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in Technique[技术] by (71.8m points)

vue复制数组中的数据

vue复制数组中的数据

相关代码

arr:[
        [{a:1}],
]
this.arr.push(this.arr[0]);

this.arr[0][0].a = 2;

console.log(this.arr[1][0].a);

我想要复制一份数组中的数据,push到原来的数组,但是不希望把原来的响应式也复制进去。希望console出的结果是 1


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1 Reply

0 votes
by (71.8m points)

简单处理一下,详细的可以看下深浅拷贝的知识。

this.arr.push([{...arr[0][0]}]);

附上简单的深拷贝

const deepCopy = obj => {
  if (obj === null) return null;
  if (typeof obj !== "object") return obj;
  if (obj instanceof RegExp) return new RegExp(obj);
  if (obj instanceof Date) return new Date(obj);
  let _obj = new obj.constructor();
  for (let key in obj) {
    _obj[key] = deepCopy(obj[key]);
  }
  return _obj;
};

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