Forum Discussion

Copper Contributor

Dec 05, 2020

Injecting javascript into SharePoint online communication site

Hi All I need to inject some javascript into all sharepoint online site collection pages. I managed to do it in Team site by adding javascript file link in to a master page, but cannot find the way ...

developer

Beau Cameron

MVP

Dec 07, 2020

RomanRomych Depending on what you are trying to do, it's likely not supported. Modern Pages do not support the same DOM injection that we used to use in classic. To run JavaScript on your modern pages, you would indeed have to build an SPFx extension.

However, if you build an SPFx extension that is used to change out of the box components such as web parts, sections, navigation, etc... this would be unsupported, so be careful doing so.

RomanRomych

Copper Contributor

Dec 08, 2020

Beau Cameron Thanks

So we cannot really add much custom scripts into modern sharepoint?

Beau Cameron
MVP
Dec 08, 2020
RomanRomych Correct. As mentioned, you can use SPFx Application Customizers, but you shouldn't inject JavaScript to customize out of the box components. It's only supported to inject code into pre-defined placeholders on the page (top and bottom).