Comparison of JavaScript libraries (i) DOM function _javascript techniques

1,prototype Program Library

This is the first library to simplify the document.getElementById () to $.

For example: the original Var myele=document.getelementbyid (' id ') is equivalent to the Var myele=$ (' id ')

In addition, $ also extends some of the features

For example: Var elearray=$ (' Id1 ', ' id2 ', ' id3 ', ' id4 ') can return an array containing 4 objects.

In addition to $, this library also provides a way to find elements based on the class name Getelementsbyclassname, the method to add the class name Addclassname, the method to remove the class name Removeclassname, etc., greatly facilitates our use.

2,jquery

It's more powerful than prototype.

Like what:
document.getElementById () ==>$ (' #money ')

document.getelementsbytagname==>$ (' P ')

Returns a set of elements with the same class name: $ ('. Money ')

And can be derived more like CSS: $ ("#content table.datetable")

The parsing feature of the CSS rules provided in the jquery library is amazing, and it supports CSS1,CSS2,CSS3 and most of the selectors in XPath.

3,dojo Program Library

Get element object based on ID: Var money=dojo.byid (' Money ')

Get elements based on class name: Dojo.html.getElementByClass ()