WarnOnUpdate() — react Function Reference

Architecture documentation for the WarnOnUpdate() function in index.js from the react codebase.

Function javascript BabelCompiler Validation

Entity Profile

BabelCompiler→ Validation→ WarnOnUpdate() — react Function Reference

Dependency Diagram

graph TD
  fcf28054_bbd5_0897_9a21_366fc68606cf["WarnOnUpdate()"]
  a0507bb6_7cf5_071e_db51_f9f50de2969a["index.js"]
  fcf28054_bbd5_0897_9a21_366fc68606cf -->|defined in| a0507bb6_7cf5_071e_db51_f9f50de2969a
  style fcf28054_bbd5_0897_9a21_366fc68606cf fill:#6366f1,stroke:#818cf8,color:#fff

Relationship Graph

Source Code

packages/react-devtools-shell/src/app/InlineWarnings/index.js lines 21–31

function WarnOnUpdate({children = null}) {
  const didMountRef = useRef(false);
  useEffect(() => {
    if (didMountRef.current) {
      console.warn('This warning fires on every update');
    } else {
      didMountRef.current = true;
    }
  });
  return children;
}