functiongetMoneyBack(money,callback){if(typeofmoney!=='number'){callback(null,newError('money is not a number'))}else{callback(money)}}constmoney=getMoneyBack(1200)console.log(money) Promises: 代码语言:javascript 代码运行次数:0 运行 AI代码解释 functiongetMoneyBack(money){returnnewPromise((r...
http.get('https://api.github.com/repos/javascript/contributors?q=contributions&order=desc', function(contributors) { /* Display all top contributors */ console.log(contributors); http.get('https://api.github.com/users/Jhon', function(userData) { /* Display user with username 'Jhon' */ con...
// 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...
Returns An unsigned long integer that can be used to cancel the callback using theWindow.cancelIdleCallback()method. Parameters callback A reference to a function that should be called in the near future. The callback function takes a deadline argument with the following properties: ...
functionwork(deadline:Deadline) {// deadline 上面有一个 timeRemaining() 方法,能够获取当前浏览器的剩余空闲时间, 单位ms;有一个属性didTimeout,表示是否超时 console.log(`当前帧剩余时间: ${deadline.timeRemaining()}`); if(deadline.timeRemaining()>1||deadline.didTimeout) { ...
// 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...
In JavaScript, a callback is a function that is passed as an argument to another function and is invoked with the result when the operation completes. In functional programming, this way of propagating the result is called continuation-passing style (CPS)....
In my mind, using promises, I had to create this promise inside theasyncSomethingfunction, and then instead ofasyncSomething(b)I would doasyncSomething().then(b). And while this might read cleaner (and it is for that reason) I never really saw the benefit for it. ...
A reference to a function that should be called in the near future. The callback function takes a deadline argument with the following properties: timeRemaining: A reference to a method that returns aDOMHighResTimeStamp. didTimeout: A boolean that returns false if the callback was invoked ...
// 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...