# Node.js

**Node.js is an open-source, back-end (or server-side) environment for developing apps. It works across platforms and Node.js applications are written in JavaScript. Node.js provides a runtime environment that executes JavaScript code outside a web browser. In this module, we teach you how to use Node.js most effectively.**

Below an overview of the week-by-week topics - click on the title to find more details.

{% content-ref url="nodejs/week-1" %}
[week-1](https://syllabus.migracode.org/courses/introduction-3/course-content/nodejs/week-1)
{% endcontent-ref %}

{% content-ref url="nodejs/week-2" %}
[week-2](https://syllabus.migracode.org/courses/introduction-3/course-content/nodejs/week-2)
{% endcontent-ref %}

{% content-ref url="nodejs/week-3" %}
[week-3](https://syllabus.migracode.org/courses/introduction-3/course-content/nodejs/week-3)
{% endcontent-ref %}

![](https://4042228299-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-MRebciU3NcuLgsX3ijf%2F-MSXGtKUhAK1wnjgonVJ%2F-MSXHFTPlFGTiDQE_NYZ%2FP9010126migracode-bcn.jpg?alt=media\&token=29341bd7-f520-4745-be53-78a1da774730)


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# 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://syllabus.migracode.org/courses/introduction-3/course-content/nodejs.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.