> For the complete documentation index, see [llms.txt](https://docs.nosto.com/ugc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.nosto.com/ugc/guides/widgets-nextgen/typescript-api-guides/loading-external-js-and-css-libraries-to-widgets.md).

# How to load external JS and external CSS

{% hint style="warning" %}
You are reading the **NextGen Documentation**

**NextGen widgets** are a new and improved way to display UGC content onsite. 

From September 23rd 2025, all new widgets created will be NextGen.

Please check your widget version on the **Widget List page** to see if it is a **Classic** or **NextGen** widget.

You can read the [Classic Widget Documentation](/ugc/guides/onsite-widgets/loading-external-js-and-css-libraries-to-widgets.md) here.
{% endhint %}

## Overview

This article will demonstrate how to load external JavaScript and CSS into your widgets using our custom code editors.

## Loading the External CSS

Loading the external CSS is very straight-forward. You just need to use the CSS `@import`.

### Example

You can write the following code in your Custom CSS code editor to load [Bootstrap](http://getbootstrap.com) and [Font Awesome](http://fontawesome.io) libraries.

```
@import url(https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.0.0-alpha/css/bootstrap.min.css);
@import url(https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.6.2/css/font-awesome.min.css);
```

[Back to Top](#top)

## Loading the External JavaScript

In order to load external Javascript files, you can utilise

```js
sdk.addLoadedComponents(["https://google.com/bananas.js"])
```

Congratulations! You have successfully loaded external JS and CSS into your widgets.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

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

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.nosto.com/ugc/guides/widgets-nextgen/typescript-api-guides/loading-external-js-and-css-libraries-to-widgets.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

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.