javascript getelementsbyclassname

The development of DOM is related to the trend of web standardization. Only based on the correct semantic logic, DOM can play its function correctly. Today, the right semantic structure, performance and content separation requirements, have become the basic requirements of web design. Therefore, in the front-end development of Web pages, the existence of DOM, is undoubtedly for the performance layer, behavior layer and even the content level of the connection provides an excellent API, become a

Article Introduction: finally undefined thank you for reading this article! Sincerely hope it will help you become a JavaScript enthusiast. If you are already familiar with JavaScript, you can recommend any other relevant resources in the comments. It's a terrible thing to learn something new. For me, the biggest problem with mastering a new skill is that I don't know what I understand. In view o

As we all know, in c and java, the main function provides the main method as the entry function or method of a program. Starting from the header of the JS source file in js, we can still create a main function as the starting point of the program, so that it can be integrated with other languages, and you may have a deeper understanding of JS. If you are interested, you can learn it with xiaobian. In C and Java, there is a program entry function or method, that is, the main function or main meth

Document directory Syntax for creating a function: Example A function is an event-driven or reusable code block that is executed when it is called.Instance Function How to call a function. Functions with Parameters How to pass a variable to a function and how to use the variable in the function. Function 2 with Parameters How to pass multiple variables to the function, and how to use these variables in the function. Return Value Function

To find out the tree menu from a lot of HTML code (maybe there are multiple), let's first implement a method to find the DOM node through className: getElementsByClassName. This is a simple but practical extension of the browser's own DOM method. GetElementsByClassName () To find out the tree menu from a lot of HTML code (maybe there are multiple), let's first implement a method to find the DOM node through

ArticleDirectory Calendars and timelines Javascript debugging and validation tools Forms, buttons navigation Layout tools Useful jquery plugins Educational JavaScript resources and tutorials Related posts [Original address]: http://www.smashingmagazine.com/2010/03/12/45-fresh-useful-javascript-and-jquery-techniques-and-tools/ Y

performed on the node.Programming InterfaceThe HTML DOM can be accessed through JavaScript (and other programming languages). All HTML elements are defined as objects, while programming interfaces are object methods and object properties. Methods are actions that you can perform (such as adding or modifying elements). A property is a value that you can get or set (such as the name or content of a node).Some common HTML DOM properties: InnerH

Javascript Tutorial: querySelector () method, Module dom {[Supplemental, NoInterfaceObject]Interface NodeSelector {Element querySelector (in DOMString selectors );NodeList querySelectorAll (in DOMString selectors );};Document implements NodeSelector;DocumentFragment implements NodeSelector;Element implements NodeSelector;}; From the interface definition, we can see that Document, DocumentFragment, and Element all implement the NodeSelector interface.

the general rule is: Do your best to be in your own scope (JavaScript Island), and do not often get out of the box. (It is said that in Guangzhou, do not make friends if the monthly salary is less than 5 K, you know !). Comparison of the two methods for updating pages: innerhtml and Dom (for example, document. createlment ). The answer to high-performance JavaScript programming is: the performance is not m

restore the parent element's original ID in the finnally clause. You may find that there is a magical place in the JavaScript language hidden here, even though we have already return in the try statement, but the finnally clause is still executed (before the result value is actually return to the calling function).The selector API will definitely count as the most promising new API in the standard. Once the mainstream browser supports CSS3 (or at lea

In this topic, we will discuss JavaScript testing to check whether the component status and working method meet expectations. We will also introduce a testing method that facilitates the compilation of test cases. The tests mentioned here are of course the use of automated testing methods, which is an important part of software quality assurance (QA. In this topic, we will discuss JavaScript testing to chec

Recently, I have passed some tests to comprehensively parse the JavaScript code execution sequence of web pages in various browsers and record them here. We know that javaScript is an interpreted language, and its execution is top-down, but the understanding of each browser is slightly different, the upstream and downstream of the code, that is, the Program Stream, is crucial to the correctness of the progr

Recently, I have passed some tests to comprehensively parse the JavaScript code execution sequence of web pages in various browsers and record them here. We know that javaScript is an interpreted language, and its execution is top-down, but the understanding of each browser is slightly different, the upstream and downstream of the code, that is, the Program Stream, is crucial to the correctness of the progr

You also need to know about netive apps that can be used to develop Metro interfaces using JavaScript on Windows 8. In fact, OSX also provides similar functions,OS X v10.4 tiger providesDashboard ApplicationProgramTo add widgets. You can use the F4 hotkey to conveniently enable the dashboard. I have to say,Dashboard is also the birthplace of the well-known canvas Technology. Small programs running on dashboard, fully usedHTML, Dom, CSS,JavascriptTec

Javascript (1) Summary of javascript Array usage (1), javascript Array /* 1. The js array, like the arrays in other languages, is an ordered list of data, but the difference is that each item of the js array can save any type of data. In addition, the js array size can be dynamically adjusted. 2. Create an Array: * // (1) Use the Array constructor to create an Ar

Summary of javascript creation objects (javascript advanced programming) and javascript programming1. Factory Model This mode abstracts the process of creating a specific object and uses functions to encapsulate specific interfaces to create classes. function createStudent(name) { var o = new Object(); o.name = name; o.sayName = function(

Complete Javascript development kit Prototype Prototype is a JavaScript framework that aims to publish development of dynamic web applications. Homepage: http://prototype.conio.net Documentation:Http://blogs.ebusiness-apps.com/jordan/pages/Prototype%20Library%20Info.htmHttp://www.sergiopereira.com/articles/prototype.js.htmlHttp://wiki.script.aculo.us/scriptaculous/show/Prototype Rico Rico provides a very

(), getElementsByTagName (), Getelementsbyclassname (). Document write: Write (), Writeln (), open (), close () Element type: GetAttribute (), to get attributes for class, use "class" instead of classname to get the class attribute when using Element.classname. SetAttribute (), sets the attribute, and replaces it if the attribute exists. Otherwise, create. RemoveAttribute (), remove element attributes completely. CreateElement () to create a ne

We often see some data types in javascript, such as "undefined", "boolean", and "string, this article will help you learn the basic JavaScript data types, value types, and reference types. For more information, see this article, four basic data types in JavaScript: Numeric (integer and real), string (character or value enclosed by a "" sign or), Boolean (expresse