React Technical Interview Questions

Know a question that isn't here? Add to the bottom and create a pull request. See a question that you have an answer for? Add a link to a codesandbox demo. Thanks for helping the community!

Goals

Most technical questions are looking to assess:

Ability to call an API and parse JSON.
Ability to handle promises.
Ability to put data into state and use that to render on the page.
Basic CSS (flexbox, border styles, background, centering a div on page)
Abiltiy to handle events and gather target's value from input boxes (event.target.value)
Ability to use hooks such as useState, useEffect.
Ability to pass the right dependency array to useEffect.

Questions

Create an app to fetch data from a JSON API. Use this data to render on the page. Provide ability to paginate the results Video
Create a typeahead component.Video
Given a mock, use React to render on the page. Check Sample Mocks section
Create a TO-DO app.
Infinite scrolling app
Create a form that gathers user's data and sends it to server.
Create a tic tac toe game.
Create a slideshow type app. The data of slides could be given. It contains an image url, and the title of the slide. Left and Right navigation buttons are needed.
Create a form app that has a different state of UI when a field is selected, has value or is visited. (Uses onFocus, onBlur events)
Create a ticker that increments value every second.
Create an app that allows user to click a button 5 times, and times them out afterwards.
Create an app that uses debouncing / throttling.

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

Uh oh!