https://github.com/niksy/babel-plugin-transform-object-hasown

Babel plugin for transforming `Object.hasOwn`.
https://github.com/niksy/babel-plugin-transform-object-hasown

Last synced: about 2 months ago
JSON representation

Babel plugin for transforming `Object.hasOwn`.

• Host: GitHub
• URL: https://github.com/niksy/babel-plugin-transform-object-hasown
• Owner: niksy
• License: mit
• Created: 2021-05-26T10:51:04.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2021-06-05T20:43:22.000Z (over 3 years ago)
• Last Synced: 2024-10-18T04:06:01.809Z (2 months ago)
• Language: JavaScript
• Size: 9.77 KB
• Stars: 1
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • Changelog: CHANGELOG.md
  • License: LICENSE.md

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README

        
# babel-plugin-transform-object-hasown

[![Build Status][ci-img]][ci]

Babel plugin for transforming

[`Object.hasOwn`](https://github.com/tc39/proposal-accessible-object-hasownproperty).

## Install

```sh

npm install babel-plugin-transform-object-hasown --save-dev

```

## Usage

Use it via available [plugin activation options][babel-plugins].

For `.babelrc` file:

```json

{

	"plugins": ["babel-plugin-transform-object-hasown"]

}

```

Then, in your code:

```js

const object = {};

if (Object.hasOwn(object, 'becky')) {

	console.log('has property becky');

}

```

After transformation:

```js

var _objectHasOwn = function (object, property) {

	if (typeof object === 'undefined' || object === null) {

		throw new TypeError('Cannot convert undefined or null to object');

	}

	return Object.prototype.hasOwnProperty.call(Object(object), property);

};

const object = {};

if (_objectHasOwn(object, 'becky')) {

	console.log('has property becky');

}

```

Check test fixtures ([actual](test/fixtures/all.js) and

[expected](test/fixtures/all.expected.js)) for more examples.

## Caveats

Will only work with code of the form `Object.hasOwn` or `Object['hasOwn']`.

## License

MIT © [Ivan Nikolić](http://ivannikolic.com)

[ci]: https://travis-ci.com/niksy/babel-plugin-transform-object-hasown

[ci-img]: https://travis-ci.com/niksy/babel-plugin-transform-object-hasown.svg?branch=master

[babel-plugins]: http://babeljs.io/docs/plugins/