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css-what

a CSS selector parser

# Example

const CSSwhat = require("css-what")
CSSwhat.parse("foo[bar]:baz")
~> [
[
{ type: "tag", name: "foo" },
{
type: "attribute",
name: "bar",
action: "exists",
value: "",
ignoreCase: false
},
{ type: "pseudo", name: "baz", data: null }
]
]

# API

**`CSSwhat.parse(str, options)` - Parses `str`, optionally with the passed `options`.**

The function returns a two-dimensional array. The first array represents selectors separated by commas (eg. `sub1, sub2`), the second contains the relevant tokens for that selector. Possible token types are:

name | attributes | example | output
--- | --- | --- | ---
`tag` | `name` | `div` | ‘{ type: 'tag’, name: 'div' }`\ilinebr </td> </tr> <tr class="markdownTableRowEven"> <td class="markdownTableBodyNone">`universal`\ilinebr </td> <td class="markdownTableBodyNone"> - \ilinebr </td> <td class="markdownTableBodyNone">`*`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'universal' }`\ilinebr </td> </tr> <tr class="markdownTableRowOdd"> <td class="markdownTableBodyNone">`pseudo`\ilinebr </td> <td class="markdownTableBodyNone">`name`,`data`\ilinebr </td> <td class="markdownTableBodyNone">`:name(data)`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'pseudo', name: 'name', data: 'data' }`\ilinebr </td> </tr> <tr class="markdownTableRowEven"> <td class="markdownTableBodyNone">`pseudo`\ilinebr </td> <td class="markdownTableBodyNone">`name`,`data`\ilinebr </td> <td class="markdownTableBodyNone">`:name`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'pseudo', name: 'name', data: null }`\ilinebr </td> </tr> <tr class="markdownTableRowOdd"> <td class="markdownTableBodyNone">`pseudo-element`\ilinebr </td> <td class="markdownTableBodyNone">`name`\ilinebr </td> <td class="markdownTableBodyNone">`::name<tt>\ilinebr </td> <td class="markdownTableBodyNone">{ type: 'pseudo-element', name: 'name' }`\ilinebr </td> </tr> <tr class="markdownTableRowEven"> <td class="markdownTableBodyNone">`attribute`\ilinebr </td> <td class="markdownTableBodyNone">`name`,`action`,`value`,`ignoreCase`\ilinebr </td> <td class="markdownTableBodyNone">`[attr]`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'attribute', name: 'attr', action: 'exists', value: '', ignoreCase: false }`\ilinebr </td> </tr> <tr class="markdownTableRowOdd"> <td class="markdownTableBodyNone">`attribute`\ilinebr </td> <td class="markdownTableBodyNone">`name`,`action`,`value`,`ignoreCase`\ilinebr </td> <td class="markdownTableBodyNone">`[attr=val]`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'attribute', name: 'attr', action: 'equals', value: 'val', ignoreCase: false }`\ilinebr </td> </tr> <tr class="markdownTableRowEven"> <td class="markdownTableBodyNone">`attribute`\ilinebr </td> <td class="markdownTableBodyNone">`name`,`action`,`value`,`ignoreCase`\ilinebr </td> <td class="markdownTableBodyNone">`[attr^=val]`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'attribute', name: 'attr', action: 'start', value: 'val', ignoreCase: false }`\ilinebr </td> </tr> <tr class="markdownTableRowOdd"> <td class="markdownTableBodyNone">`attribute`\ilinebr </td> <td class="markdownTableBodyNone">`name`,`action`,`value`,`ignoreCase`\ilinebr </td> <td class="markdownTableBodyNone">`[attr$=val]`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'attribute', name: 'attr', action: 'end', value: 'val', ignoreCase: false }`\ilinebr </td> </tr> <tr class="markdownTableRowEven"> <td class="markdownTableBodyNone">`child`\ilinebr </td> <td class="markdownTableBodyNone"> - \ilinebr </td> <td class="markdownTableBodyNone">`>`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'child' }`\ilinebr </td> </tr> <tr class="markdownTableRowOdd"> <td class="markdownTableBodyNone">`parent`\ilinebr </td> <td class="markdownTableBodyNone"> - \ilinebr </td> <td class="markdownTableBodyNone">`<`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'parent' }`\ilinebr </td> </tr> <tr class="markdownTableRowEven"> <td class="markdownTableBodyNone">`sibling`\ilinebr </td> <td class="markdownTableBodyNone"> - \ilinebr </td> <td class="markdownTableBodyNone">`~`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'sibling' }`\ilinebr </td> </tr> <tr class="markdownTableRowOdd"> <td class="markdownTableBodyNone">`adjacent`\ilinebr </td> <td class="markdownTableBodyNone"> - \ilinebr </td> <td class="markdownTableBodyNone">`+`\ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'adjacent' }`\ilinebr </td> </tr> <tr class="markdownTableRowEven"> <td class="markdownTableBodyNone">`descendant`\ilinebr </td> <td class="markdownTableBodyNone"> - \ilinebr </td> <td class="markdownTableBodyNone"> \ilinebr </td> <td class="markdownTableBodyNone">`{ type: 'descendant' }`

Options:

- `lowerCaseTags`: When false, tag names will not be lowercased. Defaults to `true`.
- `lowerCaseAttributeNames`: When false, attribute names will not be lowercased. Defaults to `true`.
- `xmlMode`: When `true`, `xmlMode` implies both `lowerCaseTags` and `lowerCaseAttributeNames` are set to `false`.

**`CSSwhat.stringify(selector)` - Turns `selector` back into a string.**

License: BSD-2-Clause

# Security contact information

To report a security vulnerability, please use the Tidelift security contact. Tidelift will coordinate the fix and disclosure.

# <tt>css-what</tt> for enterprise

Available as part of the Tidelift Subscription

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