`react-doctor/three-require-postprocessing-cleanup`

Undisposed Three.js postprocessing resource

Category: Bugs
Severity: warn
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: react, three
Tags: three, webgl
Default: Enabled

Validate the diagnostic

Confirm the reported code matches this rule before you edit it.

Confirm the reported code matches react-doctor/three-require-postprocessing-cleanup. Compare it with the Before example and verify the same API, framework, and execution context. Treat it as a false positive only when one of those conditions differs.

Compare the code

The corrected pattern shows a focused way to address the diagnostic.

Reported pattern

useEffect(() => {
  const composer = new EffectComposer(renderer);
  composer.addPass(new RenderPass(scene, camera));
}, [camera, renderer, scene]);

Corrected pattern

useEffect(() => {
  const composer = new EffectComposer(renderer);
  composer.addPass(new RenderPass(scene, camera));
  return () => composer.dispose();
}, [camera, renderer, scene]);

How to fix

Use the corrected pattern as a reference. Preserve behavior that the rule does not require you to change.

Copyable fix prompt

Copy this self-contained prompt into your coding agent after you confirm the diagnostic.

Fix every confirmed react-doctor/three-require-postprocessing-cleanup diagnostic in the current repository. Required change: - Dispose component-owned postprocessing composers and resource-owning passes.

Reference transformation:Before:

useEffect(() => {
  const composer = new EffectComposer(renderer);
  composer.addPass(new RenderPass(scene, camera));
}, [camera, renderer, scene]);

After:

useEffect(() => {
  const composer = new EffectComposer(renderer);
  composer.addPass(new RenderPass(scene, camera));
  return () => composer.dispose();
}, [camera, renderer, scene]);

Constraints: - Confirm the reported code matches the Before pattern. - Make the smallest change that fixes the root cause. - Preserve behavior and interfaces unrelated to this diagnostic. - Reuse existing project components, utilities, and conventions. - Do not introduce render-phase side effects, render-phase state updates, or Hooks rule violations. - Adapt identifiers and framework details instead of copying blindly. - Do not disable the rule or suppress matching code. - Confirm this rule is enabled for the project: react, three. Verification: - Run focused tests for the changed behavior. - Run React Doctor and confirm this diagnostic no longer appears. - Report the files changed and any checks you could not run.

More Bugs rules from the rules reference:

react-doctor/three-require-projection-matrix-update: Missing Three.js camera projection-matrix update
react-doctor/three-require-render-target-cleanup: Undisposed Three.js render target
react-doctor/three-require-renderer-cleanup: Undisposed Three.js renderer
react-doctor/three-shader-no-constant-out-of-bounds-index: Shader uses a constant out-of-bounds index
react-doctor/three-shader-no-derivatives-in-nonuniform-flow: Shader derivative runs in non-uniform control flow

react-doctor/three-require-postprocessing-cleanup