javascript - 如何将一个对象的现有属性以 Angular 复制到另一个对象？

Question

考虑以下代码:

const x={name:"a"};
const y={name:"b", fname:"c"};
const z = Object.assign(x,y); //output: z={name:"b", fname:"c"}
//expected: {name:"b"}

如何达到预期效果？

Answer 1

您可以使用 for...in循环

const x={name:"a"};
const y={name:"b", fname:"c"};
const z = {};
for (let key in x) z[key] = y.hasOwnProperty(key) ? y[key] : x[key];
console.log(z);