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60-[key]object Set method of defineproperty

2022-07-20 08:41:00 【longfei815】

60-[ a key ]Object.defineProperty Of set Method

perform set Conditions ： Just modify to name attribute , Just put return hinder val Change to a new value newVal

<!DOCTYPE html>
<html lang="en">
    <head>
        <title>60-[ a key ]Object.defineProperty Of set Method </title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-width, initial-scale=1">
        <!-- <link href="css/style.css" rel="stylesheet"> -->
        <script>
            let obj = {};
            Object.defineProperty(obj,'name',{
                get(){
                //  When to execute ？
                //  obtain name Property, execute the code here 
                console.log(' Yes get');

                // obj.name What is the value of ？？  Namely return The following value 
                return 'Vue'
                },
                set(newVal){ // newVal Receive the value after the equal sign 
                    console.log('--- Yes set Method ',newVal);
                    //  Just modify to name attribute , Just put return hinder val Change to a new value newVal
                }
            });
            console.log(obj.name);
            obj.name='Vue3'; //  Trigger set Method 
            console.log(obj.name);
        </script>
    </head>
    <body>
    
    </body>
</html>

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