2621. Sleep · Hsing-Yu

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題目敘述

Given a positive integer millis, write an asyncronous function that sleeps for millis milliseconds. It can resolve any value.

Example 1

Input: millis = 100 Output: 100 Explanation: It should return a promise that resolves after 100ms. let t = Date.now(); sleep(100).then(() => { console.log(Date.now() - t); // 100 });

Example 2

Input: millis = 200 Output: 200 Explanation: It should return a promise that resolves after 200ms.

解題思路

Solution

/**
 * @param {number} millis
 */
async function sleep(millis) {
    return new Promise(function(val){
        return setTimeout(val, millis);
    });
}

/** 
 * let t = Date.now()
 * sleep(100).then(() => console.log(Date.now() - t)) // 100
 */

async function sleep(millis: number): Promise<void> {
    return new Promise(function(val: any): any{
        return setTimeout(val, millis);
    });
}


/** 
 * let t = Date.now()
 * sleep(100).then(() => console.log(Date.now() - t)) // 100
 */