pattern-key-compare

pattern-key-compare

Implementation of PATTERN_KEY_COMPARE of Node.js resolver algorithm.

It implements the updated algorithm:

PATTERN_KEY_COMPARE(keyA, keyB)

1. Assert: keyA contains only a single "*".
2. Assert: keyB contains only a single "*".
3. Let baseLengthA be the index of "*" in keyA plus one.
4. Let baseLengthB be the index of "*" in keyB plus one.
5. If baseLengthA is greater than baseLengthB, return -1.
6. If baseLengthB is greater than baseLengthA, return 1.
7. If the length of keyA is greater than the length of keyB, return -1.
8. If the length of keyB is greater than the length of keyA, return 1.
9. Return 0.

Notes

Assert: keyA/B ends with "/" or contains only a single "*"

Note that this is not correct as nowadays it supports file extensions. e.g.:

• #a/b.js
• ./foo/*.js

Install

# npm
npm install pattern-key-compare

# yarn
yarn add pattern-key-compare

# pnpm
pnpm add pattern-key-compare

# rush
rush add -p pattern-key-compare

Usage

import { patternKeyCompare } from 'pattern-key-compare'

[...].sort(patternKeyCompare)