This method returns a number representing the Unicode value of the character at the given index.
Unicode code points range from 0 to 1114111. A direct match of the ASCII character encoding of the first 128 Unicode code points. charCodeAt() will always return a value less than 65,536.
Grammar
string.charCodeAt(index);
Here are the details of the parameters:
Return value:
Returns a number representing the Unicode value of the character at the given index. If the given index is not a length between 0 and 1, NaN is returned.
Example:
<html>
<head>
<title>JavaScript String charCodeAt() Method</title>
</head>
<body>
<script type="text/javascript">
var str = new String( "This is string" );
document.write("str.charCodeAt(0) is:" + str.charCodeAt(0));
document.write("<br />str.charCodeAt(1) is:" + str.charCodeAt(1));
document.write("<br />str.charCodeAt(2) is:" + str.charCodeAt(2));
document.write("<br />str.charCodeAt(3) is:" + str.charCodeAt(3));
document.write("<br />str.charCodeAt(4) is:" + str.charCodeAt(4));
document.write("<br />str.charCodeAt(5) is:" + str.charCodeAt(5));
</script>
</body>
</html>
This will produce the following results:
str.charCodeAt(0) is:84 str.charCodeAt(1) is:104 str.charCodeAt(2) is:105 str.charCodeAt(3) is:115 str.charCodeAt(4) is:32 str.charCodeAt(5) is:105
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