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1.     Creating a File Type Field

Power Apps component framework empowers the developers to create code components for model-driven apps and canvas apps. With PCF, you can replace a field with some extra features like a rich text editor, a dial, a slider, etc. You can also replace a simple list with an interactive chart or Map.

Ques: How to implement filter(Search) in HTML using javascript? 

Recently in my current project there was a requirement of client to add Percentage Loader while the components of site is loading.

With the advent of MVC it is imperative for all programmers to understand the different ways this framework provides to share data from Controller to View. Each solution has its pros and cons. But my advice to you is stick to the method which is most comfortable to you and accepted by your team lead.