javascript getelementsbyclassname

1.getElementsByClassName ()functionGetelementsbyclassname (node,classname) {if(node.getelementsbyclassname) {//using existing methods returnnode.getelementsbyclassname (classname); }Else{ varresults=NewArray (); varElems=node.getelementsbytagname ("*"); for(vari=0;i){ if(Elems[i].classname.indexof (ClassName)!=-1) {Results[results.length]=Elems[i]; } } returnresults; }}varList1=document.getelementbyid ("Linklist

For JS, I think everyone who just touches it should complain about why there is no way to get an element by class. Although the Getelementsbyclassname () function is already supported by a newer browser, it is not compatible with a lower version of the browser, and it has to be encapsulated in a way that is detached from other libraries. Method One function GetByClass1 (parent, CLS) { var res = []; The array containing the matching results

How to dynamically load javascript files and load javascript files using javascript How to dynamically load js files using javascript:Sometimes we need to dynamically load js files as needed. This chapter will briefly introduce how to implement this function, hoping to bring some help to friends who need it.I. Common loading methods: The above is a common meth

The HTML The above code will generate the following output in the HTML page: Hello World! Example: To insert Javascript into an HTML page, you need to use the can tell the browser where JavaScript starts and ends. Document. WriteA field is a standard JavaScript command used to write output to a page. After the document. Write command is input to the , the brow

JavaScript code placement location for javascript program development, JavaScript Program Development When JavaScript is used on pages, where should these JS Code be placed? Let's take a look. Generally, there are two ways to write on the interface and use. js files. 1.1 Head part on the Interface You can directly put

This article mainly introduces how to implement the inheritance of javascript and how to learn javascript object-oriented. If you are interested, refer to the examples in this article to introduce 6 methods for implementing the inheritance of javascript, the content is as follows: 1. [prototype chain inheritance]The essence of implementation is to override the p

Document directory Event example: Events are behaviors that can be detected by JavaScript.Event Javascript enables us to create dynamic pages. Events are behaviors that can be detected by JavaScript. Each element in the web page can generate events that can trigger JavaScript Functions. For example, when a user clicks a button, an onclick event is generated

interviewer usually wants to examine your understanding of JavaScript and DOM without the help of libraries (such as jQuery.Question #1: Event proxy When creating an application, you sometimes need to add event listeners to buttons, text, or images on the page. Some operations are triggered when the user interacts with these elements. We take a simple agent list as an example. The interviewer will tell you that they want to trigger an action when a u

If you only need to target modern browsers, many features can be implemented using native JavaScript.DOM Selectors// JQuery var ele = $ ("#id. Class");// native JavaScript var ele = Document.queryselectorall ("#id. Class");// or native JavaScript var ele1 = document.getElementById ("id"); var ele = Ele1.getelementsbyclassname ("Ele1");DOM operationsCreate element

1, var msg;//declare a variable, before assigning this variable a value, the variable is named: undefined 2, msg = "Hello";/Not applicable VAR can declare a global variable, but this variable because it is global, so it is easy to cause other calls some problems, it is not recommended 3. JavaScript has 5 basic data types, Undefined, Null, Boolean, number, and string; and a complex data type: Object 4, the Var num=076;//representative of the octal s

Document directory I. What is JavaScript? Ii. Start of JavaScript programming Iii. Implementation basics of JavaScript Iv. Summary of this Chapter From the beginning of college, I began to learn how to create web pages and began to access Javascript. Now I just feel that Ja