hast-util-parse-selector

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])
• 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 or hast-util-from-selector

Install

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

1npm install hast-util-parse-selector

In Deno with esm.sh:

1import {parseSelector} from 'https://esm.sh/hast-util-parse-selector@4'

In browsers with esm.sh:

1<script type="module">
2  import {parseSelector} from 'https://esm.sh/hast-util-parse-selector@4?bundle'
3</script>

Use

1import {parseSelector} from 'hast-util-parse-selector'
2
3console.log(parseSelector('.quux#bar.baz.qux'))

Yields:

1{ type: 'element',
2  tagName: 'div',
3  properties: { id: 'bar', className: [ 'quux', 'baz', 'qux' ] },
4  children: [] }

API

This package exports the identifier parseSelector. There is no default export.

parseSelector(selector?[, defaultTagName])

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).

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) 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.

Related

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

Contribute

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

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

License

MIT © Titus Wormer