hast-util-has-property

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[hast][] utility to check if an element has a certain property.

Contents

* What is this?
* When should I use this?
* Install
* Use
* API
* hasProperty(node, field)
* Types
* Compatibility
* Security
* Related
* Contribute
* License

What is this?

This package is a small utility that checks if a node is an element that has
a given property.

When should I use this?

This utility is super niche, if you’re here you probably know what you’re
looking for!

Install

This package is [ESM only][esm].
In Node.js (version 16+), install with [npm][]:

``sh
npm install hast-util-has-property
`

In Deno with [esm.sh][esmsh]:

`js
import {hasProperty} from 'https://esm.sh/hast-util-has-property@3'
`

In browsers with [esm.sh][esmsh]:

`html

`

Use

`js
import {hasProperty} from 'hast-util-has-property'

hasProperty({type: 'text', value: 'alpha'}, 'bravo') // => false

hasProperty(
{
type: 'element',
tagName: 'div',
properties: {id: 'bravo'},
children: []
},
'className'
) // => false

hasProperty(
{
type: 'element',
tagName: 'div',
properties: {id: 'charlie'},
children: []
},
'id'
) // => true
`

API

This package exports the identifier [hasProperty][api-has-property].
There is no default export.

$3

Check if nodeis an element and has a name property.

###### Parameters

* node (Node) — node to check (typically [Element][element])
* name (string) - property name to check

###### Returns

Whether node is an element that has a name property (boolean).

Types

This package is fully typed with [TypeScript][].
It exports no additional types.

Compatibility

Projects maintained by the unified collective are compatible with maintained
versions of Node.js.

When we cut a new major release, we drop support for unmaintained versions of
Node.
This means we try to keep the current release line,
hast-util-has-property@^3, compatible with Node.js 16.

Security

hast-util-has-property does not change the syntax tree so there are no
openings for [cross-site scripting (XSS)][xss] attacks.

Related

* hast-util-is-element
— check if a node is a (certain) element
* hast-util-is-body-ok-link
— check if a node is “Body OK” link element
* hast-util-is-conditional-comment
— check if a node is a conditional comment
* hast-util-is-css-link
— check if a node is a CSS link element
* hast-util-is-css-style
— check if a node is a CSS style element
* hast-util-embedded
— check if a node is an embedded element
* hast-util-heading
— check if a node is a heading element
* hast-util-interactive
— check if a node is interactive
* hast-util-is-javascript
— check if a node is a JavaScript script element
* hast-util-labelable
— check whether a node is labelable
* hast-util-phrasing
— check if a node is phrasing content
* hast-util-script-supporting
— check if a node is a script-supporting element
* hast-util-sectioning
— check if a node is a sectioning element
* hast-util-transparent
— check if a node is a transparent element
* hast-util-whitespace
— check if a node is inter-element whitespace

Contribute

See [contributing.md][contributing] in [syntax-tree/.github][health] for
ways to get started.
See [support.md`][support] for ways to get help.

This project has a [code of conduct][coc].
By interacting with this repository, organization, or community you agree to
abide by its terms.

License

[MIT][license] © [Titus Wormer][author]

[build-badge]: https://github.com/syntax-tree/hast-util-has-property/workflows/main/badge.svg

[build]: https://github.com/syntax-tree/hast-util-has-property/actions

[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/hast-util-has-property.svg

[coverage]: https://codecov.io/github/syntax-tree/hast-util-has-property

[downloads-badge]: https://img.shields.io/npm/dm/hast-util-has-property.svg

[downloads]: https://www.npmjs.com/package/hast-util-has-property

[size-badge]: https://img.shields.io/badge/dynamic/json?label=minzipped%20size&query=$.size.compressedSize&url=https://deno.bundlejs.com/?q=hast-util-has-property

[size]: https://bundlejs.com/?q=hast-util-has-property

[sponsors-badge]: https://opencollective.com/unified/sponsors/badge.svg

[backers-badge]: https://opencollective.com/unified/backers/badge.svg

[collective]: https://opencollective.com/unified

[chat-badge]: https://img.shields.io/badge/chat-discussions-success.svg

[chat]: https://github.com/syntax-tree/unist/discussions

[npm]: https://docs.npmjs.com/cli/install

[esm]: https://gist.github.com/sindresorhus/a39789f98801d908bbc7ff3ecc99d99c

[esmsh]: https://esm.sh

[typescript]: https://www.typescriptlang.org

[license]: license

[author]: https://wooorm.com

[health]: https://github.com/syntax-tree/.github

[contributing]: https://github.com/syntax-tree/.github/blob/main/contributing.md

[support]: https://github.com/syntax-tree/.github/blob/main/support.md

[coc]: https://github.com/syntax-tree/.github/blob/main/code-of-conduct.md

[hast]: https://github.com/syntax-tree/hast

[element]: https://github.com/syntax-tree/hast#element

[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting

[api-has-property]: #haspropertynode-field