JavaScript lastIndexOf() Method: String Object


The lastIndexOf() method returns the index within the calling string object of the last occurrence of the specified value. It returns -1 if not found. The calling string is search in reverse order, starting at startIndex.


Implemented in JavaScript 1.0


lastIndexOf(searchValue, startIndex) 


searchValue :  A string representing the value to search for.

startIndex  : The location in the string to search the specified value. Location value is an integer between 0 and the length of the string. The default value is 0.


In the following web document lastIndexOf() method is used to locate values in a given string.

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<meta http-equiv="content-type" content="text/html; charset=iso-8859-1" />
<title>JavaScript String object - lastIndexOf() method example</title>
<h1 style="color: red">JavaScript String object : lastIndexOf() method</h1>
<hr />
<script type="text/javascript">
//This is done to make the following JavaScript code compatible to XHTML. <![CDATA[
var str="Learn Javascript";
document.write(str.lastIndexOf("Learn") + "<br />");
document.write(str.lastIndexOf("Javascript")+"<br />");

View the example in the browser

Supported Browser

Internet Explorer 7 Firefox 3.6 Google Chrome 7 Safari 5.0.1 Opera 10
Yes Yes Yes Yes Yes

See also:

JavaScript Core objects, methods, properties.

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