🔹constructor

JS ⟩ value ⟩ function ⟩ constructor

a function that supports the [[Construct]] internal method, that is, a constructable function.

⭐️ 重點

function vs. constructor

• function：

  • object that supports the [[Call]] internal method.

• constructor：

  • object that supports the [[Construct]] internal method.

  • every constructor must support [[Call]] (that is, every constructor is a function)

👉 ES2023 ⟩ Additional Essential Internal Methods of Function Objects

👉 compare：

• the constructor method of a class.

• the constructor property present on all objects.

👥 相關

• a constructor is a function.

• callable vs. constructable.

📘 手冊

• ES2023 ⟩ Additional Essential Internal Methods of Function Objects

• Object.prototype.constructor

❓

what a constructor actually is in plain JS ❓

(what does the part "supports the [[Construct]] internal method" really mean?)