trailblazer

trailblazer is a minimalist regular expression-generator for paths with named parameters. Turn a path such as /:foo/:bar? into a regular expression and extract the keys.

Installation

npm install trailblazer

API

Function compile

export const compile = (path: string, options: Options) => Compile;

• Create a regular expression from path and extract the key names.

import { compile } from 'trailblazer';

const path = '/foo/:bar';

const options = {
   sensitive: false,
   strict: false,
   start: true,
   end: true
};

const result = compile(path, options);

console.log(result.keys); // ['bar']
console.log(result.pattern); // /^\/foo\/([^\/]+)\/?$/i

result.pattern.test('/foo/123'); // true
result.pattern.exec('/foo/123'); // ['/foo/123', '123']

Type Options

type Options = {
    sensitive?: boolean;
    strict?: boolean;
    start?: boolean;
    end?: boolean;
}

• sensitive: When true, the RegExp will be case sensitive.

  • Default: false

• strict: When true, the RegExp allows an optional trailing slash to match.

  • Default: false

• start: When true, the RegExp will match from the beginning of the string.

  • Default: true

• end: When true, the RegExp will match to the end of the string.

  • Default: true

Type Compile

type Compile = {
    pattern: RegExp;
    keys: string[];
}

• pattern: The RegExp created for the input path.
• keys: An array of key names extracted from the input path.