vue双向绑定之简易版

<body>
<p id="p1">222</p>
<input type="text" id="inp"/>
</body>
<script>

    const Book = {
        name: ''
    }
    Object.defineProperty(Book, 'msg', {
        get() {
            return this.name
        },
        set(v) {
            Book.name = v;
            p.innerHTML = v;
            inp.value = v;
        }
    })

    var p = document.getElementById('p1')
    var inp = document.getElementById('inp')

    //input框写入数据
    inp.oninput = function (e) {
        Book.msg = e.target.value;goo
    }

</script>
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原文地址：https://www.cnblogs.com/qianqiang0703/p/14379303.html