方法时使用lodash
import { merge } from 'lodash' let a = {attr1: "1",attr2: "2",attr3: "3"} let b = {attr1: "",attr2: "",attr3: "",attr4: "4"} b = merge(b,a); //b ===> {attr1: "1",attr2: "2",attr3: "3",attr4: "4"}