# JavaScript API

Start by installing PurgeCSS as a dev dependency.

```
npm i -D purgecss
```

You can now use PurgeCSS inside a JavaScript file.

In the following examples, the options passed to PurgeCSS are the same as the ones [here](/configuration.md). The result `purgecssResult` is an array of an object containing the name of the files with the purged CSS.

## ES6 with import

```javascript
import Purgecss from 'purgecss'
const purgeCss = new Purgecss({
  content: ['**/*.html'],
  css: ['**/*.css']
})
const purgecssResult = purgecss.purge()
```

The format of purgecssResult is

```javascript
[
    {
        file: 'main.css',
        css: '/* purged css for main.css */'
    },
    {
        file: 'animate.css',
        css: '/* purged css for animate.css */'
    }
]
```

## ES5 with require

```javascript
var Purgecss = require('purgecss')
var purgecss = new Purgecss({
  content: ['**/*.html'],
  css: ['**/*.css']
})
var purgecssResult = purgecss.purge()
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://v1.purgecss.com/javascript-api.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.