test5.html

<!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>

        // a=1&b=2转换成a:1,b:2的正则？
        // let str = "a=1&b=2"

        // console.log("a=1&b=2".replace(/[=&]/g, function (match) {
        //     return match == '=' ? ":" : ","
        // }));


        console.log("{a:1,b:2}".replace(/[{}:,]/g, function (match) {
            return match == '{}' ? " " : "&"
        }));


        // console.log(str.match());


        // function stringify(obj) {
        //     let arr = []
        //     //for-in遍历对象的所有属性
        //     for (let key in obj) {
        //         let val = obj[key]//对象[属性名]=>属性值
        //         let str = key + '=' + val //a=1 
        //         arr.push(str);
        //     }
        //     return arr.join('&')
        // }


    </script>
</body>

</html>