Js 对象的拷贝方法

浅拷贝

  let obj = {a:1,b:2,c:{d:1}}
  let cloneObj = {...obj}

or

 let obj = {a:1,b:2,c:{d:1}}
 let cloneObj = Object.assign({},obj)

深拷贝

  let obj = {a:1,b:2,c:{d:1}}
  let cloneObj = JSON.parse(JSON.stringify(obj))

or

function cloneObject(obj) {
    var clone;
    if (obj instanceof Object) {
        if (!(obj instanceof Function)) {
            clone = obj instanceof Array ? new Array() : new Object();
            for (var k in obj) {
                clone[k] = cloneObj(obj[k]);
            }
        } else {
            clone = obj
        }
    } else {
        clone = obj
    }
    return clone;
}

 let obj = {a:1,b:2,c:{d:1}}
 let cloneObj = cloneObject(obj)