Ts异步函数类型
代码示例
ts异步函数类型
// async anonymous function always returns a Promise
const dramaticWelcome: Promise<void> = async () => {
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!");
}
typescript中的异步await函数
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!");
}
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