ES6 assign

原创

徐同保的博客 2022-06-30 17:17:44 博主文章分类：web前端 ©著作权

文章标签 assign html 目标对象 jquery 文章分类 JavaScript 前端开发

©著作权归作者所有：来自51CTO博客作者徐同保的博客的原创作品，请联系作者获取转载授权，否则将追究法律责任

<!DOCTYPE html>
<html >
<head>
<meta charset="UTF-8">   
<meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1"/>  
<meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" />       
<title>ES6 assign</title>
<style type="text/css">
html {height: 100%;}
body {width: 200px;height: 100%;position: relative;padding: 0;margin: 0;}
</style>
</head>
<body>
<script src="https://cdn.bootcss.com/jquery/1.9.0/jquery.js"></script>
<script>
    var name = "zhangsan";
    var password = "1111111";
    var obj = {
       name,
       password,
       arr: [1, 2, 3, 4],
       sayName() {
          console.log(this.name);
       }
    };
    var obj1 = {
       age: 20,
       name: 'xutongbao'
    };

    //花括号叫目标对象，后面的obj、obj1是源对象。对象合并是指：将源对象里面的属性添加到目标对象中去，若两者的属性名有冲突，后面的将会覆盖前面的
    var nObj = Object.assign({}, obj, obj1); 
    console.log(nObj);  //{name: "xutongbao", password: "1111111", arr: Array(4), sayName: ƒ, age: 20}
    nObj.arr.push(5);
    console.log(obj.arr); //[1, 2, 3, 4, 5]  此处说明assign是浅拷贝

    var arr11 = Object.assign([1,2,3], [4,5]);
    console.log(arr11); //[4,5,3]  对象是根据属性名来对应，数组是根据索引号来对应
</script>
</body>
</html>