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csset

Set operations for CSS selectors

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Install

npm install --save csset

Requirements

Although this lib has been tested using the node's test runner it should work in all node and browser environments that support Set and template literals.

Usage

Basic

import { Csset } from 'csset';

// Create your sets
const set1 = new Csset('div > p');
const set2 = new Csset('div');
const set3 = new Csset('p');

// Make set operations
// supersetOf
console.assert(set1.supersetOf(set2) === false);
console.assert(set2.supersetOf(set1) === false);
console.assert(set3.supersetOf(set1) === true);

// subsetOf
console.assert(set1.subsetOf(set3) === true);
console.assert(set1.subsetOf(set2) === false);

// union
console.assert(set1.union(set3).toString() === 'p');
console.assert(set1.union(set2).toString() === 'div > p, div');

// intersection
console.assert(set1.intersection(set3).toString() === 'div > p');
console.assert(set1.intersection(set2) === undefined); // void means empty set

Known issues & limitations

  • As for now pseudo selectors are not supported

Roadmap

  • Support for pseudo-classes
  • consider other set operations (diff, complementary, ...)

Release notes

[0.1.0]

  • BREAKING CHANGE: the package has been migrated from TypeScript to JavaScript + JsDocs for types. In this migration I've decided to make the package ESM only so require would fail to load the lib. The new flag --experimental-require-module can be used to load the lib if your app is in commonjs format. Checkout the docs.
  • Embed the parser into the lib
  • Add intersection API
  • Add empty properti to set class
  • Update demos

[0.0.10]

  • Use parsel-ts to tokenize selectors

[0.0.9]

  • Added build for ESM modules