understanding event viewer

IntroductionI believe that all the learning of JavaScript know that it is a single-threaded language, which means that JS can not be multithreaded programming, but JS has a ubiquitous asynchronous concept. In the early days, many people will interpret asynchronous as a multithreaded programming model, in fact, there are a lot of differences between them, to fully understand the asynchronous, you need to understand the operation Core JS- event loop. Be

"). AddEventListener ("click", Function (e) { alert ("The child event is triggered," + e.target.id) },true)Results:The parent event is triggered and the ParentChild event is triggered, childConclusion: Parent first, then child. The event firing order is changed to alien inward, which is the

Deep understanding of jQuery event processing and deep understanding of jquery events Browser event model DOM level 0th event model 1. Event instance This attribute provides a large amount of information about the currently being

", function (e) {//) Bind event $ (e.target) to the ancestor element of the target element. css ("Background-color", "#ddd"). Siblings (). CSS ("Background-color", "white"); })Perhaps some people will say, we directly to all Li are tied to the event can ah, no trouble, as long as ...$ ("Li"). On ("MouseOver", function () { $ (this). CSS ("Background-color", "#ddd").

A deep understanding of the event transfer mechanism of the View, and a deep understanding of the view Introduction: Currently, there are more and more cool Android controls on GitHub. On the one hand, we can make the App look beautiful, and on the other hand, we developers can learn a variety of knowledge from it. Write this blog post to record the knowledge

opera and icab don't support either. W3c Any event that occurs in the model of the event is first entered into the capture phase until the target element is reached and then into the bubbling phase. For normal web development, you can choose whether to bind the event handler in the capture or bubbling phase, which is implemented through the AddEventListener (

; at ul> - Script> - //take advantage of the event broker mechanism to get the item that is currently the first number - //Gets the parent node and adds a click event to it - varul=document.getElementById ("parent-list"); - Ul.addeventlistener ("Click",function(e) { in //Check if event source E.targe is Li - if(E.targete.target.nodenam

technique, where the following Timechunk function allows the creation of nodes to be done in batches, such as creating 1000 nodes in 1 seconds, instead of creating 8 nodes every 200 millisecondsfunction Chunk (array,process,context) { setTimeout (function () { /// Remove the next entry and process var item = array.shift (); Process.call (Context,item); // If you have an entry, set another timer if 0 { setTimeout (Arguments.callee); }}; va

Deep understanding of jQuery event removal, deep understanding of jquery Removal Sometimes, when an event is executed, you can solve it in a certain way if you want to cancel the event. For example, the bind () method can be used to remove the effect of an

JS Event Event UnderstandingHTML>Head>Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" /> title>JS Event Flow Modeltitle>Head>style>#con{width:200px;Height:200px;background:Orange; }#outer{position:relative;Top:50px; Left:50px;width:100px;Height:100px;background:#eeddff; }#inner{position:relative;Top:251px; Left:25px;width:50px;Height:5

Original address: http://www.cnblogs.com/binyong/articles/1750263.htmlThis article is very good for understanding JavaScript's event-handling mechanism, and it is reproduced here in full-text for a rainy future.What is an event?Event is the heart of the JavaScript app beating and the glue that sticks everything togethe

The example in the first section is too simplistic to understand the Java event handling mechanism (1) from scratch, simply to make the code seem useless. But no way, we continue to write this useless code, and then lead to the next phase of really useful code.One: The event-driven model first glimpseWe're going to say that the event-driven model is an upgraded v

, which is really a direct interrupt While overriding the method, although Dispatchtouchevent is the first step, we generally do not rewrite it, so we generally focus on the latter two methods on the complexity of the flow of eventsThe flow of events is related to several factors: What this view is; Two cases: view, viewgroup; affects the number of callback methods What this method is; three cases:; two kinds of situations: even