async/await - 6.使用Promise.all()让多个await操作并行

async/await - 6.使用Promise.all()让多个await操作并行

const fetch = require('node-fetch')

const sleep = (timeout = 2000) => new Promise(resolve => {
setTimeout(resolve, timeout)
})

async function getZhihuColumn(id) {
await sleep(2000)
const url = `https://zhuanlan.zhihu.com/api/columns/${id}`
const response = await fetch(url)
return await response.json()
}

const showColumnInfo = async (id) => {
console.time('showColumnInfo')
const [qianduanzhidian, FrontendMagazine] = await Promise.all([
getZhihuColumn('qianduanzhidian'),
getZhihuColumn('FrontendMagazine')
])

console.log(`name:${qianduanzhidian.name}`)
console.log(`description:${qianduanzhidian.description}`)

console.log(`name:${FrontendMagazine.name}`)
console.log(`description:${FrontendMagazine.description}`)

console.timeEnd('showColumnInfo')
}
showColumnInfo() // 2630.869ms