@gpa/extract-params-from-path

Extract the parameters declared in an express path specification using the Typescript type system. Used to compute the list of available path parameters in a router in @gpa/type-safe-express.

The runtime path parameter parser of express is implemented in path-to-regexp, this library is compatible with:

@gpa/extract-params-from-path version	express version	path-to-regexp version
0.x	4.0-5.0.0-alpha.8	0.x
1.x	5.0.0-beta.1-5.0.0-beta.3	3.2.0 (through router@2.0.0-beta.1)
2.x	from 5.0.0	8.x (through router@2.0.0-beta.2)

Table of Contents

1. Installation
2. Requirements
3. Usage
4. API

Installation

npm install @gpa/extract-params-from-path

Requirements

• Node.js >= 18

• typescript >= 5.0 (optional)

Usage

import { ExtractParamsFromPath } from '@gpa/extract-params-from-path';

function router<Path extends string>(path: Path, handler: (request: { params: ExtractParamsFromPath<Path> }) => void) {}

router('/path/:pathParam', (req) => {
  // req.params is { pathParam: string }
});

API

ExtractParamsFromPath<Path extends string>

<Path>

Type: string

The path to extract the parameters from.