javascript - 在 javascript 中解构嵌套对象 |解构二级父子对象

Question

我需要从该对象中解构并获取 title、child、childTitle 的值

const obj1 = {
   title : 'foo',
   child : {
       title2 : 'bar'
   }
}

let {title, child} = obj1;
console.log(title)   // 'foo'
console.log(child)   // { title : 'bar' } 

// but couldn't get child object this way

let { title , child : { title2 } } = obj1;
console.log(title)   // 'foo'
console.log(child)   // undefined
console.log(title2)  // 'bar'

我怎样才能得到子对象？

Answer 1

child: { title2 } 只是解构子属性。如果您想获取子属性本身，只需在语句中指定它:let { title, child, child: { title2 } } = obj1;

const obj1 = {
  title: 'foo',
  child: {
    title2: 'bar'
  }
}

let { title, child, child: { title2 } } = obj1;

console.log(title);
console.log(child); 
console.log(title2);