プロパティアクセサー

const person1 = {}; person1["firstname"] = "Mario"; person1["lastname"] = "Rossi"; console.log(person1.firstname); // Expected output: "Mario" const person2 = { firstname: "John", lastname: "Doe", }; console.log(person2["lastname"]); // Expected output: "Doe"

[kita-tuba]

メンバー演算子