BadMutable

Day.js is designed to be immutable, however, in order to make it fully compatible with moment.js in some legacy projects we introduced a plugin 🚨 BadMutable 🚨 使 Day.js 可变。

这不好，不推荐用于大多数项目。

启用此插件后，所有设置器都将更新实例本身。

var badMutable = require('dayjs/plugin/badMutable')
dayjs.extend(badMutable)
// with 🚨 BadMutable 🚨 plugin
const today = dayjs()
today.add(1, 'day')
console.log(today) // update itself, value will be tomorrow