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clipPath.html
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clipPath.html
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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no"
/>
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>微信网页悬浮窗交互效果的web实现</title>
</head>
<style>
html,
body {
width: 100vw;
height: 100vh;
overflow: hidden;
margin: 0;
}
h1 {
margin: 0
}
.page1 {
width: 100%;
height: 100%;
padding: 20px;
box-sizing: border-box;
position: absolute;
left: 0;
top: 0;
z-index: -1;
background-color: #00b8ff;
overflow: hidden;
}
.page2 {
width: 100%;
height: 100%;
padding: 20px;
box-sizing: border-box;
background-color: rgb(118, 145, 39);
transition: all .2s;
clip-path: circle(200vh at 50vw 50vh);
}
.icon-link {
width: 64px;
height: 64px;
background: url(https://www.zhangxinxu.com/study/201806/icon-link.png);
background-size: contain;
border-radius: 50%;
position: fixed;
right: 10px;
bottom: 200px;
opacity: 0;
line-height: 64px;
color: #fff;
text-align: center;
}
</style>
<body>
<div class="page1">
<p>list</p>
<p>list</p>
<p>list</p>
<p>效果实现的关键是页面收缩到悬浮按钮中。使用的是CSS3 clip-path属性。</p>
<p>
如果两层都是绝对定位的话，当上面一页收起来的时候，部分浏览器底部会出现滚动条。。。设置了mate标签以及html,body,overflow:hidden，width:100%;都还是没法解决。。。。 后来我把下一层用绝对定位,同时设置z-index=-1，上一层用文档流，收缩的时候直接用margin-left，就不会出现底部的滚动条了
</p>
</div>
<div id="pageLink" class="page2">
<h1>微信网页悬浮窗交互效果的web实现</h1>
<p>如果浏览器访问，请打开开发者工具，然后使用移动端模式。</p>
<p>向右滑动页面查看效果……</p>
<p>关于技术实现
<a href="https://www.yangyuetao.cn/" target="_blank">访问这里</a>。</p>
</div>
<!-- 悬浮的按钮 -->
<a href="javascript:" id="iconLink" class="icon-link"></a>
<script>
let elPageLink = document.getElementById('pageLink');
let elIconLink = document.getElementById('iconLink');
let widthPageLink = elPageLink.clientWidth;
let widthIconLink = elIconLink.clientWidth;//图标尺寸
let heightIconLink = elIconLink.clientHeight;
let data = {
touching: false,//标识
translateX: 0,
centerX: elIconLink.offsetLeft + widthIconLink / 2,//收缩中心
centerY: elIconLink.offsetTop + heightIconLink / 2
};
const setStyle = (obj, json) => {//批量设置style方法
for (var i in json) {
obj.style[i] = json[i];
}
}
//开始触摸
elPageLink.addEventListener('touchstart', (e) => {
let touch = e.touches[0];
// console.log('1111111')
data.x1 = touch.pageX;
data.translateX = 0;
data.touching = true;
});
//游走
elPageLink.addEventListener('touchmove', (e) => {
let touch = e.touches[0];
// console.log('222222')
if (!data.touching) {
return
}
data.x2 = touch.pageX;
data.translateX = data.x2 - data.x1;
if (data.translateX < 0) {//防止移动过量
data.translateX = 0;
}
setStyle(elPageLink, {
marginLeft: data.translateX + 'px'
})
setStyle(elIconLink, {
opacity: Math.log2(1 + data.translateX / widthPageLink)
})
});
//触摸结束
elPageLink.addEventListener('touchend', (e) => {
let touch = e.changedTouches[0];
// console.log(333333)
if (!data.touching) {
return
}
data.x2 = touch.pageX;
data.translateX = data.x2 - data.x1;
if (data.translateX < widthPageLink / 3) {//小于三分之一视为未移动
data.translateX = 0;
setStyle(elPageLink, {
marginLeft: data.translateX + 'px'
})
setStyle(elIconLink, {
opacity: Math.log2(1 + data.translateX / widthPageLink)
})
} else {
setStyle(elPageLink, {
marginLeft: '0',
clipPath: 'circle(' + heightIconLink / 2 + 'px at ' + (data.centerX) + 'px ' + data.centerY + 'px)'
})
setStyle(elIconLink, {
opacity: 1
})
}
data.touching = false;
});
//点击还原
elIconLink.addEventListener('click', (e) => {
setStyle(elPageLink, {
clipPath: 'circle(100vh at 50vw 50vh)'
})
setStyle(elIconLink, {
opacity: 0
})
})
</script>
</body>
</html>