两栏布局左右拖拽效果实现方案
CSS方式实现
第一种利用的css的方式实现，利用浏览器非 overflow:auto 元素 设置 resize 可以拉伸的特性实现无JavaScript的分栏宽度控制。
webkit浏览器下滚动条可以自定义，其中resize区域大小就是scrollbar的大小，于是，我们可以将整个拉伸区域变成和容器一样高
红色的就是扩大后的区域
不推荐使用css的方式实现，毕竟兼容性并不好。在火狐上表现不佳。
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>AA-drag</title>
<style>
* {
padding: 0;
margin: 0;
}
.fl-container {
width: 100%;
height: 100vh;
overflow: hidden;
}
.fl-resize-bar,
.fl-resize-bar::-webkit-scrollbar {
width: 400px;
}
.fl-left {
position: relative;
float: left;
height: 100vh;
background: pink;
}
.fl-right {
box-sizing: border-box;
overflow-x: hidden;
height: 100vh;
}
.fl-cont-right {
height: 200vh;
}
.fl-resize-bar {
height: inherit;
resize: horizontal;
cursor: ew-resize;
cursor: col-resize;
opacity: 0;
overflow: scroll;
}
.fl-resize-bar::-webkit-scrollbar {
width: 400px;
height: inherit;
}
.fl-cont-left {
position: absolute;
top: 0;
right: 4px; /* 拖拽线的间距 */
bottom: 0;
left: 0;
overflow-x: hidden;
background: #fff;
}
.fl-resize-line {
position: absolute;
right: 1px;
top: 0;
bottom: 0;
border-right: 2px solid #bbb;
pointer-events: none;
}
.fl-resize-bar:hover ~ .fl-resize-line,
.fl-resize-bar:active ~ .fl-resize-line {
border-right: 2px dashed skyblue;
}
/* Firefox只有下面一小块区域可以拉伸 */
@supports (-moz-user-select: none) {
.fl-resize-bar:hover ~ .fl-resize-line,
.fl-resize-bar:active ~ .fl-resize-line {
border-right: 2px solid #bbb;
}
.fl-resize-bar:hover ~ .fl-resize-line::after,
.fl-resize-bar:active ~ .fl-resize-line::after {
content: '';
position: absolute;
width: 16px;
height: 16px;
bottom: 0;
right: -8px;
background: url(https://www.zhangxinxu.com/study/201903/css-idea/resize.svg);
background-size: 100% 100%;
z-index: 1;
}
}
</style>
</head>
<body>
<div class="fl-container">
<div class="fl-left">
<div class="fl-resize-bar"></div>
<div class="fl-resize-line"></div>
<div class="fl-cont-left">左侧内容</div>
</div>
<div class="fl-right">
<div class="fl-cont-right">
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</div>
</div>
</div>
</body>
</html>
使用js方式实现
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>AA-drag</title>
<style>
* {
padding: 0;
margin: 0;
}
#left,
#right,
#middle {
height: 100vh;
position: absolute;
}
#left {
width: 300px;
background: #ccc;
}
#middle {
width: 5px;
background: #666;
left: 300px;
}
#middle:hover {
cursor: col-resize;
}
#right {
right: 0;
background: #ccc;
left: 305px;
width: auto;
}
</style>
</head>
<body>
<div id="left">左侧内容</div>
<div id="middle"></div>
<div id="right">右侧内容</div>
</body>
</html>
<script>
function getEle(id) {
return document.getElementById(id);
}
window.onload = function () {
let left = getEle('left');
let right = getEle('right');
let middle = getEle('middle');
let middleWidth = 5;
middle.onmousedown = function (e) {
var disX = (e || event).clientX;
middle.left = middle.offsetLeft;
document.onmousemove = function (e) {
let middleLeft = middle.left + ((e || event).clientX - disX);
let maxWidth = document.body.clientWidth;
middleLeft < 0 && (middleLeft = 0);
middleLeft > maxWidth && (middleLeft = maxWidth);
middle.style.left = left.style.width = middleLeft + 'px';
right.style.width = maxWidth - middleLeft - middleWidth + 'px';
right.style.left = middleLeft + middleWidth + 'px';
return false;
};
document.onmouseup = function () {
document.onmousemove = null;
document.onmouseup = null;
middle.releaseCapture && middle.releaseCapture();
};
middle.setCapture && middle.setCapture();
return false;
};
};
</script>
