Filename Extension

Regular expression to capture a filename extension.

Usage

var reExtname = require( '@stdlib/regexp/extname' );

reExtname( [platform] )

Returns a regular expression to capture a filename extension.

var RE = reExtname();
// returns <RegExp>

RE = reExtname( 'posix' );
// returns <RegExp>

var ext = RE.exec( '/foo/bar/index.js' )[ 1 ];
// returns '.js'

RE = reExtname( 'win32' );
// returns <RegExp>

ext = RE.exec( 'C:\\foo\\bar\\index.js' )[ 1 ];
// returns '.js'

reExtname.REGEXP

Regular expression to capture a filename extension.

var bool = ( reExtname.REGEXP.toString() === reExtname().toString() );
// returns true

reExtname.REGEXP_POSIX

Regular expression to capture a POSIX filename extension.

var ext = reExtname.REGEXP_POSIX.exec( '/foo/bar/index.js' )[ 1 ];
// returns '.js'

reExtname.REGEXP_WIN32

Regular expression to capture a Windows filename extension.

var ext = reExtname.REGEXP_WIN32.exec( 'C:\\foo\\bar\\index.js' )[ 1 ];
// returns '.js'

Notes

The as REGEXP exported regular expression is platform-dependent. If the current process is running on Windows, REGEXP === REGEXP_WIN32; otherwise, REGEXP === REGEXP_POSIX.

Examples

var reExtname = require( '@stdlib/regexp/extname' );
var RE_EXTNAME = reExtname();
var ext;

// Assuming a POSIX platform...
ext = RE_EXTNAME.exec( '/foo/bar/index.js' )[ 1 ];
// returns '.js'

ext = reExtname.REGEXP_WIN32.exec( '/foo/bar/home.html' )[ 1 ];
// returns '.html'

ext = reExtname.REGEXP_WIN32.exec( 'C:\\foo\\bar\\home.html' )[ 1 ];
// returns '.html'