js习题(浅拷贝的方法)

it2023-06-21  69

<!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> </body> </html> <script> var obj = { num: 12, age: 18, msg: { sum: 'kke' } } var son = {} //第一种方法 /* Object.assign(son, obj) console.log(son); son.msg.sum = 20 console.log(obj); */ //第二种方法 function copy(newobj, oldobj) { //遍历对象 for (var k in oldobj) { newobj[k] = oldobj[k] } } copy(son, obj) console.log(son); son.msg.sum = 20 console.log(obj); </script>
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