entry类型的对象

Introduced in ES2017.

在ES2017中ES2017 。

This method returns an array containing all the object own properties, as an array of [key, value] pairs.

此方法以[key, value]对的数组形式返回一个包含所有对象自身属性的数组。

Usage:

用法：

const person = { name: 'Fred', age: 87 }Object.entries(person) // [['name', 'Fred'], ['age', 87]]

also works with arrays:

也可用于数组：

const people = ['Fred', 'Tony']Object.entries(people) // [['0', 'Fred'], ['1', 'Tony']]

You can use it to count the number of properties an object contains, combined with the length property of the array.

您可以使用它来计算对象包含的属性数量，以及数组的length属性。

翻译自:

entry类型的对象