封裝爲了jq插件，如下
drag.js
;(function ($) {
$.fn.dragDiv = function (options) {
var def = {
maxW:600,// 可伸縮的最大寬度
minW:50// 可伸縮的最小寬度
};// 參數默認值
var opts = $.extend(def,options);// 擴展參數，使用默認值或傳參
//設置最大/最小寬度
var max_width = opts.maxW,
min_width = opts.minW;
//記錄鼠標相對left盒子x軸位置
var mouse_x = 0;
var left = $(this).parent('div')[0];
//鼠標移動事件
function mouseMove(e) {
var e = e || window.event;
var left_width = e.clientX - mouse_x;// 可伸縮div的寬度
left_width = left_width < min_width ? min_width : left_width;
left_width = left_width > max_width ? max_width : left_width;
left.style.width = left_width + "px";
}
//終止事件
function mouseUp() {
document.onmousemove = null;
document.onmouseup = null;
}
$(this).mousedown(function (e) {
var e = e || window.event;
//阻止默認事件
e.preventDefault();
mouse_x = e.clientX - left.offsetWidth;// 可伸縮div距離左側邊界的寬度
document.onmousemove = function () {
mouseMove()
};
document.onmouseup = function () {
mouseUp()
};
})
}
})(jQuery)
html文件
<!doctype html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport"
content="width=device-width, user-scalable=no, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>鼠標進行伸縮div</title>
<style>
* {
margin: 0;
padding: 0;
box-sizing: border-box;
}
.dragdom {
background: #cccccc;
width: 100px;
height: 600px;
margin: 0 auto;
position: relative;
}
.dragdom .drag {
border: 1px transparent solid;
width: 0px;
height: 100%;
position: absolute;
top: 0;
right: 0;
cursor: e-resize;
}
</style>
</head>
<body>
<div class="dragdom"><div class="drag"></div></div>
</body>
</html>
<script type="text/javascript" src="./jquery.min.js"></script>
<script type="text/javascript" src="./drag.js"></script>
<script>
$(function () {
$('.drag').dragDiv();
})
</script>