jQuery 版“元素拖拽改变大小”原型，底层原理为对鼠标事件中的鼠标位置进行计算，将计算后的数值重新付给dom的宽高即可。其实可以修改成原生js的。
当然有很多插件可以做到，更为方便。但这个代码不长，倒是可以临时用用。
不是我写的，是https://www.cnblogs.com/yelaiju/archive/2012/02/16/2354602.html
<!DOCTYPE html PUBLIC"-//W3C//DTD XHTML 1.0 Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>jQuery 版“元素拖拽改变大小”原型</title>
<!--引用jquery-->
<script
type="text/javascript"
src="../../../js/jquery-1.4.4.min.js"
></script>
<script type="text/javascript">
$(function () {
//绑定需要拖拽改变大小的元素对象
bindResize(document.getElementById("test"));
console.log(document)
});
function bindResize(el) {
//初始化参数
var els = el.style,
//鼠标的 X 和 Y 轴坐标
x = (y = 0);
//邪恶的食指
$(el).mousedown(function (e) {
//按下元素后，计算当前鼠标与对象计算后的坐标
(x = e.clientX - el.offsetWidth), (y = e.clientY - el.offsetHeight);
//在支持 setCapture 做些东东
el.setCapture
? //捕捉焦点
(el.setCapture(),
//设置事件
(el.onmousemove = function (ev) {
mouseMove(ev || event);
}),
(el.onmouseup = mouseUp))
: //绑定事件
$(el).bind("mousemove", mouseMove).bind("mouseup", mouseUp);
//防止默认事件发生
e.preventDefault();
});
//移动事件
function mouseMove(e) {
//宇宙超级无敌运算中...
(els.width = e.clientX - x + "px"),
(els.height = e.clientY - y + "px");
}
//停止事件
function mouseUp() {
//在支持 releaseCapture 做些东东
el.releaseCapture
? //释放焦点
(el.releaseCapture(),
//移除事件
(el.onmousemove = el.onmouseup = null))
: //卸载事件
$(el)
.unbind("mousemove", mouseMove)
.unbind("mouseup", mouseUp);
}
}
</script>
<style type="text/css">
#test {
position: absolute;
top: 0;
left: 0;
width: 400px;
height: 300px;
background: #f1f1f1;
text-align: center;
line-height: 100px;
border: 1px solid #ccc;
cursor: se-resize;
}
</style>
</head>
<body>
<div id="test">这是内容</div>
</body>
</html>
备注：
<template>
<div class="wrap" @mouseup="handleUp">
<div id="tuozhuai" class="tuozhuai" @mousedown="handleDown"></div>
</div>
</template>
<script>
export default {
name: 'pdf',
data () {
return {
}
},
methods: {
handleUp () {
var tuozhuaiNode = document.getElementById('tuozhuai')
tuozhuaiNode.onmousemove = null
},
handleDown (edown) {
var tuozhuaiNode = document.getElementById('tuozhuai')
var xNum = edown.clientX - tuozhuaiNode.offsetWidth
tuozhuaiNode.onmousemove = function (eMove) {
tuozhuaiNode.style.width = eMove.clientX - xNum + 'px'
}
}
}
}
</script>
<style lang="scss" scoped>
.wrap {
width: 100%;
height: 100%;
background-color: pink;
}
.tuozhuai {
width: 100px;
height: 500px;
border: 1px solid blue;
cursor: e-resize;
}
</style>
