hast-util-parse-selector

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[hast][] utility to create an element from a simple CSS selector.

Contents

* What is this?
* When should I use this?
* Install
* Use
* API
* [parseSelector(selector?[, defaultTagName])](#parseselectorselector-defaulttagname)
* Types
* Compatibility
* Security
* Related
* Contribute
* License

What is this?

This package is a tiny utility that helps create elements.

When should I use this?

This utility is super niche.
You probably want the more powerful [hastscript][hastscript] or
[hast-util-from-selector][hast-util-from-selector]

Install

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

``sh
npm install hast-util-parse-selector
`

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

`js
import {parseSelector} from 'https://esm.sh/hast-util-parse-selector@4'
`

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

`html

`

Use

`js
import {parseSelector} from 'hast-util-parse-selector'

console.log(parseSelector('.quux#bar.baz.qux'))
`

Yields:

`js
{ type: 'element',
tagName: 'div',
properties: { id: 'bar', className: [ 'quux', 'baz', 'qux' ] },
children: [] }
`

API

This package exports the identifier [parseSelector][api-parse-selector].
There is no default export.

$3

Create a hast element from a simple CSS selector.

###### Parameters

* selector (string, optional)
— simple CSS selector, can contain a tag name (foo), classes (.bar),
and an ID (#baz), multiple classes are allowed, uses the last ID if
multiple IDs are found
* defaultTagName (string, default: 'div')
— tag name to use if selector does not specify one

###### Returns

Built element ([Element][element]).

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-parse-selector@^4, compatible with Node.js 16.

Security

Improper use of the selector or defaultTagName can open you up to a
[cross-site scripting (XSS)][xss] attack as the value of tagName, when
resolving to script, injects a script element into the syntax tree.

Do not use user input in selector or use
[hast-util-santize][hast-util-sanitize].

Related

* hast-util-from-selector
— parse complex CSS selectors to nodes

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-parse-selector/workflows/main/badge.svg

[build]: https://github.com/syntax-tree/hast-util-parse-selector/actions

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

[coverage]: https://codecov.io/github/syntax-tree/hast-util-parse-selector

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

[downloads]: https://www.npmjs.com/package/hast-util-parse-selector

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

[size]: https://bundlejs.com/?q=hast-util-parse-selector

[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

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

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

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

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

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

[api-parse-selector]: #parseselectorselector-defaulttagname