javascript - JS中如何用字符串调用数组名

Question

const EleList = [1,2,3]
name = 'Ele'

const render = function(type){
    window[type + 'List'].forEach(function(value){
    console.log("LOL")


render('Ele')

我应该用什么替换 window[name + 'List'] 来使用字符串调用数组。

Answer 1

const 或 let 变量不会添加到全局 window 对象中。

用 var 替换 const 应该可以解决您的问题。

var EleList = [1,2,3]

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/const

Global constants do not become properties of the window object, unlike var variables.

https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/let

Just like const the let does not create properties of the window object when declared globally (in the top-most scope).