> For the complete documentation index, see [llms.txt](https://docs.ngsurvey.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ngsurvey.com/installation-setup/installation/content-security-policy-csp.md).

# Content Security Policy (CSP)

If you need to enforce content security policy (CSP) on the users browsers you can enable CSP on ngSurvey using following environment variable.

**`NGSurvey:CPSPolicy`**must be set to "Self" will enforce the content security policy (CSP) on the browser. 

Note that your CSP must allow unsafe inline CSS styles :

```
style-src 'self' 'unsafe-inline';
```

{% hint style="warning" %}
Widget based answer items and any custom javascript related features like form codes, custom answer validations will be disabled if set to Self. 
{% endhint %}


---

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