javascript - 怎么用fetch+async模擬jQuery.when

問題描述

單個fetch+async

(async() => { try { var response = await fetch(url); var data = await response.json(); console.log(data); } catch (e) { console.log('Booo') }})();

如何像$.when一樣發起多個請求

$.when(...reqArr).done(function (...data) { }

類似

requestByFetch(urls)

問題解答

使用Promise.all

方法就是 Promise.all() , 實現如下.

let all = async (urls) => { let get = async(url) => {let res = await fetch(url);...return res; } let promises = urls.map(async (url) => await get(url)); let data = await Promise.all(promises); return data;}

soonfy