PHP's dirname in TypeScript

How to use

Install via yarn add locutus and import: import { dirname } from 'locutus/php/filesystem/dirname'.

Or with CommonJS: const { dirname } = require('locutus/php/filesystem/dirname')

Use a bundler that supports tree-shaking so you only ship the functions you actually use. Vite, webpack, Rollup, and Parcel all handle this. For server-side use this is less of a concern.

Examples

These examples are extracted from test cases that automatically verify our functions against their native counterparts.

#	code	expected result
1	dirname('/etc/passwd')	'/etc'
2	dirname('c:/Temp/x')	'c:/Temp'
3	dirname('/dir/test/')	'/dir'

Here's what our current TypeScript equivalent to PHP's dirname looks like.

TSTypeScript JSJavaScript TSStandalone TS JSStandalone JS

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export function dirname(path: string): string {
  //      discuss at: https://locutus.io/php/dirname/
  // parity verified: PHP 8.3
  //     original by: Ozh
  //     improved by: XoraX (https://www.xorax.info)
  //       example 1: dirname('/etc/passwd')
  //       returns 1: '/etc'
  //       example 2: dirname('c:/Temp/x')
  //       returns 2: 'c:/Temp'
  //       example 3: dirname('/dir/test/')
  //       returns 3: '/dir'

  return path.replace(/\\/g, '/').replace(/\/[^/]*\/?$/, '')
}

export function dirname(path) {
  //      discuss at: https://locutus.io/php/dirname/
  // parity verified: PHP 8.3
  //     original by: Ozh
  //     improved by: XoraX (https://www.xorax.info)
  //       example 1: dirname('/etc/passwd')
  //       returns 1: '/etc'
  //       example 2: dirname('c:/Temp/x')
  //       returns 2: 'c:/Temp'
  //       example 3: dirname('/dir/test/')
  //       returns 3: '/dir'

  return path.replace(/\\/g, '/').replace(/\/[^/]*\/?$/, '')
}

Improve this function

Locutus is a community effort following The McDonald's Theory: we ship first iterations, hoping others will improve them. If you see something that could be better, we'd love your contribution.

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