JavaScript charAt() method: String Object


The charAt() method of the string object returns the specified character from a string.


Implemented in JavaScript 1.0




index : An integer between 0 and (length of the string - 1).


In the following web document, charAt() method displays various characters at different locations of a given string.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
<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 - charAt() method example</title>
<h1 style="color: red">JavaScript String object : charAt() method</h1>
<hr />
<script type="text/javascript">
//This is done to make the following JavaScript code compatible to XHTML. <![CDATA[
var str="Merits Of Computer Use";
document.write("The first character is: " + str.charAt(0) + "<br />");
document.write("The seventh character is: " + str.charAt(7) + "<br />");
document.write("The eleventh character is: " + str.charAt(10) + "<br />");
document.write("The last character is: " + str.charAt(21));

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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JavaScript: Tips of the Day

defineProperty method

const person = { name: 'Owen' };

Object.defineProperty(person, 'age', { value: 21 });


With the defineProperty method, we can add new properties to an object, or modify existing ones. When we add a property to an object using the defineProperty method, they are by default not enumerable. The Object.keys method returns all enumerable property names from an object, in this case only "name".
Properties added using the defineProperty method are immutable by default. You can override this behavior using the writable, configurable and enumerable properties. This way, the defineProperty method gives you a lot more control over the properties you're adding to an object.

Ref: https://bit.ly/323Y0P6


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