02常量-es6
# 常量
//常量是固定的量，一般用于存地址等信息
const a = 1
const baseUrl = "www.baidu.com"
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[!cogs]
//es5
var BASE_URL = "www.baidu.com"
BASE_URL = "www.sina.com"
console.log(BASE_URL); //www.sina.com
//es6
const BASE_URL = "www.baidu.com"
BASE_URL = "www.sina.com"
console.log(BASE_URL); //报错
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上次更新: 2022/04/24, 13:33:34