`react-doctor/three-no-state-in-pointer-move`

React state update inside Three.js pointer-move handler

Category: Performance
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-no-state-in-pointer-move. 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

import { useState } from "react";
import { Vector2 } from "three";
const cursor = new Vector2();
const Pointer = () => {
  const [position, setPosition] = useState([0, 0]);
  return <>
    <canvas onPointerMove={(event) => {
      cursor.set(event.clientX, event.clientY);
      setPosition([event.clientX, event.clientY]);
    }} />
    <output>{position.join(",")}</output>
  </>;
};

Corrected pattern

import { useState } from "react";
import { Vector2 } from "three";
const cursor = new Vector2();
const Pointer = () => {
  const [position, setPosition] = useState([0, 0]);
  return <>
    <canvas
      onPointerMove={(event) => {
        cursor.set(event.clientX, event.clientY);
      }}
      onPointerUp={() => setPosition(cursor.toArray())}
    />
    <output>{position.join(",")}</output>
  </>;
};

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-no-state-in-pointer-move diagnostic in the current repository. Required change: - Keep continuous pointer previews in Three.js objects or refs and publish React state when the interaction commits.

Reference transformation:Before:

import { useState } from "react";
import { Vector2 } from "three";
const cursor = new Vector2();
const Pointer = () => {
  const [position, setPosition] = useState([0, 0]);
  return <>
    <canvas onPointerMove={(event) => {
      cursor.set(event.clientX, event.clientY);
      setPosition([event.clientX, event.clientY]);
    }} />
    <output>{position.join(",")}</output>
  </>;
};

After:

import { useState } from "react";
import { Vector2 } from "three";
const cursor = new Vector2();
const Pointer = () => {
  const [position, setPosition] = useState([0, 0]);
  return <>
    <canvas
      onPointerMove={(event) => {
        cursor.set(event.clientX, event.clientY);
      }}
      onPointerUp={() => setPosition(cursor.toArray())}
    />
    <output>{position.join(",")}</output>
  </>;
};

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. - Preserve resource ownership and cleanup. Do not move work into a hotter render or frame path. - 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 Performance rules from the rules reference:

react-doctor/three-require-owned-geometry-cleanup: Locally owned Three.js geometry is not disposed
react-doctor/three-require-owned-material-cleanup: Locally owned Three.js material is not disposed
react-doctor/three-require-owned-texture-cleanup: Locally owned Three.js texture is not disposed
react-doctor/three-shader-no-inverse-of-uniform: Shader inverts a uniform matrix per invocation
react-doctor/three-shader-no-redundant-frag-depth: Shader redundantly writes fragment depth

react-doctor/three-no-state-in-pointer-move