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Copy path对象的扩展.html
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对象的扩展.html
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<!DOCTYPE html>
<html lang="zh">
<head>
<title>Document</title>
<meta charset="UTF-8" />
</head>
<body>
<script src="jquery-3.2.1.min.js" type="text/javascript" charset="utf-8"></script>
<script type="text/javascript">
let settings = {
name:'lisi',
age:6
};
let obj = {
age:18
}
//有配置走配置，没配置走默认
var o = Object.assign(settings,obj);
/*
有配置走配置，没配置走默认
$.extend(settings,obj);
var o2 = $.extend({},settings,obj);
var arr2 = $.extend([],arr);//浅拷贝
var arr2 = $.extend(true,[],arr); //深拷贝
$.extend 还可以通过它来扩展插件
$('#box').upload();
*/
//var o2 = $.extend({},settings,obj);
//console.log(o2)
// console.log(o);
//浅拷贝，拷贝一层
var arr = [1,2,3,4,[6]];
// var arr2 = Object.assign([],arr);
var arr2 = $.extend(true,[],arr); //深拷贝
arr2[4].push(5);
console.log(arr)
</script>
</body>
</html>