优化处理：图片或文件批量下载

import axios from 'axios'export const handQueue = (reqs // 请求总数
) => {reqs = reqs || []const requestQueue = (concurrency) => {concurrency = concurrency || 6 // 最大并发数const queue = [] // 请求池let current = 0const dequeue = () => {while (current < concurrency && queue.length) {current++;const requestPromiseFactory = queue.shift() // 出列requestPromiseFactory().then(() => { // 成功的请求逻辑}).catch(error => { // 失败console.log(error)}).finally(() => {current--dequeue()});}}return (requestPromiseFactory) => {queue.push(requestPromiseFactory) // 入队dequeue()}}const enqueue = requestQueue(6)for (let i = 0; i < reqs.length; i++) {enqueue(() => axios.get('/api/test' + i))}
}