TypeScript typeof演算子の使い方のサンプル
環境
Windows 11 Pro 64bit
TypeScript 4.4.4
構文
type Person = {
カラム名1: string;
カラム名2: number;
};
typeof person
typeof演算子を使って変数の型を取得できます。
使用例
type Person = {
name: string;
age: number;
};
const person: Person = {
name: 'oosaki',
age: 33,
};
console.log(typeof '');
console.log(typeof person);
type Person = {
name: string;
age: number;
};
const person: Person = {
name: 'oosaki',
age: 33,
};
console.log(typeof '');
console.log(typeof person);
type Person = {
name: string;
age: number;
};
const person: Person = {
name: 'oosaki',
age: 33,
};
console.log(typeof '');
console.log(typeof person);
実行結果
string
object