// 参考 MDN Background Tasks API 这篇文章// https://developer.mozilla.org/zh-CN/docs/Web/API/Background_Tasks_API#examplelet taskHandle = null;let taskList = [() => {console.log('task1')},() => {console.log('task2')},() => {console.log('task3')}]function runTaskQueue(dea...
functiongetMoneyBack(money){returnnewPromise((resolve,reject)=>{if(typeofmoney!=='number'){reject(newError('money is not a number'))}else{resolve(money)}})}getMoneyBack(1200).then((money)=>{console.log(money)}) Promise 对象 它们是JS中构成Promise的核心部分。 所以,我们为什么需要JS中的Pro...
http.get('https://api.github.com/users', function(users) { /* Display all users */ console.log(users); http.get('https://api.github.com/repos/javascript/contributors?q=contributions&order=desc', function(contributors) { /* Display all top contributors */ console.log(contributors); http....
I wrote a AWS lambda function which buys €X worth of some currency on an exchange. For this I first have to find out the current price (getAskPrice), then calculate the amount to buy and post the order (buyLimitOrder). I've implemented both operations as promises,buyLimitOrdergets the...
在空闲的时候加载些东西,可以看看 qiankun 的例子,用来预加载 js 和 css function prefetch(entry: Entry, opts?: ImportEntryOpts): void { if (! || isSlowNetwork) { // Don't prefetch if in a slow network or offline return; } requestIdleCallback(async () => { ...
MDN也提供了 requestIdleCallback 的 polyfill 写法: window.requestIdleCallback = window.requestIdleCallback || function(handler) {let startTime = Date.now();return setTimeout(function() {handler({didTimeout: false,timeRemaining: function() {return Math.max(0, 50.0 - (Date.now() - startTim...
在空闲的时候加载些东西,可以看看 qiankun 的例子,用来预加载 js 和 css functionprefetch(entry:Entry,opts?:ImportEntryOpts):void{ if(!navigator.onLine||isSlowNetwork) { // Don't prefetch if in a slow network or offline return; } requestIdleCallback(async()=>{ ...
// 例子,来自MDNvarstart =null;varelement =document.getElementById('SomeElementYouWantToAnimate'); element.style.position='absolute';functionstep(timestamp) {if(!start) start = timestamp;varprogress = timestamp - start; element.style.left=Math.min(progress /10,200) +'px';if(progress <2000...
This property in Node.js is crucial, as it gives control back to the event loop as soon as an asynchronous request is sent, thus allowing a new event from the queue to be processed.Figure 3.1 shows how this works:Figure 3.1: Control flow of an asynchronous function's invocation...
using var input = new Document(pdfStream); doc.Convert(GetHocr); where GetHocr is a function definition taking an image to extract the text.asad.ali 2020 年10 月 28 日 21:36 2 @Azure Would you please share a sample PDF document with us with w...