`react-doctor/ink-no-focus-in-render`

Ink focus changed during render

Category: Bugs
Severity: error
Source: oxlint-plugin-react-doctor
Framework: global
Enabled when: Ink >= 3.0.0
Tags: ink
Default: Enabled

Validate the diagnostic

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

Confirm the reported code matches react-doctor/ink-no-focus-in-render. 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 { Text, useFocusManager } from "ink";

const App = () => {
  const focusManager = useFocusManager();
  focusManager.focus("name");
  return <Text />;
};

Corrected pattern

import { Text, useFocusManager } from "ink";
import { useEffect } from "react";

const App = () => {
  const focusManager = useFocusManager();
  useEffect(() => {
    focusManager.focus("name");
  }, [focusManager]);
  return <Text />;
};

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/ink-no-focus-in-render diagnostic in the current repository. Required change: - Move focus-manager calls to an effect or input handler.

Reference transformation:Before:

import { Text, useFocusManager } from "ink";

const App = () => {
  const focusManager = useFocusManager();
  focusManager.focus("name");
  return <Text />;
};

After:

import { Text, useFocusManager } from "ink";
import { useEffect } from "react";

const App = () => {
  const focusManager = useFocusManager();
  useEffect(() => {
    focusManager.focus("name");
  }, [focusManager]);
  return <Text />;
};

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: Ink >= 3.0.0. 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/ink-no-layout-inside-text: Layout component nested in Ink Text
react-doctor/ink-no-live-hooks-in-render-to-string: Inert input hook used during string rendering
react-doctor/ink-no-measure-element-in-render: Ink element measured during render
react-doctor/ink-no-multiple-static: Multiple unconditional Static regions in one render root
react-doctor/ink-no-raw-text: Raw text outside Ink Text

react-doctor/ink-no-focus-in-render