Now right after setTimeout runs img. The slice () method has two parameters:. It says it is coming from a setTimeout () function. 这里使用了setTimeout 方法来模拟网络请求。 Here I have used setTimeout method to simulate the network request.
SetTimeout function, which has two parameters.在这里我使用了setTimeout 方法来模拟网络请求。 Here I have used setTimeout method to simulate the network request. 它类似于setTimeout (0)代码,但有时会优先于它。 It is similar to the setTimeout (0) code, but sometimes will take precedence over it. SetTimeout 延迟给定的时间,然后为它的回调安排一个新的task。SetTimeout waits for a given delay then schedules a new task for its callback.在下面的代码中,我们使用setTimeout 等待2秒然后调用resolve。 In the code below, we use setTimeout to wait 2 seconds and then invoke resolve. SetTimeout 在WebAPI环境中开始了一个为时2s的计时器。The setTimeout () method starts a timer of 2s in the web APIs environment. 咱们还可以使用setTimeout 来延迟函数的执行,直到堆栈清空为止。 We can also use setTimeout to defer the function execution until the stack is clear. SetTimeout ()方法在webapi环境中启动一个2s的计时器。The setTimeout () method starts a timer of 2s in the web APIs environment. 背景标签限制了setTimeout 和setInterval为1000ms,以便提高性能. Background tabs have setTimeout and setInterval clamped to 1000ms to improve performance. Log(3)之前(因为调用console.log(3)是通过setTimeout 调用的,所以稍微延迟了一点)。 Log(3)(since the call to console. log(3) is invoked via setTimeout , so it is slightly delayed). 定时函数setTimeout 和setInterval都可以接受字符串作为它们的第一个参数。 SetTimeout and setInterval can also take a string as their first parameter.ClearTimeout(t)全局函数用于停止一个之前通过setTimeout ()创建的定时器。 The clearTimeout( t) global function is used to stop a timer that was previously created with setTimeout (). 这是几乎所有JavaScript开发人员在浏览器中都使用过的API(例如“setTimeout ”)。 There are APIs in the browser that have been used by almost any JavaScript developer out there(e.g.“setTimeout ”). 我们将setTimeout 再次使用fulfilled在两秒钟(2000毫秒)之后将Promise的状态更改为。 We will use setTimeout again to change the status of the promise to fulfilled after two seconds(2000 milliseconds). 有一些叫做WebAPI的东西,它们是由浏览器提供的,比如DOM,AJAX,setTimeout 等等。 We have those things called Web APIs which are provided by browsers, like the DOM, AJAX, setTimeout , and much more. Delay(),它不是JavaScript的原生setTimeout 函数的替代品,这可能是更适合某些使用情况。 Delay() is not a replacement for JavaScript's native setTimeout function, which may be more appropriate for certain use cases. 话虽这么说,如果你使用skpm,它会自动填充工具有些事情你:console,settimeout ,setinterval和fetch。 That being said, if you use skpm, it will automatically polyfill some things for you: console, setTimeout , setInterval and fetch. Eval函数以及它的亲戚(Function、setTimeout 、setInterval)都提供了访问JavaScript编译器的机会。 The eval function(and its relatives, Function, setTimeout , and setInterval) provide access to the JavaScript compiler. 你得到上述错误的原因是,当你调用setTimeout ()时,实际上是调用window.setTimeout ()。 The reason you get the above error is because, when you invoke setTimeout (), you are actually invoking window. setTimeout (). 当值为零作为setTimeout ()的第二个参数传递时,它将尝试“尽快”执行指定的函数。 When a value of zero is passed as the second argument to setTimeout (), it attempts to execute the specified function“as soon as possible”. 为了减少CPU的整体使用量,Firefox58将开始针对在背景执行的标签页的定时器(timer)控件(setTimeout /setInterval)做CPU调节。 To reduce CPU usage overall, Firefox 58 will begin throttling the timers(specifically setTimeout /setInterval) in background tabs. 归功于这500ms延迟,setTimeout ()内部的输出在调用console.log"Hi! Thanks to the 500ms delay, the output that the function passed to setTimeout () was shown after the output from the console. log("Hi!") call! 因此,在窗口对象的上下文中定义了一个传递给setTimeout ()的匿名函数,该函数没有clearBoard()方法。 As a result, the anonymous function being passed to setTimeout () is being defined in the context of the window object, which has no clearBoard() method. 该种行为被称为任务调度(jobscheduling),如果你曾经使用过setTimeout ()或setInterval()函数,那么你已经对其有所了解。 This is called job scheduling, and if you have ever used the setTimeout () or setInterval() functions, then you're already familiar with it.
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