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Editing: README.md
# side-channel-weakmap <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: this implementation will leak memory until you `delete` the `key`. Use [`side-channel`](https://npmjs.com/side-channel) for the best available strategy. ## Getting started ```sh npm install --save side-channel-weakmap ``` ## Usage/Examples ```js const assert = require('assert'); const getSideChannelList = require('side-channel-weakmap'); const channel = getSideChannelList(); 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-weakmap [npm-version-svg]: https://versionbadg.es/ljharb/side-channel-weakmap.svg [deps-svg]: https://david-dm.org/ljharb/side-channel-weakmap.svg [deps-url]: https://david-dm.org/ljharb/side-channel-weakmap [dev-deps-svg]: https://david-dm.org/ljharb/side-channel-weakmap/dev-status.svg [dev-deps-url]: https://david-dm.org/ljharb/side-channel-weakmap#info=devDependencies [npm-badge-png]: https://nodei.co/npm/side-channel-weakmap.png?downloads=true&stars=true [license-image]: https://img.shields.io/npm/l/side-channel-weakmap.svg [license-url]: LICENSE [downloads-image]: https://img.shields.io/npm/dm/side-channel-weakmap.svg [downloads-url]: https://npm-stat.com/charts.html?package=side-channel-weakmap [codecov-image]: https://codecov.io/gh/ljharb/side-channel-weakmap/branch/main/graphs/badge.svg [codecov-url]: https://app.codecov.io/gh/ljharb/side-channel-weakmap/ [actions-image]: https://img.shields.io/endpoint?url=https://github-actions-badge-u3jn4tfpocch.runkit.sh/ljharb/side-channel-weakmap [actions-url]: https://github.com/ljharb/side-channel-weakmap/actions
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