css-what/readme.md

# css-what [![Build Status](https://secure.travis-ci.org/fb55/css-what.svg?branch=master)](http://travis-ci.org/fb55/css-what)

a CSS selector parser

## Example

```js
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(selector, options)` - Parses `selector`, 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             | properties                              | example       | output                                                                                   |
| ---------------- | --------------------------------------- | ------------- | ---------------------------------------------------------------------------------------- |
| `tag`            | `name`                                  | `div`         | `{ type: 'tag', name: 'div' }`                                                           |
| `universal`      | -                                       | `*`           | `{ type: 'universal' }`                                                                  |
| `pseudo`         | `name`, `data`                          | `:name(data)` | `{ type: 'pseudo', name: 'name', data: 'data' }`                                         |
| `pseudo`         | `name`, `data`                          | `:name`       | `{ type: 'pseudo', name: 'name', data: null }`                                           |
| `pseudo-element` | `name`                                  | `::name`      | `{ type: 'pseudo-element', name: 'name' }`                                               |
| `attribute`      | `name`, `action`, `value`, `ignoreCase` | `[attr]`      | `{ type: 'attribute', name: 'attr', action: 'exists', value: '', ignoreCase: false }`    |
| `attribute`      | `name`, `action`, `value`, `ignoreCase` | `[attr=val]`  | `{ type: 'attribute', name: 'attr', action: 'equals', value: 'val', ignoreCase: false }` |
| `attribute`      | `name`, `action`, `value`, `ignoreCase` | `[attr^=val]` | `{ type: 'attribute', name: 'attr', action: 'start', value: 'val', ignoreCase: false }`  |
| `attribute`      | `name`, `action`, `value`, `ignoreCase` | `[attr$=val]` | `{ type: 'attribute', name: 'attr', action: 'end', value: 'val', ignoreCase: false }`    |
| `child`          | -                                       | `>`           | `{ type: 'child' }`                                                                      |
| `parent`         | -                                       | `<`           | `{ type: 'parent' }`                                                                     |
| `sibling`        | -                                       | `~`           | `{ type: 'sibling' }`                                                                    |
| `adjacent`       | -                                       | `+`           | `{ type: 'adjacent' }`                                                                   |
| `descendant`     | -                                       |               | `{ 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](https://tidelift.com/security).
Tidelift will coordinate the fix and disclosure.

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