详解对象增删改查
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
class Person{}
let p=new Person();
//增加
p.name="cyg";
//p["name"]="liwen";
p.say=function()
{
console.log("cyg");
}
/*p["say"]=function()
{
console.log("liwen1");
}*/
console.log(p);
</script>
</body>
</html>
在这里插入图片描述
删除：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
class Person{}
let p = new Person();
p["name"] = "zs";
p["say"] = function(){
console.log("hello world");
}
//删除
delete p["say"];
console.log(p);
</script>
</body>
在这里插入图片描述
修改;
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
class Person{}
let p = new Person();
p["name"] = "zs";
p["say"] = function(){
console.log("hello world");
}
//修改:
p["name"]="liwen";
p["say"]=function()
{
console.log("liwen1");
}
console.log(p);
</script>
</body>
</html>
在这里插入图片描述
查询：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
<script type="text/javascript">
class Person{}
let p = new Person();
p["name"] = "zs";
p["say"] = function(){
console.log("hello world");
}
//查询
console.log(p["name"]);
console.log(p["say"]);
</script>
</body>
</html>
在这里插入图片描述
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原始发表：2020/09/11 ，如有侵权请联系 cloudcommunity@tencent.com 删除
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