capture handler index

Js event listening mechanism (event capture) Summary, js listening During front-end development, we often encounter the problem of adding events to page elements. There are also many js methods for adding events, which are directly added to the page

One:DOM event Flow :The event flow is the order in which events are received from the page, and the DOM2 level event specifies that the event flow consists of three stages:① Event Capture phase: An event flow model that is intended to capture an

OriginalHttp://laravelacademy.org/post/1867.htmlErrors and exceptions are an unavoidable issue in the development of handlers, and in local development we often want to capture the exceptions thrown by the program and print it out so that we can

ZCCST Original: http://zccst.iteye.com/blog/20814122014-6-25Looking at the jquery Handbook today, we found that the Event object module of jquery also has a currenttarget, which always points to this.So the conclusion is that the original

Capture and handle exceptions in IOS published apps     During iOS development, the program will throw an exception and exit. If the exception information is clear during debugging, but if it is in a released program, it is sometimes difficult to

IHTMLElement and IHTMLElement2 are two interfaces for document elements in the same series of IE browser (WebBrowser control, trident kernel. Both interfaces provide a way to programmatically access the attributes and methods of common element

The interaction between JavaScript and HTML is implemented through events.I. Flow of eventsFirst, we need to understand the concept of event flow . When we click on a button, we also click on the container element of the button, and even click the

First, the incidentAn event is a specific interaction moment that occurs in a document or in a browser window.An event is an action performed by the user or the browser itself, such as Click,load and MouseOver, which are the names of the

1. Preface Try...catch...finally I'm afraid it's a familiar statement, and it's very simple to use, logically it seems to be easy to understand. However, I personally experience the "lesson" tells me that this thing is not as simple as the

The abnormally large classification is divided into detection anomaly (checked exception) and non-detectable anomaly (unchecked exception). The detection exception is the exception that can be found in the compiler. Non-detectable anomaly also