> For the complete documentation index, see [llms.txt](https://docs.wepin.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wepin.io/en/widget-integration/web-javascript-sdk/login-library/installation.md).

# Installation

## Installing with a Package Manager

It can be installed as an npm package.

{% tabs %}
{% tab title="npm" %}

```bash
npm install @wepin/login-js
```

{% endtab %}

{% tab title="yarn" %}

```bash
yarn add @wepin/login-js
```

{% endtab %}
{% endtabs %}

Once the installation is complete, initialize the WepinLogin instance using the app ID and app key assigned after registering the app. This will enable the use of WepinLogin.

<pre class="language-javascript"><code class="lang-javascript"><strong>// 1. Import the package
</strong>import { WepinLogin } from '@wepin/login-js'
<strong>
</strong>// 2. Initialization
const wepinLogin = new WepinLogin({
    appId: 'your-wepin-app-id',
    appKey: 'your-wepin-api-key',
})
</code></pre>

{% hint style="danger" %}
This package is designed to work only in **Client Side Rendering (CSR)** environments. If you are using this package in a Server Side Rendering (SSR) environment, you need to configure it so that the package is loaded only on the client side.

Refer to the following code for implementation:

```javascript
const initWepinLogin = async () => {
    const { WepinLogin} = await import('@wepin/login-js');
    const wepinLogin = new WepinLogin({
        appKey: '',
        appId: '',
    });
    await wepinLogin .init({
        defaultLanguage: 'ko',
    });
}
```

{% endhint %}


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