Interview Q&A / React

1. Why does a controlled input stop accepting typing in React?

   A controlled input shows exactly what its value prop says. If you set value without an onChange that updates state, React keeps resetting it to the old value, so the field looks frozen and also warns in the console.

   BeginnerQuick answer1 min read
2. For a simple contact form, would you use controlled or uncontrolled inputs?

   For a few fields that are only read on submit, uncontrolled inputs with FormData are enough and re-render less. Use controlled inputs when you need live validation, dependent fields, formatting as the user types or to disable the button.

   IntermediateQuick answer1 min read