setinterval | 易学教程

jQuery: Every 5 seconds, automatically click on next image in a list?

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问题 I have a given list of images, presented as thumbnails: <ul id="thumbs"> <li class="small-img"><img src="images/feature1.png" /></li> <li class="small-img"><img src="images/feature2.png" /></li> <li class="small-img"><img src="images/feature3.png" /></li> </ul> I use jQuery so that, when the user clicks on an image, it replaces the featured image in a div (which I got from another StackOverflow Ask): $('#thumbs img').click(function(){ $('div.feature-photo img').hide().attr('src',$(this).attr(

don't hide loader till the page loads completely in jquery mobile

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问题 i am trying to show the page loading widget till the page loads completely, after that it should hide... and do this process every time i punch any anchor to transmit into next page.. Support i have three pages... <div data-role="page" id="home">....</div> <div data-role="page" id="about">....</div> <div data-role="page" id="contact">....</div> Script on this i am using:- $(document).on("pagecreate", function(event) { //alert("Take It Show"); $( ".ui-loader" ).loading( "hide" ); }); Is it

Problem with IE and setInterval() not refreshing/updating

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I'm using JavaScript/Jquery to make a page auto-update with a value from a database, although it doesn't seem to update in Internet Explorer. It works fine in FireFox & Chrome. Can anyone explain what's wrong? It looks like IE is just displaying a cached version of the page. How can I prevent this happening? Thanks. function updateComm() { var url="commandSys.php"; jQuery("#theElement").load(url); } setInterval("updateComm()", 1000); Try disabling the cache with ajaxSetup $.ajaxSetup ({ // Disable caching of AJAX responses */ cache: false }); function updateComm() { var url="commandSys.php";

How can I clearInterval() for all setInterval()?

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I've got a setInterval() called in a jQuery plugin, but I want to clear it from my main page, where I don't have access to the variable that the setInterval was stored in. Is there a way to clear all timers present on a page? This can be one of logic to clear all interval... for (var i = 1; i < 99999; i++) window.clearInterval(i); Isaac Waller You can override setInterval: window.oldSetInterval = window.setInterval; window.setInterval = function(func, interval) { var interval = oldSetInterval(func, interval); // store it in a array for stopping? stop it now? the power is yours. } No, you can't

setTimeOut() or setInterval() . 4 methods to apply same thing. which is best?

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问题 I am displaying a countdown watch with respect to a given endtime. although its working perfect but i want to know which is best methods to apply. below is my countdown function. var timerId; var postData = {endDate : endDate, tz : tz}; var countdown = function() { $.ajax({ type : 'post', async : false, timeout : 1000, url : './ajax_countdown.php', data : $.param(postData), dataType : 'json', success : function (resp){ $('#currentTime').html(resp.remainingTime); } }); } what i want is that

In JavaScript, how can I access the id of setTimeout/setInterval call from inside its event function? [closed]

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问题 It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 6 years ago . How can I access the process id of setTimeout/setInterval call from inside its event function, as a Java thread might access its own thread id? var id = setTimeout(function(){ console.log(id); //Here }, 1000);

Detecting class change without setInterval

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问题 I have a div that has additional classes added to it programmatically. How can I detect the class name change without using this setInterval implementation? setInterval(function() { var elem = document.getElementsByClassName('original')[0]; if (elem.classList.contains("added")) { detected(); } }, 5500); MutationObserver? 回答1: You can use a mutation observer. It's quite widely supported nowadays. var e = document.getElementById('test') var observer = new MutationObserver(function (event) {

setInterval doesn't seem to like () in the function it invokes. Why?

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When I execute the following, incidentController gets called after 10 seconds and continues to execute with no problems every 10 seconds: // This works fine in nodejs v0.11.13 setInterval(incidentController, 10 * 1000); function incidentController () { console.log ('executed'); } However, this executes immediately and throws the following error on the second iteration: //This doesn't. The parens which wrap (123) cause the error. setInterval(incidentController(123), 10 * 1000); function incidentController (someInt) { console.log ('executed: ', someInt); } Error: timers.js:287 callback.apply

Why do people say that javascript eval() is evil but you get no objections against setTimeout and setInterval etc?

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问题 if I am not mistaken eval executes valid code in a given string eval("alert('hey')"); and setTimeout("alert('hey')",1000); does just about the same thing, only with a timer. is set timeout just as risky as eval? 回答1: I'd say you hear the same objections. setTimeout (with string and not function parameters) is pretty much the same as eval. If possible, setTimeout(function(){ alert ("hey") ; }, 1000); 回答2: Because when people say "eval", they mean "eval and any function that is more or less

recursive function vs setInterval vs setTimeout javascript

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i am using NodeJs and need call a infinite function, but i dont know what is the best for a optimal performance. recursive function function test(){ //my code test(); } setInterval setInterval(function(){ //my code },60); setTimeout function test(){ //my code setTimeout(test,60); } I want the best performance without collapse the server. My code have several arithmetic operations. appreciate any suggestions to optimize the javascript performance. Be carefull.. your first code would block JavaScript event loop. Basically in JS is something like list of functions which should be processed. When