70 lines
2.5 KiB
Markdown
70 lines
2.5 KiB
Markdown
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# globalThis <sup>[![Version Badge][npm-version-svg]][npm-url]</sup>
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[![Build Status][travis-svg]][travis-url]
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[![dependency status][deps-svg]][deps-url]
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[![dev dependency status][dev-deps-svg]][dev-deps-url]
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[![License][license-image]][license-url]
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[![Downloads][downloads-image]][downloads-url]
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[![npm badge][npm-badge-png]][npm-url]
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An ECMAScript spec-compliant polyfill/shim for `globalThis`. Invoke its "shim" method to shim `globalThis` if it is unavailable.
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This package implements the [es-shim API](https://github.com/es-shims/api) interface. It works in an ES3-supported environment and complies with the [spec proposal](https://github.com/tc39/proposal-global).
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Most common usage:
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```js
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var globalThis = require('globalThis')(); // returns native method if compliant
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/* or */
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var globalThis = require('globalThis/polyfill')(); // returns native method if compliant
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```
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## Example
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```js
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var assert = require('assert');
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// the below function is not CSP-compliant, but reliably gets the
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// global object in sloppy mode in every engine.
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var getGlobal = Function('return this');
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assert.equal(globalThis, getGlobal());
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```
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```js
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/* when `globalThis` is not present */
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var shimmedGlobal = require('globalthis').shim();
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/* or */
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var shimmedGlobal = require('globalthis/shim')();
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assert.equal(shimmedGlobal, globalThis);
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assert.equal(shimmedGlobal, getGlobal());
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```
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```js
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/* when `globalThis` is present */
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var shimmedGlobal = require('globalthis').shim();
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assert.equal(shimmedGlobal, globalThis);
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assert.equal(shimmedGlobal, getGlobal());
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```
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## Tests
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Simply clone the repo, `npm install`, and run `npm test`
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[npm-url]: https://npmjs.org/package/globalthis
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[npm-version-svg]: http://versionbadg.es/ljharb/globalThis.svg
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[travis-svg]: https://travis-ci.org/ljharb/globalThis.svg
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[travis-url]: https://travis-ci.org/ljharb/globalThis
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[deps-svg]: https://david-dm.org/ljharb/globalThis.svg?theme=shields.io
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[deps-url]: https://david-dm.org/ljharb/globalThis
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[dev-deps-svg]: https://david-dm.org/ljharb/globalThis/dev-status.svg?theme=shields.io
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[dev-deps-url]: https://david-dm.org/ljharb/globalThis#info=devDependencies
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[testling-png]: https://ci.testling.com/ljharb/globalThis.png
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[testling-url]: https://ci.testling.com/ljharb/globalThis
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[npm-badge-png]: https://nodei.co/npm/globalthis.png?downloads=true&stars=true
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[license-image]: http://img.shields.io/npm/l/globalthis.svg
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[license-url]: LICENSE
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[downloads-image]: http://img.shields.io/npm/dm/globalthis.svg
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[downloads-url]: http://npm-stat.com/charts.html?package=globalthis
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