promise await tutorial typescript code example
Example: async await function in typescript
function delay(milliseconds: number, count: number): Promise<number> {
return new Promise<number>(resolve => {
setTimeout(() => {
resolve(count);
}, milliseconds);
});
}
// async function always returns a Promise
async function dramaticWelcome(): Promise<void> {
console.log("Hello");
for (let i = 0; i < 5; i++) {
// await is converting Promise<number> into number
const count: number = await delay(500, i);
console.log(count);
}
console.log("World!");
}
dramaticWelcome();