Angular 8 Indepth Developer. Who has worked on parsing angular compile time parsers.

Note: Who doesn't have in-depth and strong knowledge on angular kindly don't waste time. Have to capture the data on all fields on page load and while submitting. Say if we have a form or any page have to capture the user's data what's saved earlier and what we have modified. It should be captured on all the pages expecting to be more generic. I would expect for a single component to be completed and showcased. Output should be oldvalue: Value newValue: ModifiedValue Field: Name We have already written half if possible you can fix. Or write from scratch. Expecting more generic need not to be changed existing component.