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						- # side-channel <sup>[![Version Badge][npm-version-svg]][package-url]</sup>
 - 
 - [![github actions][actions-image]][actions-url]
 - [![coverage][codecov-image]][codecov-url]
 - [![License][license-image]][license-url]
 - [![Downloads][downloads-image]][downloads-url]
 - 
 - [![npm badge][npm-badge-png]][package-url]
 - 
 - Store information about any JS value in a side channel. Uses WeakMap if available.
 - 
 - Warning: in an environment that lacks `WeakMap`, this implementation will leak memory until you `delete` the `key`.
 - 
 - ## Getting started
 - 
 - ```sh
 - npm install --save side-channel
 - ```
 - 
 - ## Usage/Examples
 - 
 - ```js
 - const assert = require('assert');
 - const getSideChannel = require('side-channel');
 - 
 - const channel = getSideChannel();
 - 
 - const key = {};
 - assert.equal(channel.has(key), false);
 - assert.throws(() => channel.assert(key), TypeError);
 - 
 - channel.set(key, 42);
 - 
 - channel.assert(key); // does not throw
 - assert.equal(channel.has(key), true);
 - assert.equal(channel.get(key), 42);
 - 
 - channel.delete(key);
 - assert.equal(channel.has(key), false);
 - assert.throws(() => channel.assert(key), TypeError);
 - ```
 - 
 - ## Tests
 - 
 - Clone the repo, `npm install`, and run `npm test`
 - 
 - [package-url]: https://npmjs.org/package/side-channel
 - [npm-version-svg]: https://versionbadg.es/ljharb/side-channel.svg
 - [deps-svg]: https://david-dm.org/ljharb/side-channel.svg
 - [deps-url]: https://david-dm.org/ljharb/side-channel
 - [dev-deps-svg]: https://david-dm.org/ljharb/side-channel/dev-status.svg
 - [dev-deps-url]: https://david-dm.org/ljharb/side-channel#info=devDependencies
 - [npm-badge-png]: https://nodei.co/npm/side-channel.png?downloads=true&stars=true
 - [license-image]: https://img.shields.io/npm/l/side-channel.svg
 - [license-url]: LICENSE
 - [downloads-image]: https://img.shields.io/npm/dm/side-channel.svg
 - [downloads-url]: https://npm-stat.com/charts.html?package=side-channel
 - [codecov-image]: https://codecov.io/gh/ljharb/side-channel/branch/main/graphs/badge.svg
 - [codecov-url]: https://app.codecov.io/gh/ljharb/side-channel/
 - [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/side-channel
 - [actions-url]: https://github.com/ljharb/side-channel/actions
 
 
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