Smart Forms in Next.js🧠Loading Button + Detect Updated Fields (React Hook Form Guide)

In this episode of our Next.js + MySQL Job Portal Application, we will make the employer profile form smarter and more user-friendly.

You will learn two powerful features of React Hook Form:
✅ isSubmitting – Show a loading animation and dynamic text on the submit button
✅ isDirty – Detect exactly when the user changes any field, perfect for pre-filled forms

We are also applying this on our Employer Profile Page, where all past data is pre-filled when the employer revisits the form — making updates faster, easier, and more accurate.
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📂 Source Code
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⌛TIMELINE⏳
0:00 – Adding Loading Animation & Understanding isDirty
0:12 – What We’re Building in This Episode (Quick Overview)
0:42 – How Do We Know When a User Changes Form Values?
1:35 – Implementing isDirty in React Hook Form
2:40 – Detecting Value Changes: isDirty in Real Action
4:20 – Adding Loading Animation & Dynamic Submit Button Text (isSubmitting)
6:00 – Comment Your Thoughts & Best Suggestions