PL-400 Exam Prep: Creating a Basic JavaScript Form Function for a Model Driven Power App Form

[@LisaCrosbie]

This is a really great video Joe, great pace, clear explanation, very easy to follow. Thank you!

[@CRMChap]

Thanks Lisa! Hope you're well.

[@ranatahirtahir9980]

Nice Sir Please Need video on Pl 900

[@munkybutler1]

Hi Joe, loving the PL-400 videos. How much actual Java Script does one need to know for the PL-400 exam?

[@CRMChap]

I would say you need to have foundational understanding of how the language works, but for PL-400, the focus is more on understanding what is possible via JavaScript and how to work with the various methods exposed out by the platform.

[@harrydoyle8158]

Thanks for the video, could you please go into more detail on how to add JavaScript to a specific field on the form to get it to update live? E.g. having a number/currency field sum up columns on a subgrid as they are added, similarly to a rollup but live

[@CRMChap]

Hi Harry, based on your example, the broad steps I would follow to implement this would be as follows: - Create a JavaScript function that returns all rows from the grid (docs.microsoft.com/en-us/powerapps/developer/model-driven-apps/clientapi/reference/grids/grid/getrows?WT.mc_id=BA-MVP-5003861), iterates through the result sets and then updates the field on the parent row (docs.microsoft.com/en-us/powerapps/developer/model-driven-apps/clientapi/reference/attributes/setvalue?WT.mc_id=BA-MVP-5003861) - Attach the JavaScript to the parent form and trigger the function to run as part of the subgrids OnSave event (docs.microsoft.com/en-us/powerapps/developer/model-driven-apps/clientapi/reference/events/grid-onsave?WT.mc_id=BA-MVP-5003861) Hope this helps!