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<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>深拷贝的两种方法</title>
</head>
<body>
<script>
//JSON.stringify 简单粗暴
var origin_data = { a: 1, b: 2, c: [1, 2, 3] }
var copy_data = JSON.parse(JSON.stringify(origin_data))
origin_data.a = 3;
origin_data.b = 4;
origin_data.c[0] = '呵呵哒';
console.log(origin_data)
console.log(copy_data)
// 递归
function deepClone(source) {
const targetObj = source.constructor === Array ? [] : {}; // 判断复制的目标是数组还是对象
for (let keys in source) { // 遍历目标
if (source[keys] && typeof source[keys] === 'object') { // 如果值是对象或者数组，就递归一下
targetObj[keys] = deepClone(source[keys]);
} else { // 如果不是，就直接赋值
targetObj[keys] = source[keys];
}
}
return targetObj;
}
var origin_data = { a: 1, b: 2, c: [1, 2, 3] }
var copy_data = deepClone(origin_data)
origin_data.a = 3;
origin_data.b = 4;
origin_data.c[0] = '呵呵哒';
console.log(origin_data);
console.log(copy_data);
</script>
</body>
</html>
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