0; bottom: 0; }
    
    // 容器宽高比固定
    // 100* 1/1 = 100%
    // 100* 3/4 = 75%
    .fixed-ratio(@padding-top: 100%) {
    position: relative; width: 100%; height: 0; padding-top: @padding-top;
    img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
    }
    
    // 扩展点击区域
    .extend-click() {
    position: relative;
    &:before { content: ''; position: absolute; top: -10px; left: -10px; right: -10px; bottom: -10px; }
    }
    
    // 定宽居中页面布局
    .layout-page(@width: 1200px) { width: @width; margin-left: auto; margin-right: auto; }
    
    // 侧边栏
    // 主要区域：overflow: hidden; margin-left: xx; margin-right: xx;
    .sidebar(left, @width) { position: absolute; top: 0; left: 0; width: @width; }
    .sidebar(right, @width) { position: absolute; top: 0; right: 0; width: @width; }
    
    /------------------------------------- ├ 字体 ┆ └------------------------------------/
    
    // 字体大小
    .fz(@fz) { font-size: @fz; }
    
    // 字体大小与行高
    .fz(@fz, @lh) { font-size: @fz; line-height: @lh; }
    
    // 字体大小、行高、高度
    .fz(@fz, @h, @lh: @h) { font-size: @fz; height: @h; line-height: @lh; }
    
    // 行高与高度
    .lh(@h, @lh: @h) { height: @h; line-height: @lh; }
    
    // 字体颜色, 包括链接与非链接
    .color(@color) { color: @color;}
    
    // 字体颜色 + 自身 Hover
    .color(@color, @hovercolor) {
    color: @color;
    &:hover { color: @hovercolor; }
    }
    
    // 字体颜色 + 链接 Hover
    .color(@color, @acolor, @hovercolor) {
    color: @color;
    a {
    color: @acolor;
    &:hover { color: @hovercolor; }
    }
    }
    
    // 正常字体样式
    .normal-font() { font-weight: normal; font-style: normal; }
    
    // 辅助性文字（灰色）
    .assist-font(@color: #b0b0b0, @fz: 14px) { color: @color; font-size: @fz; }
    
    // 禁止换行, 文本溢出省略号显示 (一行)
    .ellipsis() {
    white-space: normal; word-wrap: break-word; word-break: break-all;
    -o-text-overflow: ellipsis; -ms-text-overflow: ellipsis; text-overflow:ellipsis; overflow:hidden;
    }
    
    // 文本溢出省略号显示 (多行)
    // 只支持 webkit 浏览器, 解决方案：高度 = 行高*行数
    // height: 90px; line-height: 30px; -webkit-line-clamp: 3;
    .ellipsis-mult(@n: 3) {
    display: -webkit-box; -webkit-box-orient: vertical;-webkit-line-clamp: @n; word-break: break-all;
    -o-text-overflow: ellipsis; -ms-text-overflow: ellipsis; text-overflow:ellipsis; overflow: hidden;
    }
    
    // 书写模式：牌匾从右至左水平单行排版效果、文笺从右至左、从上至下排版效果
    .retext(x) { direction: rtl; unicode-bidi: bidi-override; }
    .retext(y) { writing-mode: tb-rl; writing-mode: vertical-rl; }
    
    // 文字透明
    .transparent-text() { font: 0/0 serif; text-shadow: none; color: transparent; }
    
    // 文字隐藏（常用于SEO优化）
    //
    
    xx
    
    
    .hidden-text() { text-indent : -9999px; overflow: hidden; text-align: left; }
    // 文字外发光效果
    .glow-text(@r: 10px, @color: gold) { text-shadow: 0 0 @r @color; }
    
    /------------------------------------- ├ 图像 ┆ └------------------------------------/
    
    // 用 max-width 来防止图片撑破容器
    .max-img() { display: block; max-width: 100%; height: auto; }
    
    // 2x 3x 背景图片
    .bg-image(@url) {
    background-image: url("@url + '@2x.png'");
    @media (-webkit-min-device-pixel-ratio: 3), (min-device-pixel-ratio: 3) {
    background-image: url("@url + '@3x.png'");
    }
    }
    
    // 全屏大图背景
    .fullscreen-bg(@url) {
    width: 100vw;
    height: 100vh;
    background: url(@url) no-repeat 50% 50%;
    background-size: cover;
    }
    
    // 滤镜: 将彩色照片显示为黑白照片
    .grayscale() {
    filter: grayscale(100%);
    -webkit-filter: grayscale(100%);
    -moz-filter: grayscale(100%);
    -ms-filter: grayscale(100%);
    -o-filter: grayscale(100%);
    }
    
    /------------------------------------- ├ 动效 ┆ └------------------------------------/
    
    // 链接默认无下划线，hover后有下划线的样式
    .hover-link() {
    text-decoration: none;
    &:hover { text-decoration: underline; }
    }
    
    // 将链接变成默认的文字样式
    .unstyled-link() {
    color: inherit;
    cursor: inherit;
    text-decoration: inherit;
    &:active, &:focus { outline: none; }
    }
    
    // 盒子阴影
    // box-shadow: 水平阴影的位置, 垂直阴影的位置, 模糊距离, 阴影的大小, 阴影的颜色, 阴影开始方向（默认是从里往外，设置inset就是从外往里）;
    // box-shadow: h-shadow v-shadow blur spread color inset;
    .box-shadow() {
    box-shadow: 0px 14px 26px 0px rgba(0, 0, 0, 0.1);
    }
    
    // 盒子 Hover
    .box-hover() {
    // box-shadow: 0px 1px 2px 0px rgba(84, 107, 107, .4);
    transition: all .2s linear;
    &:hover {
    box-shadow: 0 15px 30px rgba(0, 0, 0, .1);
    transform: translate3d(0, -2px, 0);
    }
    }
    
    .box-hover2() {
    transition: transform .5s ease;
    &:hover {
    transform: translateX(10px);
    }
    }
    
    // 三维闪动 bug 处理
    .transform-fix() { -webkit-backface-visibility: hidden; -webkit-transform-style: preserve-3d; }
    
    // Animation
    .ani(@name, @time: 1s, @ease: ease-in-out, @fillmode: forwards) {
    animation-name: @name;
    animation-duration: @time;
    animation-timing-function: @ease;
    animation-fill-mode: @fillmode;
    }
    
    /------------------------------------- ├ 功能 ┆ └------------------------------------/
    
    // 浮动, 兼容 IE6
    .fl() { float: left; *display: inline; _display:inline; }
    .fr() { float: right; *display: inline; _display:inline; }
    
    // 清除浮动
    .clearfix() {
    *zoom: 1;
    &:after { display: block; clear: both; content: ''; visibility: hidden; height: 0; }
    }
    .clearfix(table) {
    *zoom: 1;
    &:before, &:after { content: " "; display: table; clear: both; }
    }
    
    // 禁止文本被选择
    .user-select() { -webkit-user-select: none; -moz-user-select: none; -ms-user-select: none; user-select: none; }
    
    // 隐藏鼠标手势
    .hide-cursor() { cursor: none !important; }
    
    // 鼠标禁用样式，但仍然可以触发事件
    // 
    
    .disabled() { cursor: not-allowed; }
    
    // 禁用元素事件
    // 1. 阻止任何点击动作的执行
    // 2. 使链接显示为默认光标(cursor:default)
    // 3. 阻止触发hover和active状态
    // 4. 阻止JavaScript点击事件的触发
    .pointer-events() { pointer-events: none; }
    
    // 模糊
    .blur(@blur: 10px) {
    filter: blur(@blur);
    -webkit-filter: blur(@blur);
    -moz-filter: blur(@blur);
    -o-filter: blur(@blur);
    -ms-filter: blur(@blur);
    filter: progid:DXImageTransform.Microsoft.Blur(PixelRadius='@{blur}');
    *zoom: 1;
    }
    
    // 透明度, 兼容 IE8
    .opacity(@opacity: 20) { opacity: @opacity / 100; filter: alpha(opacity=@opacity); }
    
    // 用伪类来显示打印时 a 标签的链接
    .print-link() {
    @media print {
    a[href]:after { content: " (" attr(href) ") "; }
    }
    }
    
    // 隔行换色
    .zebra-lists(odd, @color) {
    &.odd {
    >li:nth-child(odd) { background-color: @color; }
    }
    }
    .zebra-lists(even, @color) {
    &.even {
    >li:nth-child(even) { background: green; }
    }
    }
    
    // 首字下沉
    .first-letter(@font-size: 6em) {
    &::first-letter{
    float: left;
    line-height: 1;
    font-size: @font-size;
    }
    }
    
    // 特殊标记段落第一行
    .first-line() {
    &::first-line{
    color: red
    }
    }
    
    // 美化选中文本
    .beauty-select() {
    &::selection{
    color: #fff;
    background-color: #6bc30d;
    text-shadow: none;
    }
    }
    
    // 美化占位符 placeholder 样式
    .beauty-placeholder(@fz, @color: #999, @align: left) {
    &:-moz-placeholder { font-size: @fz; color: @color; text-align: @align; }
    &:-ms-input-placeholder { font-size: @fz; color: @color; text-align: @align; }
    &::-webkit-input-placeholder { font-size: @fz; color: @color; text-align: @align; }
    }
    
    // 美化占位符 placeholder 样式（自定义属性和值）
    .beauty-placeholder(custom, @property, @value) {
    &:-moz-placeholder { @{property}: @value; }
    &:-ms-input-placeholder { @{property}: @value; }
    &::-webkit-input-placeholder { @{property}: @value; }
    }
    
    /------------------------------------- ├ 图形 ┆ └------------------------------------/
    
    // 三角形
    .triangle(@width: 4px,@color: #000) {
    display: inline-block;
    width: 0;
    height: 0;
    vertical-align: middle;
    border-top: @width solid @color;
    border-left: @width solid transparent;
    border-right: @width solid transparent;
    }
    
    // 三角形箭头气泡效果, IE6-7 无表现
    .arrow(top, @w: 10px, @color, @x: 50%) {
    position: relative;
    &:before { position: absolute; bottom: 100%; left: @x; content: " "; height: 0; width: 0; pointer-events: none; border-style: solid; border-color: transparent; border-bottom-color: @color; border-width: unit(@w, px); @margin: -@w; margin-left: unit(@margin, px); }
    }
    .arrow(right, @w: 10px, @color, @y: 50%) {
    position: relative;
    &:before { position: absolute; left: 100%; top: @y; content: " "; height: 0; width: 0; pointer-events: none; border-style: solid; border-color: transparent; border-left-color: @color; border-width: unit(@w, px); @margin: -@w; margin-top: unit(@margin, px); }
    }
    .arrow(bottom, @w: 10px, @color, @x: 50%) {
    position: relative;
    &:before { position: absolute; top: 100%; left: @x; content: " "; height: 0; width: 0; pointer-events: none; border-style: solid; border-color: transparent; border-top-color: @color; border-width: unit(@w, px); @margin: -@w; margin-left: unit(@margin, px); }
    }
    .arrow(left, @w: 10px, @color, @y: 50%) {
    position: relative;
    &:before { position: absolute; right: 100%; top: @y; content: " "; height: 0; width: 0; pointer-events: none; border-style: solid; border-color: transparent; border-right-color: @color; border-width: unit(@w, px); @margin: -@w; margin-top: unit(@margin, px); }
    }
    
    // 三角形箭头气泡效果, 带边框
    .arrow-with-border(top, @w: 10px, @color, @border-w: 1px, @border-color, @x: 50%) {
    position: relative;
    &:before, &:after { bottom: 100%; left: @x; content: " "; height: 0; width: 0; position: absolute; pointer-events: none; border-style: solid; border-color: transparent; }
    &:after { border-bottom-color: @color; border-width: unit(@w, px); @margin: -@w; margin-left: unit(@margin, px); }
    &:before { border-bottom-color: @border-color; @arrbo: @w+@border-w; border-width: unit(@arrbo, px); @margin-bo: -@arrbo; margin-left: unit(@margin-bo, px); }
    }
    .arrow-with-border(bottom, @w: 10px, @color, @border-w: 1px, @border-color, @x: 50%) {
    position: relative;
    &:before, &:after { top: 100%; left: @x; content: " "; height: 0; width: 0; position: absolute; pointer-events: none; border-style: solid; border-color: transparent; }
    &:after { border-top-color: @color; border-width: unit(@w, px); @margin: -@w; margin-left: unit(@margin, px); }
    &:before { border-top-color: @border-color; @arrbo: @w+@border-w; border-width: unit(@arrbo, px); @margin-bo: -@arrbo; margin-left: unit(@margin-bo, px); }
    }
    .arrow-with-border(left, @w: 10px, @color, @border-w: 1px, @border-color, @y: 50%) {
    position: relative;
    &:before, &:after { top: @y; right: 100%; content: " "; height: 0; width: 0; position: absolute; pointer-events: none; border-style: solid; border-color: transparent; }
    &:after { border-right-color: @color; border-width: unit(@w, px); @margin: -@w; margin-top: unit(@margin, px); }
    &:before { border-right-color: @border-color; @arrbo: @w+@border-w; border-width: unit(@arrbo, px); @margin-bo: -@arrbo; margin-top: unit(@margin-bo, px); }
    }
    .arrow-with-border(right, @w: 10px, @color, @border-w: 1px, @border-color, @y: 50%) {
    position: relative;
    &:before, &:after { top: @y; left: 100%; content: " "; height: 0; width: 0; position: absolute; pointer-events: none; border-style: solid; border-color: transparent; }
    &:after { border-left-color: @color; border-width: unit(@w, px); @margin: -@w; margin-top: unit(@margin, px); }
    &:before { border-left-color: @border-color; @arrbo: @w+@border-w; border-width: unit(@arrbo, px); @margin-bo: -@arrbo; margin-top: unit(@margin-bo, px); }
    }
    
    /------------------------------------- ├ 组件 ┆ └------------------------------------/
    
    // 吸顶导航
    .fix-header(@h: 70px) {
    .fixed();
    top: 0;
    left: 0;
    width: 100%;
    height: @h;
    z-index: 1000;
    // background-color: rgba(256, 256, 256, .92);
    // border-bottom: 1px solid rgba(7, 17, 27, 0.1);
    // box-shadow: 0px 0px 20px rgba(0,0,0,0.2);
    }
    
    // 吸底导航
    .fix-header(@h: 70px) {
    .fixed();
    left: 0;
    bottom: 0;
    width: 100%;
    height: @h;
    z-index: 1000;
    }
    
    // 输入框
    .input-text() {
    display: block;
    width: 100%;
    padding: 4px 8px;
    font-size: 14px;
    line-height: 1.42858;
    color: #333;
    border: 1px solid #ddd;
    background-color: #fff;
    border-radius: 3px;
    }
    
    // 分割线
    // |/-
    .separator() {
    margin: 0 10px;
    color: #999;
    font-size: 14px;
    }
    
    // 分割线 / (面包屑导航)
    .separator2() {
    &:before {
    padding: 0 5px;
    color: #ccc;
    content: "/\00a0";
    }
    }
    
    //
    
    
    // 支付宝：我也是有底线的
    .hr() {
    height: 1px;
    margin: 10px 0;
    border: 0;
    clear: both;
    background-color: #e2e2e2;
    }
    // 改装的 fieldset
    //
    
    返璞归真
    
    .fieldset() {
    border-color: #d2d2d2;
    border-width: 1px 0 0;
    border-style: solid;
    legend {
    padding: 0 20px;
    text-align: center;
    font-size: 20px;
    font-weight: 300;
    }
    }
    // 引用区块（模仿 Layui）
    //
    
    Lorem ipsum dolor sit amet.
    
    .blockquote() {
    margin-bottom: 10px;
    padding: 15px;
    line-height: 22px;
    border-left: 5px solid #009688;
    border-radius: 0 2px 2px 0;
    background-color: #f2f2f2;
    }
    // 徽章 (椭圆、小圆点)
    // 10
    .badge(...) {
    position: relative;
    display: inline-block;
    font-size: 12px;
    color: #fff;
    background-color: #FF5722;
    }
    .badge(ellipse) {
    min-width: 8px;
    height: 18px;
    padding: 2px 6px;
    text-align: center;
    line-height: 18px;
    border-radius: 9px;
    }
    .badge(dot) {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    }
    
    // 关闭按钮
    // ×
    .close() {
    position: relative;
    -webkit-appearance: none;
    padding: 0;
    cursor: pointer;
    background: 0 0;
    border: 0;
    font-size: 20px;
    font-weight: 700;
    line-height: 1;
    color: #000;
    text-shadow: 0 1px 0 #fff;
    filter: alpha(opacity=20);
    opacity: .2;
    &:hover {
    color: #000;
    text-decoration: none;
    cursor: pointer;
    filter: alpha(opacity=50);
    opacity: .5;
    }
    &:before {
    content: '';
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    }
    }
    
    // 1 像素边框问题
    .onepx(...) {
    position: relative;
    &:after {
    content: '';
    display: block;
    position: absolute;
    left: 0;
    width: 100%;
    border-top: 1px solid rgba(7, 17, 27, 0.1);
    transform: scaleY(0.5);
    }
    }
    .onepx(top) { &:after { top: 0; } }
    .onepx(bottom) { &:after { bottom: 0; } }
    .onepx-easy(top, @color: #ccc) { box-shadow: inset 0px -1px 1px -1px @color; }
    .onepx-easy(bottom, @color: #ccc) { box-shadow: inset 0px 1px 1px -1px @color; }

作者：白小明  
来源：掘    金  
转载：[https://juejin.im/post/5a31f53f51882555cc41deda][https_juejin.im_post_5a31f53f51882555cc41deda]

[https_juejin.im_post_5a31f53f51882555cc41deda]: https://juejin.im/post/5a31f53f51882555cc41deda