ES6销毁对象

Question

I am new to ES6 destructing. I have an object which contains another object. I want to store certain values from the nested object.

For example -

z = {g: 1, h: 2, i: {d1:5, d2:6, d3:7}}

When I do

let { g, i : {d1, d3}, ...less } = z

the less variable only stores h and not d2 .

Is there a way to make it so it is

less = {h, i : {d2}}

Answer 1

No there is not. What you could do is

let { g, i: { d1, d3, ...less2 }, ...less } = z
let less = { ...less, i: less2 };

This extracts the remainder and merges them back together while preserving the shape.

Answer 2

No, unfortunately this is not possible.
You can however extract the missing values from i with a second rest spread:

 let z = {g: 1, h: 2, i: {d1:5, d2:6, d3:7}}; let { g, i : {d1, d3, ...i_less}, ...rest_less } = z; let less = { i: i_less, ...rest_less }; console.log(less) 

Answer 3

This is my way, hope it could help.

 let z = { g: 1, h: 2, i: { d1:5, d2:6, d3:7 } } let {g, i: {d1, d3, ...less1}, ...less2} = z let less = { i: less1, ...less2, } console.log(less); // output: {h: 2, i:{d2:6}}