ajax settimeout

Basic usage of settimeout and setinterval we don't talk about it, it's nothing but 1. Specify the delay after calling the function, 2. Call a function with a specified periodLet's imagine an unexpected situation, such as the following setinterval setInterval(function(){func(i++);},100) 　　We call the Func function every 100 milliseconds, and if the Func execution time is less than 100 milliseconds, it will be able to execute

It may even mistakenly understand the two functions that implement scheduled calls as something similar to thread, and think that they will execute the called functions concurrently in a time slice, which seems very good and powerful, however, this is not the case. The actual situation is that javascript runs in the browser's javascript engine in a single thread, the functions of setTimeout and setInterval are to insert the code you want to execute in

JS manual»settimeout (): Used to call a function or evaluate an expression after a specified number of milliseconds;English explanation»timeout (): timeout, temporary rest, breaks;JS manual»setinterval (): Invokes a function or evaluation expression in the specified period (in milliseconds). The function is called continuously until the Clearinterval () is called or the window is closed;English explanation»interval (): interval; spacing; intermission;

One, settimeout this point to the problem This in settimeout ("This.count ()", 1000) refers to the Window object. The settimeout of JS is defined as Copy Code code as follows: Window.settimeout=function (Vcode, Imilliseconds [, Slanguage]) { //..... Code Return timer//Returns a marker } So when you pass this to

, and these pits may not be from the current new thing, but they have some basic knowledge is not solid. function Asyncfunction () {return new Promise (function (resolve, reject) { settimeout (function () { Resolve (' Async Hello World ') ;} Asyncfunction (). Then (function (value) { console.log (value); => ' Async Hello World ' }. catch (function (error) { consol

>show an alert box after 2 secondsTips for using settimeout (1) The call function pass parameter in IE to the settimeoutThe above analysis shows that IE is not supported in the settimeout to the called function parameters, for the sake of the harmony of the browser world, we can wrap the function call parameters into the new anonymous function. Example:function f (a) {alert (a);}

The use of timer settimeout in JavaScript is generally as follows: After calling Beginrotate, you enter a process that executes the rotateloop in a timed, following code. Copy Code code as follows: var angle = 0; function Rotateloop () { if (angle angle++; Use angle //...... SetTimeout ("Rotateloop ()", 100); } } function Beginrotate () { Do something //......

Currently this settimeout can be well compatible with ie6,7,8,9 as well as Google browser Chrome, Firefox firefox, Apple browser Safari,opera. SetTimeout is a very good function, Site page front-end engineers often use it for a few seconds after the execution of the action. settimeout This JS built-in function is also very simple to use, the following is the

Original: JavaScript Tour-terminal: the confused settimeout　　Sometimes the end is not very good, but at least it is a kind of ending, this series of the last article settimeout, this is a confusing function, but also I have been in the slot JSReason, we do not see the source code JS, Setimeout also, from the beginning to the end is the use of black boxes.A: settimeout