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173 lines
5.6 KiB
Text
173 lines
5.6 KiB
Text
# hast-util-has-property
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[![Build][build-badge]][build]
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[![Coverage][coverage-badge]][coverage]
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[![Downloads][downloads-badge]][downloads]
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[![Size][size-badge]][size]
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[![Sponsors][sponsors-badge]][collective]
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[![Backers][backers-badge]][collective]
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[![Chat][chat-badge]][chat]
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[**hast**][hast] utility to check if an [*element*][element] has a
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[*property*][property].
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## Install
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This package is [ESM only](https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c):
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Node 12+ is needed to use it and it must be `import`ed instead of `require`d.
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[npm][]:
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```sh
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npm install hast-util-has-property
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```
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## Use
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```js
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import {hasProperty} from 'hast-util-has-property'
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hasProperty({type: 'text', value: 'alpha'}, 'bravo') // => false
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hasProperty(
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{
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type: 'element',
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tagName: 'div',
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properties: {id: 'bravo'},
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children: []
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},
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'className'
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) // => false
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hasProperty(
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{
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type: 'element',
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tagName: 'div',
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properties: {id: 'charlie'},
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children: []
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},
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'id'
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) // => true
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```
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## API
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This package exports the following identifiers: `hasProperty`.
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There is no default export.
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### `hasProperty(node, name)`
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Check if `node` is an [*element*][element] that has a `name`
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[*property name*][property].
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###### Parameters
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* `node` ([`Node`][node], optional) — [*Node*][node] to check
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* `name` (`string`) - [*Property name*][property]
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###### Returns
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`boolean` — Whether `node` is an [*element*][element] that has a `name`
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[*property name*][property].
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## Security
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`hast-util-has-property` does not change the syntax tree so there are no
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openings for [cross-site scripting (XSS)][xss] attacks.
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## Related
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* [`hast-util-is-element`](https://github.com/syntax-tree/hast-util-is-element)
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— check if a node is a (certain) element
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* [`hast-util-is-body-ok-link`](https://github.com/rehypejs/rehype-minify/tree/HEAD/packages/hast-util-is-body-ok-link)
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— check if a node is “Body OK” link element
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* [`hast-util-is-conditional-comment`](https://github.com/rehypejs/rehype-minify/tree/HEAD/packages/hast-util-is-conditional-comment)
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— check if a node is a conditional comment
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* [`hast-util-is-css-link`](https://github.com/rehypejs/rehype-minify/tree/HEAD/packages/hast-util-is-css-link)
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— check if a node is a CSS link element
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* [`hast-util-is-css-style`](https://github.com/rehypejs/rehype-minify/tree/HEAD/packages/hast-util-is-css-style)
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— check if a node is a CSS style element
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* [`hast-util-embedded`](https://github.com/syntax-tree/hast-util-embedded)
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— check if a node is an embedded element
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* [`hast-util-heading`](https://github.com/syntax-tree/hast-util-heading)
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— check if a node is a heading element
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* [`hast-util-interactive`](https://github.com/syntax-tree/hast-util-interactive)
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— check if a node is interactive
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* [`hast-util-is-javascript`](https://github.com/rehypejs/rehype-minify/tree/HEAD/packages/hast-util-is-javascript)
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— check if a node is a JavaScript script element
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* [`hast-util-labelable`](https://github.com/syntax-tree/hast-util-labelable)
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— check whether a node is labelable
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* [`hast-util-phrasing`](https://github.com/syntax-tree/hast-util-phrasing)
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— check if a node is phrasing content
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* [`hast-util-script-supporting`](https://github.com/syntax-tree/hast-util-script-supporting)
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— check if a node is a script-supporting element
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* [`hast-util-sectioning`](https://github.com/syntax-tree/hast-util-sectioning)
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— check if a node is a sectioning element
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* [`hast-util-transparent`](https://github.com/syntax-tree/hast-util-transparent)
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— check if a node is a transparent element
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* [`hast-util-whitespace`](https://github.com/syntax-tree/hast-util-whitespace)
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— check if a node is inter-element whitespace
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## Contribute
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See [`contributing.md` in `syntax-tree/.github`][contributing] for ways to get
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started.
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See [`support.md`][support] for ways to get help.
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This project has a [code of conduct][coc].
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By interacting with this repository, organization, or community you agree to
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abide by its terms.
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## License
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[MIT][license] © [Titus Wormer][author]
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<!-- Definition -->
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[build-badge]: https://github.com/syntax-tree/hast-util-has-property/workflows/main/badge.svg
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[build]: https://github.com/syntax-tree/hast-util-has-property/actions
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[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/hast-util-has-property.svg
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[coverage]: https://codecov.io/github/syntax-tree/hast-util-has-property
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[downloads-badge]: https://img.shields.io/npm/dm/hast-util-has-property.svg
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[downloads]: https://www.npmjs.com/package/hast-util-has-property
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[size-badge]: https://img.shields.io/bundlephobia/minzip/hast-util-has-property.svg
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[size]: https://bundlephobia.com/result?p=hast-util-has-property
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[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg
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[backers-badge]: https://opencollective.com/unified/backers/badge.svg
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[collective]: https://opencollective.com/unified
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[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg
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[chat]: https://github.com/syntax-tree/unist/discussions
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[npm]: https://docs.npmjs.com/cli/install
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[license]: license
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[author]: https://wooorm.com
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[contributing]: https://github.com/syntax-tree/.github/blob/HEAD/contributing.md
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[support]: https://github.com/syntax-tree/.github/blob/HEAD/support.md
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[coc]: https://github.com/syntax-tree/.github/blob/HEAD/code-of-conduct.md
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[hast]: https://github.com/syntax-tree/hast
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[node]: https://github.com/syntax-tree/hast#nodes
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[element]: https://github.com/syntax-tree/hast#element
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[property]: https://github.com/syntax-tree/hast#property-names
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[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting
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