Core React#69 · Questions adapted from sudheerj/reactjs-interview-questions (MIT)

How can we find the version of React at runtime in the browser?

You can use React.version to get the version.

const REACT_VERSION = React.version;

ReactDOM.render(
  <div>{`React version: ${REACT_VERSION}`}</div>,
  document.getElementById("app")
);

Code Lab

Every sample from this answer, open in the IDE. Edit it, run it, break it.

Drill it instead → Twelve graded reps on the three traps interviewers follow up on: state as a snapshot, effect cleanup, and keys as identity.

The IDE mounts the first sample that compiles and gives you a live preview next to it.

How well did you remember this?

Core React#69 · Questions adapted from sudheerj/reactjs-interview-questions (MIT)

You can use React.version to get the version.

const REACT_VERSION = React.version;

ReactDOM.render(
  <div>{`React version: ${REACT_VERSION}`}</div>,
  document.getElementById("app")
);

Every sample from this answer, open in the IDE. Edit it, run it, break it.

Drill it instead → Twelve graded reps on the three traps interviewers follow up on: state as a snapshot, effect cleanup, and keys as identity.

The IDE mounts the first sample that compiles and gives you a live preview next to it.

How well did you remember this?