带有“ const”的怪异JavaScript代码约定

问题描述

javascript中的这段代码约定是什么？

What is this code convention in javascript?

const {导航} = //什么

从什么意义上讲。我在RNs React导航中看到了

As in, what sense does it make. I saw it in RNs React navigation

推荐答案

它被称为解构。当您有一个对象并且只想使用该对象的属性时，可以使用该约定仅获取它。

It's named destructuring. When you have an object and you want to take only a property of that object, you can get only it by using that convention.

let fullName = { 
  first: 'John',
  last: 'Smith'
}

const { first } = fullName;

您可以在此处查看更多信息

You can take a look here for more info's

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