How do you handle a basic form submission in React?
Tests declarative form handling via controlled state. Nail it with onSubmit on the form, preventDefault to stop native reload, and state as the single source of truth. Red flag: reading values through refs or querySelector.
Tests whether you understand React's declarative model for user input and state-driven UI updates. A strong answer outlines a controlled form: attach onSubmit to the form element, call event.preventDefault to cancel the native browser POST and avoid a page reload, store input values in useState via onChange handlers, and read that state on submission. Red flag: reaching into the DOM with refs or querySelector to extract values, or treating React events like native DOM events without understanding SyntheticEvent pooling behavior.
Read the original → react.dev
- #react
- #forms
- #controlled-components
- #events
- #state
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