How to get the element of specified class attribute name in javascript

This article focuses on "how to get the elements of a specified class attribute name in javascript". Interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn "how to get the elements that specify the class attribute name in javascript".

GetElementsByClassName

In addition to getting the element through the specified tag, DOM also provides a getElementsByClassName method to get the element with the specified class name. However, because this method is relatively new, older browsers do not support it, such as IE6. However, we can use hack to make up for the shortcomings of old browsers. The method is called as follows:

Document.getElementsByClassName ('demo') / / the class name specified by demo for the element

Like getElementsByTagname, this method can be called not only by document objects, but also by ordinary elements.

For older browsers, such as IE6, 7, we can implement it in the following hack way:

Function getElementsByClassName (node,classname) {if (node.getElementsByClassName) {return node.getElementsByClassName (classname);} else {var results = []; var elems = node.getElementsByTagName ("*"); for (var I = 0; I < elems.length) If (javascript [I] .classname. IndexOf (classname)! =-1) {results [results.length] = elems [I];}} return results;}} so far, I believe you have a deeper understanding of "how to get the element of a specified class attribute name in javascript". You might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!