JavaScript_code_snippets/deepCopy.html at master · dendoink/JavaScript_code_snippets · GitHub

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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<script>
    function deepCopy(targetObj, newObj) {
        newObj = newObj || {}
        for (let property in targetObj) {
            if (typeof targetObj[property] === 'object') {
                newObj[property] = (targetObj[property].constructor === Array) ? [] : {};
                deepCopy(targetObj[property], newObj[property])
            } else {
                newObj[property] = targetObj[property]
            }
        }
        return newObj
    }

    function test() {
        console.log('test');
        return false
    }
    let target = {
        a: 1,
        b: { k: 1, n: 2 },
        c: [{ 1: 2 }, { 3: 4 }, [{ 1: 1, 2: 2 }]],
        t: test
    }

    let result = deepCopy(target)
    result.t()
</script>

</html>