setinterval

Can clearInterval() be called inside setInterval()?

空扰寡人 提交于 2019-11-29 21:59:05
bigloop=setInterval(function () { var checked = $('#status_table tr [id^="monitor_"]:checked'); if (checked.index()===-1 ||checked.length===0 || ){ bigloop=clearInterval(bigloop); $('#monitor').button('enable'); }else{ (function loop(i) { //monitor element at index i monitoring($(checked[i]).parents('tr')); //delay of 3 seconds setTimeout(function () { //when incremented i is less than the number of rows, call loop for next index if (++i < checked.length) loop(i); }, 3000); }(0)); //start with 0 } }, index*3000); //loop period I have the code above and sometimes it is working, sometimes it is

In AngularJS, how to detect when user leaves template/page?

谁说我不能喝 提交于 2019-11-29 19:51:31
I am using the Javascript command: setInterval. I like to stop it when the user leaves the page. This code seems to work well: http://jsfiddle.net/PQz5k/ It detects when a user leaves a page. It executes Javascript code when a user clicks on a link to go to a different HTML page or URL, or if user reloads page. However, it does not work when I go from one AngularJS template to another. As an example, if I am at template1.html, I want the Javascript code to do something in Controller1.js when the user leaves template1.html to go to template2.html. What is the equivalent of this code below in

前端基础之BOM和DOM

血红的双手。 提交于 2019-11-29 19:44:37
前端基础之BOM和DOM 1 | 0 前戏 到目前为止,我们已经学过了JavaScript的一些简单的语法。但是这些简单的语法,并没有和浏览器有任何交互。 也就是我们还不能制作一些我们经常看到的网页的一些交互,我们需要继续学习BOM和DOM相关知识。 JavaScript分为 ECMAScript,DOM,BOM。 BOM(Browser Object Model)是指浏览器对象模型,它使 JavaScript 有能力与浏览器进行“对话”。 DOM (Document Object Model)是指文档对象模型,通过它,可以访问HTML文档的所有元素。 Window对象是客户端JavaScript最高层对象之一,由于window对象是其它大部分对象的共同祖先,在调用window对象的方法和属性时,可以省略window对象的引用。例如:window.document.write()可以简写成:document.write()。 1 | 1 window对象 所有浏览器都支持 window 对象。它表示浏览器窗口。 *如果文档包含框架(frame 或 iframe 标签),浏览器会为 HTML 文档创建一个 window 对象,并为每个框架创建一个额外的 window 对象。 *没有应用于 window 对象的公开标准,不过所有浏览器都支持该对象。 所有 JavaScript 全局对象

setInterval function without arrow function

点点圈 提交于 2019-11-29 18:54:01
问题 I am learning about react components following the documentation https://facebook.github.io/react/docs/state-and-lifecycle.html Why do we need to use arrow function here: this.timerID = setInterval(() => this.tick(), 1000); Why can't I just say (obviously it doesn't work) this.timerID = setInterval(this.tick(), 1000); 回答1: The first argument for setInterval is of type function . If you write this: this.timerID = setInterval(this.tick(), 1000); …then you don't pass a function, instead you

前端之BOM和DOM

China☆狼群 提交于 2019-11-29 13:33:59
1 | 0 前戏 到目前为止,我们已经学过了JavaScript的一些简单的语法。但是这些简单的语法,并没有和浏览器有任何交互。 也就是我们还不能制作一些我们经常看到的网页的一些交互,我们需要继续学习BOM和DOM相关知识。 JavaScript分为 ECMAScript,DOM,BOM。 BOM(Browser Object Model)是指浏览器对象模型,它使 JavaScript 有能力与浏览器进行“对话”。 DOM (Document Object Model)是指文档对象模型,通过它,可以访问HTML文档的所有元素。 Window对象是客户端JavaScript最高层对象之一,由于window对象是其它大部分对象的共同祖先,在调用window对象的方法和属性时,可以省略window对象的引用。例如:window.document.write()可以简写成:document.write()。 1 | 1 window对象 所有浏览器都支持 window 对象。它表示浏览器窗口。 *如果文档包含框架(frame 或 iframe 标签),浏览器会为 HTML 文档创建一个 window 对象,并为每个框架创建一个额外的 window 对象。 *没有应用于 window 对象的公开标准,不过所有浏览器都支持该对象。 所有 JavaScript 全局对象、函数以及变量均自动成为

Call a Javascript function every x seconds and stop after y seconds?

孤人 提交于 2019-11-29 13:03:19
I want to call a Javascript function after clicking a button, make it loop every 100 milliseconds for 1,5 seconds and then pause it. The idea is that I want to make this accordion slider able to show scrollable content using this custom jQuery scrollbar(I have no idea of any other better custom cross-browser scrollbar). The scrollbar must be reconstructed with this function every time the users clicks one of the items, using this: $(".ac-big").customScrollbar("resize") In order to make the transition run smooth I've used setInterval as in the example below: <script type="text/javascript"> $

Javascript setInterval clearInterval Simple Example Not Working Explained?

烂漫一生 提交于 2019-11-29 12:13:13
I have a very simple JS setInterval and clearInterval example that doesn't work. There has got to be an underlying reason why it does not work and I would like to know why that is: var automessage; function turnON() //executed by onclick event A { var automessage = setInterval(function(){ something() }, 2000); } function turnOff() //executed by onclick event B { clearInterval(automessage); } function something() { //pulls instant messages } In this example, an end-user clicks a button to start a timed interval process, clicks another button to stop the timed interval process, and then clicks

iOS 6 safari, setInterval doesn't get fired

余生颓废 提交于 2019-11-29 10:28:26
问题 It seems if I'm scrolling the window , the window.setInterval doesn't get attached / fired while the scrolling is happening or after. Has anyone else seen the same issue? I mean... What could be causeing this? What can I do to fix this? 回答1: iOS halts almost everything in response to user touch to guarantee it feels responsive. The setInterval issue is known, and there doesn't appear to be a workaround. setInterval pauses in iphone/ipad (mobile Safari) during scrolling EDIT During the "freeze

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

我的未来我决定 提交于 2019-11-29 10:21:22
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); console.log(id); That code will work as-is, since setTimeout will always return before invoking the provided callback, even if you pass a timeout value which is very small, zero, or negative. > var id = setTimeout(function(){ console.log(id); }, 1); undefined 162 > var id = setTimeout(function(){ console.log(id); }, 0); undefined 163 > var id = setTimeout(function(){ console.log(id); },

移动端唤起键盘后焦点错位的情况

北城余情 提交于 2019-11-29 10:18:58
// 解决唤起键盘后焦点定位错位的情况 使用方式@blur='blurhandler' blurhandler(){ let ua = window.navigator.userAgent; if(!!ua.match(/\(i[^;]+;( U;)? CPU.+Mac OS X/)){ // ios 端 var currentPosition,timer; var speed=1; timer=setInterval(function(){ currentPosition=document.documentElement.scrollTop || document.body.scrollTop; currentPosition-=speed; window.scrollTo(0,currentPosition);//页面向上滚动 // currentPosition+=speed; // window.scrollTo(0,currentPosition);//页面向下滚动 clearInterval(timer); },100); } }, 来源: https://www.cnblogs.com/TheHeartWants/p/11514639.html