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137 lines
3.5 KiB
Markdown
137 lines
3.5 KiB
Markdown
# hast-util-parse-selector
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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 create an [*element*][element] from a simple CSS
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selector.
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## Install
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[npm][]:
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```sh
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npm install hast-util-parse-selector
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```
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## Use
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```js
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var parseSelector = require('hast-util-parse-selector')
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console.log(parseSelector('.quux#bar.baz.qux'))
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```
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Yields:
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```js
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{ type: 'element',
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tagName: 'div',
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properties: { id: 'bar', className: [ 'quux', 'baz', 'qux' ] },
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children: [] }
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```
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## API
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### `parseSelector([selector][, defaultTagName])`
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Create an [*element*][element] [*node*][node] from a simple CSS selector.
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###### `selector`
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`string`, optional — Can contain a tag-name (`foo`), classes (`.bar`),
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and an ID (`#baz`).
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Multiple classes are allowed.
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Uses the last ID if multiple IDs are found.
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###### `defaultTagName`
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`string`, optional, defaults to `div` — Tag name to use if `selector` does not
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specify one.
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###### Returns
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[`Element`][element].
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## Security
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Improper use of the `selector` or `defaultTagName` can open you up to a
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[cross-site scripting (XSS)][xss] attack as the value of `tagName`, when
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resolving to `script`, injects a `script` element into the syntax tree.
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Do not use user input in `selector` or use [`hast-util-santize`][sanitize].
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## Related
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* [`hast-util-from-selector`](https://github.com/syntax-tree/hast-util-from-selector)
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— parse complex CSS selectors to nodes
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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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<!-- Definitions -->
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[build-badge]: https://img.shields.io/travis/syntax-tree/hast-util-parse-selector.svg
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[build]: https://travis-ci.org/syntax-tree/hast-util-parse-selector
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[coverage-badge]: https://img.shields.io/codecov/c/github/syntax-tree/hast-util-parse-selector.svg
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[coverage]: https://codecov.io/github/syntax-tree/hast-util-parse-selector
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[downloads-badge]: https://img.shields.io/npm/dm/hast-util-parse-selector.svg
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[downloads]: https://www.npmjs.com/package/hast-util-parse-selector
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[size-badge]: https://img.shields.io/bundlephobia/minzip/hast-util-parse-selector.svg
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[size]: https://bundlephobia.com/result?p=hast-util-parse-selector
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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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[xss]: https://en.wikipedia.org/wiki/Cross-site_scripting
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[sanitize]: https://github.com/syntax-tree/hast-util-sanitize
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