https://developer.mozilla.org/en-US/docs/Web/JavaScript/A_re-introduction_to_JavaScript

​## 数据类型

• Number
• BigInt
• String
• Boolean
• Symbol

• Object

  • Function
  • Array
  • Date
  • RegExp
• null
• undefined

还有 Error 对象，用于运行时抛出错误。

​## 闭包

A closure is the combination of a function and the scope object in which it was created. Closures let you save state — as such, they can often be used in place of objects.

1. 以《JavaScript 高级程序设计》作为母本学习 JS
2. http://jstherightway.org/
3. The Modern JavaScript Tutorial: https://javascript.info/

​## 参考资料

​### 官方标准

• [ECMAScript® Latest Language Specification](https://262.ecma-international.org/) or https://tc39.es/ecma262/

​### 系统教程

• [React - web.dev](https://web.dev/react/)

​### 别人的规划

• https://github.com/upupming/frontend-learning-map
• https://roadmap.sh/frontend