每日CSS_仿苹果平滑开关按钮

时间 2020-12-24

标签 javascript css html java 字体动画 spa code orm htm 栏目 CSS 繁體版

原文原文链接

每日CSS_仿苹果平滑开关按钮

2020_12_24javascript

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, 是按钮的总体, inner 是ON下绿色框所占的区域, toggle 是能点击的 ON 和 OFF 区域.html

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, 以此肯定宽度和高度, 注意, 这里没设宽度和高度, 默认是 autojava

设置背景, 圆形边框, 阴影字体

.checkbox .inner{
  position: absolute;
  /* 由于没设宽和高, 因此能够这样 */
  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,, 由上下左右的定位肯定宽和高, 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, 之全部没有写其余属性, 是由于其余属性都继承 checkbox .inner .toggle:before

.checkbox .inner.active .toggle:before{
  content: "ON";
  color: #00d22d;
}

当按钮被点击, 滑块右移, 而且更改背景色, 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, 若是不包含, 那就添加, 反正作一个相反的操做
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, 过程以下图

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;
  /* 由于没设宽和高, 因此能够这样 */
  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);
}