Ⓜ️method

a function that is an object's property.

JS ⟩ value ⟩ object ⟩ method

a function that is an object's property.

🔴 主題

• features of method

  • [[HomeObject]] - every method remembers its HomeObject.

  • generator function as ... (method)

• method transformers

  • decorator

  • memoization - make a method "remember" its return values.

• other topics

  • polymorphism - same method name, different callers.

⭐️ 重點

⭐️ 非常重要：

• only methods have [[HomeObject]].

• super can only be used within methods.

this

• is not fixed in a method.

• does not necessarily refer to the object containing the method.

• is passed by the function call. 👉 method binding.

📗 參考

• JS.info ⟩

  • Object methods & "this"

  • [[HomeObject]] - every method remembers its HomeObject.

📘 手冊

• Method

• this (method binding)

• Functions ⟩ Method definitions

• Expressions and operators ⟩ Object initializer ⟩ Method definitions