🔰grammar

🚧 施工中

JS ⟩ grammar

🈯 synonyms：lexical grammar

the set of elementary rules 🚧 that specifies how you write programs.

🔴 主題

• token

  • keyword

  • punctuator

  • identifier

  • literal

• comment

• declaration

• statement

⭐️ 重點

JS code：

• case-sensitive

• ignores whitespaces (some exceptions for line breaks).

📗 參考

• (2020) JavaScript The Definitive Guide (Ch. 2).

📘 手冊

• Lexical grammar

• ECMA ⟩ Lexical Grammar ⟩

  • 5.1.2 The Lexical and RegExp Grammars

  • 12.6.2 Keywords and Reserved Words ⭐️

  • 12.7 Punctuators

🚧

what are elementary rules?