https://github.com/ljharb/es-abstract

ECMAScript spec abstract operations.
https://github.com/ljharb/es-abstract

abstract abstract-operation ecmascript javascript operation spec specification

Last synced: 2 days ago
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ECMAScript spec abstract operations.

• Host: GitHub
• URL: https://github.com/ljharb/es-abstract
• Owner: ljharb
• License: mit
• Created: 2015-01-09T01:38:12.000Z (about 10 years ago)
• Default Branch: main
• Last Pushed: 2025-01-23T18:58:52.000Z (16 days ago)
• Last Synced: 2025-01-30T19:43:15.796Z (9 days ago)
• Topics: abstract, abstract-operation, ecmascript, javascript, operation, spec, specification
• Language: JavaScript
• Homepage:
• Size: 2.8 MB
• Stars: 117
• Watchers: 7
• Forks: 31
• Open Issues: 14
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • Funding: .github/FUNDING.yml
  • License: LICENSE

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ECMAScript spec abstract operations.

Every operation is available by edition/year and by name - for example, `es-abstract/2020/Call` gives you the `Call` operation from ES2020, `es-abstract/5/Type` gives you the `Type` operation from ES5.

All abstract operations are also available under an `es5`/`es2015`/`es2016`/`es2017`/`es2018`/`es2019`/`es2020`/`es2021` entry point, and as a property on the `main` export, but using deep imports is highly encouraged for bundle size and performance reasons. Non-deep entry points will be removed in the next semver-major release.

## Example

```js

var ES = require('es-abstract');

var assert = require('assert');

assert(ES.isCallable(function () {}));

assert(!ES.isCallable(/a/g));

```

## Tests

Simply clone the repo, `npm install`, and run `npm test`

## Security

Please email [@ljharb](https://github.com/ljharb) or see https://tidelift.com/security if you have a potential security vulnerability to report.

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