# #3 Overriding a file

{% embed url="<https://youtu.be/Oi45D1r1DUs>" %}
How to override a file
{% endembed %}

In this tutorial we will showcase and talk about following topics:

* [Themes and parent themes](https://docs.create-scandipwa-app.com/themes/extensions-and-themes) (link to Create ScandiPWA App documentation)
* [File overrides](https://docs.create-scandipwa-app.com/themes/parent-themes) (link to Create ScandiPWA App documentation)

As well as from this documentation:

{% content-ref url="../../developing-with-scandi/override-mechanism/extending-javascript" %}
[extending-javascript](https://docs.scandipwa.com/developing-with-scandi/override-mechanism/extending-javascript)
{% endcontent-ref %}

{% content-ref url="../../developing-with-scandi/override-mechanism/extending-styles" %}
[extending-styles](https://docs.scandipwa.com/developing-with-scandi/override-mechanism/extending-styles)
{% endcontent-ref %}

{% content-ref url="../../developing-with-scandi/override-mechanism/overriding-the-index-file" %}
[overriding-the-index-file](https://docs.scandipwa.com/developing-with-scandi/override-mechanism/overriding-the-index-file)
{% endcontent-ref %}