Bootstrap in React — React Technical Interview Questions & Answers

Bootstrap in React

Bootstrap in React

  • Bootstrap in React: import bootstrap CSS once, use class names (container, btn btn-primary), or use react-bootstrap components. Still className. Don’t run Bootstrap’s jQuery JS next to React — two DOM owners.
  • Bootstrap in React — on screen: Bootstrap-styled Join. Import bootstrap CSS once in main.

Technical Interview Tip: CSS classes. No jQuery plugins.

Code Examples for Bootstrap in React

Example

// Bootstrap classes
export default function Hero() {
  return (
    <div className="container">
      <button className="btn btn-primary">Join</button>
    </div>
  );
}

Bootstrap in React — on screen: Bootstrap-styled Join. Import bootstrap CSS once in main.

How to Explain Bootstrap in React to an Interviewer

Explain Bootstrap as if you are teaching a junior — definition, then one tiny UI.

Import CSS once. className or react-bootstrap.

What does the example show on screen (or print), and what does that prove?

Bootstrap in React — on screen: Bootstrap-styled Join

What mistake do freshers make with Bootstrap?

className or react-bootstrap.