🔰type

🚧 under construction

JS ⟩ value ⟩ type

🚧

⭐️ 重點

there is no type associated with variable declaration❗

The operands of comparison operator may be of any type.

🔴 主題

• main topics

  • type name

  • custom type name

• type terms

  • falsy

  • statically typed

  • dynamically typed - JS is a dynamically typed language.

• value types

  • primitive

    • String / Number / Boolean

  • object

    • class / Array / Set / Map

• helper functions

  • type functions

👥 相關

• typeof determines the type of a value. (👉 type name)

• typeName()

• TypeScript is a JavaScript dialect that checks types.

📗 參考

• Eloquent JavaScript > Types

📘 手冊

• typeof

• instanceof

🚧

• type conversion table

• what is "type" in JS? 🚧

• how to determine a value's "type"? 🚧