setinterval

Why does Twitter redefine window.setTimeout and window.setInterval?

由 ↘锁芯ラ 提交于 2019-12-30 04:49:06
问题 I was studying the Twitter source code, and I came across the following snippet: window.setTimeout=window.setTimeout;window.setInterval=window.setInterval; Why does Twitter redefine these functions? Edit: To see the code, go to any twitter user page, open the source of the page, and you will see that snippet in the second block of javascript. 回答1: This is a technique to replace setTimeout and setInterval functions globally in a cross-browser fashion. window.setTimeout , when used as an lvalue

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

由 荒凉一梦 提交于 2019-12-29 08:15:28
问题 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

Using setInterval() to do simplistic continuous polling

由 心已入冬 提交于 2019-12-29 03:33:07
问题 For a simple webapp that needs to refresh parts of data presented to the user in set intervals, are there any downsides to just using setInterval() to get a JSON from an endpoint instead of using a proper polling framework? For the sake of the example, lets say I'm refreshing status of a processing job every 5 seconds. 回答1: From my comment: I would use setTimeout [docs] and always call it when the previous response was received. This way you avoid possible congestion or function stacking or

Equivalent of setInterval in python

由 ⅰ亾dé卋堺 提交于 2019-12-29 03:14:26
问题 I have recently posted a question about how to postpone execution of a function in Python (kind of equivalent to Javascript setTimeout ) and it turns out to be a simple task using threading.Timer (well, simple as long as the function does not share state with other code, but that would create problems in any event-driven environment). Now I am trying to do better and emulate setInterval . For those who are not familiar with Javascript, setInterval allows to repeat a call to a function every x

Fade HTML element with raw javascript

由 落花浮王杯 提交于 2019-12-28 13:57:25
问题 It's my second question of the day related to the same problem, so I apologize for that. I was able to put together a function to "fade out" an element, and it works just fine, my problem is that when I try to reverse it, so the element "fades in" it does not work. I've tried to change the obvious, but I can't understand what I'm doing wrong. My code so far is as follows: Given I have a "div" like so: <div id="test" style="width:200px; height:200px; display:block; opacity:1; background-color

Fade HTML element with raw javascript

由 若如初见. 提交于 2019-12-28 13:57:10
问题 It's my second question of the day related to the same problem, so I apologize for that. I was able to put together a function to "fade out" an element, and it works just fine, my problem is that when I try to reverse it, so the element "fades in" it does not work. I've tried to change the obvious, but I can't understand what I'm doing wrong. My code so far is as follows: Given I have a "div" like so: <div id="test" style="width:200px; height:200px; display:block; opacity:1; background-color

前端基础之BOM和DOM

由 断了今生、忘了曾经 提交于 2019-12-28 04:47:51
前端基础之BOM和DOM 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()。 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

前端之Bom和Dom

由 点点圈 提交于 2019-12-28 04:41:47
前端基础之Bom和Dom 简介： 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对象是其他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.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ifram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window对象的成员 全局变量是window对象的属性，全局函数是window对象的方法 接下来的HTML Dom的document也是window对象的属性之一 一些常用的window方法： window.innerHeight:浏览器窗口的内部高度 window.innerWidth:浏览器窗口的内部宽度

前端js之BOM和DOM

由 家住魔仙堡 提交于 2019-12-28 04:41:37
BOM与DOM 　　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()。 windows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 window 对象的成员。 全局变量是 window 对象的属性。全局函数是 window 对象的方法。 接下来要讲的HTML DOM 的 document 也是 window 对象的属性之一。 一些常用的Window方法： window.innerHeight -

setInterval not working properly on Chrome

由 天大地大妈咪最大 提交于 2019-12-28 02:03:49
问题 I have a custom made slideshow object to perform the usual stuff the name indicates on a website. It all works well except when I switch tabs in Chrome and come back to the website tab. When that happens, the slideshow goes nuts and starts fading the images disregarding the setInterval interval given. Can't find anyhing related to this, so I'd like to at least know if it's a problem with the code or a software issue. Here's the code (being used with jQuery) : $(function() { // slideshow var
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