
源码
1. 代码解析
1.1 html 代码解析
- <div class="checkbox">
- <div class="inner" id="inner">
- <div class="toggle" id="toggle"></div>
- </div>
- </div>
最外层 checkbox, 是按钮的整体, inner 是ON下绿色框所占的区域, toggle 是能点击的 ON 和 OFF 区域.
1.2 css 代码解析设置 body 字体和背景色
- body{
- margin: 0;
- padding: 0;
- font-family: sans-serif;
- background: #dcdcdc;
- }
设置按钮的背景色, 位置, 圆形边框, 上下边框颜色和厚度
- .checkbox{
- position: absolute;
- top: 50%;
- left: 50%;
- transform: translate(-50%, -50%);
- width: 100px;
- height: 50px;
- border-radius: 25px;
- background: linear-gradient(0deg, #d8d8d8, #cccccc);
- border-top: 0.02em solid #ececec;
- border-bottom: 0.02em solid #ececec;
- }
设置 绿色底色区域 的上下左右位置, 以此确定宽度和高度, 注意, 这里没设宽度和高度, 默认是 auto
设置背景, 圆形边框, 阴影
- .checkbox .inner{
- position: absolute;
- /* 因为没设宽和高, 所以可以这样 */
- top: 10px;
- left: 10px;
- right: 10px;
- bottom: 10px;
- background: linear-gradient(0deg, #a5a5a5, #717171);
- border-radius: 20px;
- box-shadow: inset 0 0 15px rgba(0,0,0,.5);
- }
设置 ON OFF 按钮大小, 位置, 颜色, 背景, 阴影, 顶部和底部边框样式, 设置按钮上的动画时间为 0.5s
- .checkbox .inner .toggle{
- position: absolute;
- top: -3px;
- left: -3px;
- width: 36px;
- height: 36px;
- border-radius: 50%;
- background: linear-gradient(0deg, #ccc, #e4e4e4);
- box-shadow: 0 4px 6px rgba(0,0,0,.2);
- box-sizing: border-box;
- border-top: 0.04em solid #ececec;
- border-bottom: 0.01em solid #ececec;
- transition: 0.5s;
- }
设置 OFF 的样式,, 由上下左右的定位确定 宽和高, 设置背景, 圆形边框, line-height
用来设置字体垂直居中
- .checkbox .inner .toggle:before{
- content: "OFF";
- position: absolute;
- top: 4px;
- left: 4px;
- right: 4px;
- bottom: 4px;
- background: linear-gradient(0deg, #e4e4e4, #ccc);
- border-radius: 50%;
- text-align: center;
- font-size: 10px;
- line-height: 28px;
- color: #a9a9a9;
- }
设置 点击后按钮的字体, ON, 之所有没有写其他属性, 是因为其他属性都继承 checkbox .inner .toggle:before
- .checkbox .inner.active .toggle:before{
- content: "ON";
- color: #00d22d;
- }
当按钮被点击, 滑块右移, 并且更改背景色, 更改时间为 0.5s
- .checkbox .inner.active .toggle{
- left: 47px;
- }
- .checkbox .inner.active{
- background: linear-gradient(0deg, #00d22d, #158a00);
- }
1.3 javascript 代码解析
- <script>
- let inner = document.getElementById('inner');
- let toggle = inner.children[0];
- toggle.addEventListener('click', ()=>{
- if(inner.classList.contains('active')){
- inner.classList.remove('active');
- }else {
- inner.classList.add('active');
- }
- })
- </script>
- 首先获取到 inner 和 toggle, 一个背景色框, 一个圆形按钮
- 给按钮 toggle 注册点击事件, 点击 ON OFF 按钮才有效
- 当 inner 处于 active, 也就是 inner 元素包含 active 类, 那就移除, 如果不包含, 那就添加, 反正做一个相反的操作
- 当 inner 处于 active, toggle 会右移, inner 背景色会变换, 在 css中 设置
- 大功告成, 过程如下图


2. 源码
2.1 html 源码
- <!DOCTYPE html>
- <html lang="en">
- <head>
- <meta charset="UTF-8">
- <title>Title</title>
- <link rel="stylesheet" href="2020_12_24.css">
- </head>
- <body>
- <div class="checkbox">
- <div class="inner" id="inner">
- <div class="toggle" id="toggle"></div>
- </div>
- </div>
- <script>
- let inner = document.getElementById('inner');
- let toggle = inner.children[0];
- toggle.addEventListener('click', ()=>{
- if(inner.classList.contains('active')){
- inner.classList.remove('active');
- }else {
- inner.classList.add('active');
- }
- })
- </script>
- </body>
- </html>
2.2 css 源码
- body{
- margin: 0;
- padding: 0;
- font-family: sans-serif;
- background: #dcdcdc;
- }
- .checkbox{
- position: absolute;
- top: 50%;
- left: 50%;
- transform: translate(-50%, -50%);
- width: 100px;
- height: 50px;
- border-radius: 25px;
- background: linear-gradient(0deg, #d8d8d8, #cccccc);
- border-top: 0.02em solid #ececec;
- border-bottom: 0.02em solid #ececec;
- }
- .checkbox .inner{
- position: absolute;
- /* 因为没设宽和高, 所以可以这样 */
- top: 10px;
- left: 10px;
- right: 10px;
- bottom: 10px;
- background: linear-gradient(0deg, #a5a5a5, #717171);
- border-radius: 20px;
- box-shadow: inset 0 0 15px rgba(0,0,0,.5);
- }
- .checkbox .inner .toggle{
- position: absolute;
- top: -3px;
- left: -3px;
- width: 36px;
- height: 36px;
- border-radius: 50%;
- background: linear-gradient(0deg, #ccc, #e4e4e4);
- box-shadow: 0 4px 6px rgba(0,0,0,.2);
- box-sizing: border-box;
- border-top: 0.04em solid #ececec;
- border-bottom: 0.01em solid #ececec;
- transition: 0.5s;
- }
- .checkbox .inner .toggle:before{
- content: "OFF";
- position: absolute;
- top: 4px;
- left: 4px;
- right: 4px;
- bottom: 4px;
- background: linear-gradient(0deg, #e4e4e4, #ccc);
- border-radius: 50%;
- text-align: center;
- font-size: 10px;
- line-height: 28px;
- color: #a9a9a9;
- }
- .checkbox .inner.active .toggle:before{
- content: "ON";
- color: #00d22d;
- }
- .checkbox .inner.active .toggle{
- left: 47px;
- }
- .checkbox .inner.active{
- background: linear-gradient(0deg, #00d22d, #158a00);
- }
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