`react-doctor/r3f-no-state-in-pointer-move`

React state update inside an R3F pointer-move handler

Category: Performance
Severity: warn
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: react, r3f
Tags: r3f, webgl
Default: Enabled

Validate the diagnostic

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

Confirm the reported code matches react-doctor/r3f-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 "@react-three/fiber";
const Draggable = () => {
  const [position, setPosition] = useState(() => new Vector3());
  return <mesh
    position={position}
    onPointerMove={(event) => setPosition(event.point.clone())}
  />;
};

Corrected pattern

import { useRef, useState } from "react";
import "@react-three/fiber";
const Draggable = () => {
  const [position, setPosition] = useState(() => new Vector3());
  const mesh = useRef(null);
  return <mesh
    ref={mesh}
    position={position}
    onPointerMove={(event) => mesh.current.position.copy(event.point)}
    onPointerUp={(event) => setPosition(event.point.clone())}
  />;
};

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/r3f-no-state-in-pointer-move diagnostic in the current repository. Required change: - Keep pointer-move previews in Three.js refs or transient state and publish one semantic React update when the interaction commits.

Reference transformation:Before:

import { useState } from "react";
import "@react-three/fiber";
const Draggable = () => {
  const [position, setPosition] = useState(() => new Vector3());
  return <mesh
    position={position}
    onPointerMove={(event) => setPosition(event.point.clone())}
  />;
};

After:

import { useRef, useState } from "react";
import "@react-three/fiber";
const Draggable = () => {
  const [position, setPosition] = useState(() => new Vector3());
  const mesh = useRef(null);
  return <mesh
    ref={mesh}
    position={position}
    onPointerMove={(event) => mesh.current.position.copy(event.point)}
    onPointerUp={(event) => setPosition(event.point.clone())}
  />;
};

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, r3f. 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/r3f-no-state-in-use-frame: React state update inside useFrame
react-doctor/r3f-no-sync-readback-in-use-frame: Synchronous readback inside useFrame
react-doctor/r3f-no-unstable-args: Unstable R3F constructor args
react-doctor/r3f-prefer-use-loader: Imperative Three.js loader in a React effect
react-doctor/r3f-require-owned-texture-cleanup: Locally owned Three.js texture is not disposed

react-doctor/r3f-no-state-in-pointer-move