@stdlib/utils/extname/README.md

Standard utilities.

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# Filename Extension

> Return a filename extension.

<section class="usage">

## Usage

```javascript
var extname = require( '@stdlib/utils/extname' );
```

#### extname( filename )

Returns a filename extension.

```javascript
var ext = extname( 'index.js' );
// returns '.js'
```

</section>

<!-- /.usage -->

<section class="examples">

## Examples

<!-- eslint-disable node/no-sync -->

<!-- eslint no-undef: "error" -->

```javascript
var statSync = require( 'fs' ).statSync;
var path = require( 'path' );
var readDir = require( '@stdlib/fs/read-dir' ).sync;
var extname = require( '@stdlib/utils/extname' );

var files;
var fpath;
var base;
var stat;
var ext;
var i;

base = path.resolve( __dirname, '..' );
files = readDir( base );

for ( i = 0; i < files.length; i++ ) {
    fpath = path.join( base, files[ i ] );
    stat = statSync( fpath );
    if ( !stat.isDirectory() ) {
        ext = extname( fpath );
        console.log( '%s --> %s', fpath, ext || '(no ext)' );
    }
}
```

</section>

<!-- /.examples -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/utils/dirname`][@stdlib/utils/dirname]</span><span class="delimiter">: </span><span class="description">return a directory name.</span>

</section>

<!-- /.related -->

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<section class="links">

<!-- <related-links> -->

[@stdlib/utils/dirname]: https://github.com/stdlib-js/utils/tree/main/dirname

<!-- </related-links> -->

</section>

<!-- /.links -->