javascript copy Object.assign () method

Object.assign () method is used to enumerate all the attribute values ​​are copied from one or more source object to the target object. It will return to the target object. Syntax Object.assign (target, ... sources);

parameter:

target: the target object

Sources: Source Object Returns:

*target

Example copies run:

const object1 = {
  a: 1,
  b: 2,
  c: 3
};
const object2 = Object.assign({c: 4, d: 5}, object1);
console.log(object2);
输出：{c: 3, d: 5, a: 1, b: 2}
复制代码

c: 4 = "c: 3 If the target object property with the same key, the attribute will be overwritten source attributes. Later sources attribute will be similarly covered by the earlier property.