Name
String.charCodeAt( ) — get the nth character code from a string
Availability
JavaScript 1.2; JScript 5.5; ECMAScript v1
Synopsis
string
.charCodeAt(n
)
Arguments
-
n
The index of the character whose encoding is to be returned.
Returns
The Unicode encoding of the n
th character
within string
. This return value is a
16-bit integer between 0 and 65535.
Description
charCodeAt( )
is like charAt( )
except that it returns the character encoding at a specific location,
rather than returning a substring that contains the character itself.
If n
is negative or greater than or equal
to the string length, charCodeAt( )
returns
NaN
.
See String.fromCharCode( ) for a way to create a string from Unicode encodings.
Bugs
JavaScript 1.2 (as implemented by Netscape 4.0, for example) does not have full support for 16-bit Unicode characters and strings.
See Also
Get JavaScript: The Definitive Guide, Fourth Edition now with the O’Reilly learning platform.
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