Warning Banner for SharePoint Online

[Thanuja Seneviratne]

Hi

we would like to have a custom "floating" banner in the sites where it conditionally display a warning message with metadata, when a set of custom metadata changes in the farm. In 2010 it has been implemented as in the attachment.

 Is there OOTB way to do this in Online instead a development effort? If not How we can implement same in SharePoint Online as a warning banner applicable for all the sites in the tenant?

[#2]

You can implement this in SPO by means of a SharePoint Framework (SPFx) Extension

[#3]

Juan Carlos González Martín - Do you have any sample code or article to re-direct me for reference ? I meant for the scenario/requirement I seek (not in general SPFx extension articles)

[#4]

I’ve used this one and it works well. You might be able to tweak it to your needs. https://github.com/SharePoint/sp-dev-fx-extensions/tree/master/samples/jquery-application-toastr

[#5]

Thanks Chris Webb. This is a helpful link.