> ## Documentation Index
> Fetch the complete documentation index at: https://docs.polygon.technology/llms.txt
> Use this file to discover all available pages before exploring further.

# Plugin

> Using plugin you can inject your code into matic.js. It can be used to write common set of generic codes which can be provided to anyone using a package.

Using plugin you can inject your code into `matic.js`. It can be used to write common set of generic codes which can be provided to anyone using a package.

<Note>
  Plugin makes the `matic.js` light weight as it implements only important logical part.
</Note>

In fact, the web3 library is supported using plugin which allows us to use our favorite library.

### Plugin development

Plugin is a class which implements `IPlugin`.

```js theme={null}
import { IPlugin } from "@maticnetwork/maticjs";

export class MyPlugin implements IPlugin {

    // variable matic is - default export of matic.js
    setup(matic) {

        // get web3client
        const web3Client = matic.Web3Client ;
    }
}
```

As you can see - you just need to implement a `setup` method which will be called with default export of `matic.js`.

### Use plugin

`matic.js` expose `use` method for using a plugin.

```js theme={null}
import { use } from '@maticnetwork/maticjs'

use(MyPlugin)
```

You can use multiple plugins and they will be called in the same order as they are declared.

**Some plugin repos are -**

* [Matic web3.js](https://github.com/maticnetwork/maticjs-web3)
* [Matic ethers](https://github.com/maticnetwork/maticjs-ethers)
* [FxPortal.js](https://github.com/0xPolygon/fx-portal.js)