Validation of SPO List Form fields Instantly when a Field loses focus

Occasional Contributor

Dear Community,


I would like to validate SharePoint Online List Form fields instantly when a Field loses focus instead of validating at very end by clicking on SAVE button in Form and as discussed in the Website URL below.


VALIDATIONS NEEDED: A) First Letter CAPS, B) Removing Leading and Trailing spaces in Text Field.


Any MS documentation or similar solution would be great to implement same. Kindly advise


Thank You,


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