请老师检查代码，另外请教一下怎么实现函数节流

来源：3-13 编程练习

子衿设计

2022-03-10 18:23:50

<!DOCTYPE html>
<html>

<head>
    <meta charset="utf-8">
    <title>Document</title>
    <style>
        div {
            width: 300px;
            margin: 20px 0;
            line-height: 30px;
            background: yellowgreen;
        }
    </style>
</head>

<body>
    <button id="start">开始</button>
    <button id="stop">停止</button>
    <div id="box"></div>
    <script>
        const startBtn = document.getElementById('start')
        const stopBtn = document.getElementById('stop')
        const box = document.getElementById('box')
        var show = {
            content: "Hello World",
            timer: null,
            start: function () {
                // 在此补充代码
                // 如何实现函数节流？
                // clearInterval(timer);
                startBtn.addEventListener('click', () => {
                    timer = setInterval(() => {
                        // console.log(this);
                        box.innerHTML += this.content;
                    }, 1000);
                }, false);
            },
            stop: function () {
                // 在此补充代码
                stopBtn.addEventListener('click', () => {
                    clearInterval(timer);
                }, false);
            },
        }
        // 在此补充代码
        show.start();
        show.stop();
    </script>
</body>

</html>

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