SPFx Key/Value Pair Properties that support Read/Write
Provide a SharePoint Framework mechanism/API that allows for Site or Site Collection Read/Write of Key/Value pair properties for use in SPFx related configuration and customizations. Similar to how the property bag was used in classic.
One use case is for storing configurable properties or even user personalization configurations written and read by an SPFx solution.
This is one of many uses cases that would make this feature valuable, so in addition to your vote, please feel free to comment with additional ways in which this feature could provide additional value.
With modern SPO site architecture, it's common for solutions for managing Projects/Programs/Proposals to span [n number of site collections] all bound to a given Hub Site.
However, there's a need to maintain metadata for each "Project" bucket alongside the site itself and aggregate that metadata across site collections for reporting needs. The "no script" nature of modern team sites, makes the manipulation of the property bag itself not a realistic option.
This is a HUGE need for future solution development on the platform.
A Graph API call we can use in Flow for this would be really useful. There's no good way to work with the site objects today.
Tom Daly commented
i'd like to be able to create an application customizer and be able to configure it per activation / site collection. Key/Value pairs could help.
Leo Siddle commented
The classic property bag APIs also exist for folders - and a common use-case is to store list/library related config values in the root folder for the list or library.
If there was going to be a new equivalent API to the classic property bag APIs, it would be great if this was also included.
Alex Terentiev commented
More Use Cases: storing custom provisioning properties like IsConfigured, IsFinalized, etc.
A bit more background: we need that functionality for NoScript sites where editing of site's Property Bag is disabled