original file name: Codeium Chat - hWX7WVTcI5rkxThxH0FZXQvAJXUtMKCc.md summary: The user is trying to make the centiSecond value available in real-time to other modules in their project for timing purposes. They are using React and hooks for state management.

I provided assistance by suggesting the implementation of a context to share the centiSecond value across components/modules. I demonstrated how to create a React context, provider, and custom hook to access the value.

The user further inquired about whether to create a getCentiSecond() method in the Timer.tsx file for reading centiSecond or to access it directly through the TimerContext. I advised them to utilize the useTimer hook directly in other modules to retrieve the value, eliminating the need for a dedicated method in Timer.tsx.

Subsequently, the user encountered an error related to the useContext call within the useTimer hook, indicating a possible null context issue. I provided troubleshooting steps, including verifying the correct setup of the TimerProvider and ensuring the presence of the context throughout the component hierarchy.

Lastly, the user shared a lengthy module where they attempted to call the useTimer hook within a class, which led to errors. They were also showing their implementation of various functionalities related to typing tests and timing within the module.

Throughout the interaction, I provided guidance and solutions related to state management using context in React, handling context errors, and context usage scenarios within different components/modules. date: 2024-05-09T21:42

Codeium Chat Conversation

Note: This is purely the output of the chat conversation and does not contain any raw data, codebase snippets, etc. used to generate the output.

User at 9:42 pm, May 9, 2024

I need to make centiSecond available in real-time to other modules for timing. How can I do that?

Codeium at 9:42 pm, May 9, 2024

To make centiSecond available in real-time to other modules, you can utilize a context or state management solution. Given the code from {assets/ts/Timer.tsx}, you're using React hooks, so one approach is to use React Context.

Here's a simplified example of how you can create a context to share centiSecond:

import React, { createContext, useContext, useState, useEffect } from 'react';

// Create a context object
const TimerContext = createContext({
  centiSecond: 0,
  setCentiSecond: (value: number) => {},
});

// Context Provider component
const TimerProvider: React.FC = ({ children }) => {
  const [centiSecond, setCentiSecond] = useState(0);
  // The rest of your timer logic...

  return (
    <TimerContext.Provider value={{ centiSecond, setCentiSecond }}>
      {children}
    </TimerContext.Provider>
  );
};

// Custom hook to use the context
const useTimer = () => {
  const context = useContext(TimerContext);
  if (context === undefined) {
    throw new Error('useTimer must be used within a TimerProvider');
  }
  return context;
};

export { TimerProvider, useTimer };

In your Timer component, you would then use the useTimer hook to access centiSecond and setCentiSecond. Make sure to wrap your component tree with TimerProvider at a high level in your app so that the context is available to all components that need it.

For components that need to access centiSecond:

import { useTimer } from './path-to-timer-context';

const SomeComponent: React.FC = () => {
  const { centiSecond } = useTimer();

  // Use centiSecond as needed...
  return <div>CentiSecond: {centiSecond}</div>;
};

Remember to replace './path-to-timer-context' with the actual path to your context file.

This is just one way to share state across different components/modules in real-time. Depending on your application's complexity and state management needs, you might consider other solutions such as Redux, MobX, or Recoil.

User at 10:30 pm, May 9, 2024

Using that arrangement, would I create a getCentiSecond() in the Timer.tsx to allow other modules to read the centiSecond, or would I just have them access the TimerContext too?

Codeium at 10:31 pm, May 9, 2024

Other modules should use the useTimer hook from {TimerContext.tsx} directly to access centiSecond. There's no need to create a getCentiSecond() method in Timer.tsx since useTimer already provides a way to access centiSecond.

Here's how other modules can use useTimer:

import { useTimer } from './TimerContext'; // use the correct relative path

const OtherModuleComponent: React.FC = () => {
  const { centiSecond } = useTimer();

  console.log('Current centiSecond:', centiSecond);

  // Rest of your component logic
  return <div>...</div>;
};

This way, any component that needs to read the centiSecond value can do so in a React idiomatic way, while maintaining the same source of truth and ensuring that the state is updated in real-time across all components that use it.

User at 10:54 pm, May 9, 2024

After stopping the app and restarting it I'm now getting an error:

  at useContext2 (localhost꞉1313/ts/terminal/main.js:7713:31)
  at useTimer (localhost꞉1313/ts/terminal/main.js:30469:49)
  at NextCharsDisplay (localhost꞉1313/ts/terminal/main.js:31821:31)
  at XtermAdapter (localhost꞉1313/ts/terminal/main.js:32077:31)
  at <anonymous> (localhost꞉1313/ts/terminal/main.js:32293:28)

Codeium at 10:54 pm, May 9, 2024

The error suggests that the useTimer hook is being called in a context where TimerContext is null. This can happen if the component using useTimer hook is not properly wrapped within a TimerProvider.

Here's how to ensure components using useTimer are wrapped with TimerProvider:

import { TimerProvider } from './TimerContext'; // use the correct relative path

const App: React.FC = () => {
  return (
    <TimerProvider>
      {/* Other components that use useTimer */}
    </TimerProvider>
  );
};

Make sure that NextCharsDisplay and any other component that calls useTimer are descendants of TimerProvider in the component tree. If the TimerProvider is set up correctly, then the context should not be null, and the useContext call within useTimer should work without errors.

If everything seems correctly set up and you're still facing issues, it might be helpful to check the following:

Ensure that TimerProvider is used and is the parent component in the component hierarchy.
Check if there are any conditional renders that might unmount TimerProvider.
Make sure there are no duplicate React instances in your project as that can cause context to not work as expected.
Ensure that TimerContext is correctly imported where the TimerProvider is used.

If you're using server-side rendering or static generation, ensure that the context is properly hydrated on the client side.

User at 8:38 am, May 10, 2024

This is the module that I am trying to call useTimer from:

import { Chord, spaceDisplayChar, ChordRow, createCharTime, CharTime } from "./types/Types.js";
import { createElement } from "./utils/dom.js";
import { TerminalCssClasses } from "./terminal/TerminalTypes.js";
import { createHTMLElementFromHTML } from "./utils/dom.js";

import React, { createRef } from 'react';
import { createRoot, Root } from 'react-dom/client'; // Import createRoot
import Timer from './Timer.js'; // Import the React component
import { allChords } from "./allChords.js";
import { useTimer } from './TimerContext'; // use the correct relative path


export class NextCharsDisplay {
  private _nextChars: HTMLElement;
  private _phrase: HTMLInputElement;

  private _wholePhraseChords: HTMLElement;
  private _chordImageHolder: HTMLElement;
  private _svgCharacter: HTMLElement;
  private _testMode: HTMLInputElement;
  private _testArea: HTMLTextAreaElement;
  private _nextChar: string = '';
  // private _timer: Timer;
  private _timerRoot: HTMLElement | null = null;
  private _timerRef: React.RefObject<any>;
  private timerComponentRoot: Root | null = null;
  private _centiSecond: number = 0;
  private _chordified: HTMLElement;
  private _allChordsList: HTMLElement;
  private _errorCount: HTMLElement;
  private _voiceMode: HTMLInputElement;
  private voiceSynth: SpeechSynthesis;
  private _lambdaUrl: string;
  private _prevCharTime: number = 0;
  private _charTimeArray: CharTime[] = [];
  private _charTimes: HTMLElement;
  private _wpm: HTMLSpanElement;
  public isTestMode: boolean;

  constructor() {
    const handleInputEvent = this.testInput.bind(this);
    this._phrase = createElement('div', TerminalCssClasses.Phrase);
    this._lambdaUrl = 'https://l7c5uk7cutnfql5j4iunvx4fuq0yjfbs.lambda-url.us-east-1.on.aws/';
    this.voiceSynth = window.speechSynthesis as SpeechSynthesis;
    this._nextChars = document.getElementById(TerminalCssClasses.NextChars) as HTMLElement;
    this._nextChars.hidden = true;
    this._wpm = createElement('div', TerminalCssClasses.WPM) as HTMLSpanElement;
    this._charTimes = createElement('div', TerminalCssClasses.CharTimes);
    this._wholePhraseChords = createElement('div', TerminalCssClasses.WholePhraseChords);
    this._allChordsList = createElement('div', TerminalCssClasses.allChordsList);
    this._chordImageHolder = document.querySelector(`#${TerminalCssClasses.ChordImageHolder}`) as HTMLElement;
    this._svgCharacter = createElement('img', TerminalCssClasses.SvgCharacter);
    this._testMode = createElement('input', TerminalCssClasses.TestMode) as HTMLInputElement;
    this.attachTestMode();
    this._chordified = createElement('div', TerminalCssClasses.chordified);
    this._errorCount = document.getElementById(TerminalCssClasses.errorCount) as HTMLSpanElement;
    this._voiceMode = createElement('input', TerminalCssClasses.voiceMode) as HTMLInputElement;
    this._testArea = (document.getElementById(TerminalCssClasses.TestArea) as HTMLTextAreaElement);
    this.isTestMode = localStorage.getItem('testMode') == 'true';
    this._timerRef = createRef();
    this.mountTimer();
    // this._timer = new Timer();
    this.attachEventListeners();
    const { centiSecond } = useTimer();
    this._centiSecond = centiSecond;

  }
  mountTimer() {
    this._timerRoot = document.getElementById('timer-root');
    console.log('timerRoot', this._timerRoot);
    if (this._timerRoot) {
      this.timerComponentRoot = createRoot(this._timerRoot); // Create a root
      this.timerComponentRoot.render(<Timer ref={this._timerRef} />); // Render the Timer component with the ref
    }
  }

  stopTimer() {
    if (this._timerRef.current){
      this._timerRef.current.stop();
    }
  }



  findOrConstructPhrase(): HTMLInputElement {
    let result = document.getElementById(TerminalCssClasses.Phrase) as HTMLInputElement;
    if (!result) {
      console.log(`Phrase not found at document.getElementById('${TerminalCssClasses.Phrase}')`, document.getElementById(TerminalCssClasses.Phrase));
      result = createElement('input', TerminalCssClasses.Phrase)
    }
    return result;
  }

  attachEventListeners() {
    if (this._testArea) {
      this._testArea.addEventListener('keyup', (e: Event) => {
        if (this._voiceMode && this._voiceMode.checked) {
          this.sayText(e as KeyboardEvent);
        }
      })
      this._testArea.addEventListener('input', (e: Event) => {
        this.testInput(this._testArea.value);
      });
    }
  }
  set wpm(wpm: HTMLSpanElement) {
    this._wpm = wpm;
  }
  get phrase(): HTMLInputElement {
    return this._phrase;
  }
  public get nextChars(): HTMLElement {
    return this._nextChars;
  }

  get chordified(): HTMLElement {
    return this._chordified;
  }

  set testMode(testMode: HTMLInputElement) {
    this._testMode = testMode;
    this._testMode.checked = localStorage.getItem('testMode') == 'true';
    this.isTestMode = this._testMode.checked;
    this.attachTestMode();
  }

  private attachTestMode() {
    this._testMode.addEventListener('change', e => {
      localStorage.setItem('testMode', this.isTestMode.valueOf().toString());
      this.getWpm();
    })
  }

  set testArea(testArea: HTMLTextAreaElement) {
    this._testArea = testArea;
    this._testArea.addEventListener('input', (e: Event) => {
      this.testInput(this._testArea.value);
    });
  }

  get testArea(): HTMLTextAreaElement {
    return this._testArea;
  }

  reset(): void {
    this._phrase.value = '';
    this.setNext('');
    this._nextChars.hidden = true;
  }

  set phrase(phrase: HTMLInputElement) {
    this._phrase = phrase;
  }
  setPhraseString(newPhrase: string): void {
    this._phrase.innerText = newPhrase;
    this.setNext(''); // Reset the display with the new phrase from the beginning
    this._nextChars.hidden = false;
  }

  updateDisplay(testPhrase: string): void {
    const nextIndex = this.getFirstNonMatchingChar(testPhrase);
    this.setNext(testPhrase);
    const nextChars = this._phrase.value.substring(nextIndex, nextIndex + 40);
    this._nextChars.innerHTML = this.formatNextChars(nextChars);
  }
  getNextCharacters(testPhrase: string, fullPhrase: string): string {
    const nextIndex = this.getFirstNonMatchingChar(testPhrase);
    const nextChars = fullPhrase.substring(nextIndex, nextIndex + 40);
    return nextChars;
  }

  /**
   * Calculates the words per minute (WPM) based on the text typed in the test area.
   *
   * @return {string} The calculated words per minute as a string with two decimal places.
   */
  getWpm(): string {
    if (!this._testArea) return "0";
    if (this._testArea.value.length < 2) {
      return "0";
    }

    const words = this._testArea.value.length / 5;
    const result = (words / (this._centiSecond / 100 / 60) + 0.000001).toFixed(2);
    return result;
  }

  private formatNextChars(chars: string): string {
    let result = chars;
    // Format the characters as needed for display, e.g., replace spaces, add span for the next character, etc.
    // Return the formatted string to be set as innerHTML of the nextCharsElement
    return result;
  }

  createChordHTML(foundChord: Chord): HTMLElement {
    return createHTMLElementFromHTML(
      `<div class="col-sm-2 row generated" id="chord2">
        <span id="char${foundChord.index}">${foundChord.key}</span>
        <img loading="lazy" alt="2" src="/images/svgs/${foundChord.chordCode}.svg" width="100" class="hand">
      </div>`
    )
  }

  findChordHTML(chordChar: string): HTMLElement | null {
    let inChord: HTMLElement | null = null;
    const foundChords
      = Array.from(allChords)
        .filter(x => { return x.key == chordChar; });
    // Load the clone in Chord order into the wholePhraseChords div.
    if (foundChords.length > 0) {
      // const inChord = foundChords[0].cloneNode(true) as HTMLDivElement;
      const foundChord = foundChords[0];
      inChord = this.createChordHTML(foundChord);
      inChord.setAttribute("name", foundChord.key);
      inChord.hidden = this.isTestMode;
    }
    else {
      console.log("Missing chord:", chordChar);
    }
    return inChord;
  }
  public async chordify(): Promise<Array<ChordRow>> {
    if (this._chordified) this._chordified.innerHTML = '';
    if (!this._phrase || !this._phrase.value || this._phrase.value.trim().length == 0) {
      return [];
    }
    const phraseEncoded = btoa(this._phrase.value);
    const response = await fetch(this._lambdaUrl, {
      method: 'POST',
      headers: {

      },
      body: JSON.stringify({
        phrase: phraseEncoded
      })
    });
    const chordList = await response.json();
    if (chordList.error) {
      console.log("chordList.error:", chordList.error);
      return [];
    }
    const chordRows = chordList.json as Array<ChordRow>;
    // Add each row to the chordified element as a separate div with the first character of the row as the name.
    if (this._wholePhraseChords) this._wholePhraseChords.innerHTML = '';
    chordRows.forEach((row: ChordRow, i: number) => {
      const rowDiv = document.createElement('div') as HTMLDivElement;
      const chordCode = row.chord.toString(16);
      let inChord = this.findChordHTML(row.char);
      if (this._wholePhraseChords && inChord) this._wholePhraseChords.appendChild(inChord);
      document.getElementById(`chord${chordCode}`)?.querySelector(`img`)?.setAttribute("loading", "eager");
      // document.querySelector(`#${chordCode}`).hidden = false;
      rowDiv.id = i.toString();
      rowDiv.setAttribute("name", row.char);
      const charSpan = document.createElement('span');
      charSpan.innerHTML = row.char;
      rowDiv.appendChild(charSpan);
      rowDiv.appendChild(document.createTextNode(row.strokes));
      if (this._chordified) this._chordified.appendChild(rowDiv);
    });
    this.setNext('');
    // this._timer.setSvg('start');
    if (this._testArea) this._testArea.focus();
    this._phrase.disabled = true;
    this.setPhraseString(this._phrase.value);
    return chordRows;
  }
  cancelTimer = () => {
    console.log("cancelTimer");
    if(this._timerRef.current) {
      this._timerRef.current.stop();
    }
    this._nextChars.innerText = this._phrase.value;
    this._chordImageHolder.textContent = '';
    if (this._testArea) {
      this._testArea.style.border = "2px solid lightgray";
      this._testArea.disabled = false;
      this._testArea.value = '';
      this._testArea.focus();
    }

  }
  resetChordify = () => {
    if (this._phrase) {
      this._phrase.value = '';
      this._phrase.disabled = false;
    }
    if (this._wholePhraseChords) this._wholePhraseChords.innerHTML = '';
    if (this._allChordsList) this._allChordsList.hidden = true;
    if (this._testArea) {
      this._testArea.value = '';
      this._testArea.disabled = false;
    }
  };
  private setNext = (testPhrase: string): HTMLElement | null => {
    const nextIndex = this.getFirstNonMatchingChar(testPhrase);
    if (nextIndex < 0) {
      return null;
    }
    // Remove the outstanding class from the previous chord.
    Array
      .from(this._wholePhraseChords?.children ?? [])
      .forEach((chord, i) => {
        chord.classList.remove("next");
      });

    if (nextIndex > this._phrase.value.length - 1) {
      return null;
    }

    let nextCharacter = `<span class="nextCharacter">${this._phrase.value.substring(nextIndex, nextIndex + 1).replace(' ', '&nbsp;')}</span>`;

    // this.updateDisplay(testPhrase);
    const nextChars = this._phrase.value.substring(nextIndex, nextIndex + 40);
    this._nextChars.innerHTML = this.formatNextChars(nextChars);

    const next = this._wholePhraseChords?.children[nextIndex] as HTMLElement;
    let inChord = this.findChordHTML(nextChars[0]);

    if (inChord) {
      inChord.classList.add("next");
      this._chordImageHolder.replaceChildren(inChord);
    }

    if (this._svgCharacter && next) {
      const nameAttribute = next.getAttribute("name");
      if (nameAttribute) {
        this._svgCharacter.innerHTML = nameAttribute
          .replace("Space", spaceDisplayChar)
          .replace("tab", "↹");
      }
    }
    if (this._svgCharacter && !this.isTestMode) {
      this._svgCharacter.hidden = false;
    }
    this._wpm.innerText = this.getWpm();
    return next;
  };

  cancel = () => {
    if (this._testArea) {
      this._testArea.value = '';
      this._testArea.focus();
      this._testArea.style.border = "";
    }
    this._charTimeArray = [];
    this._prevCharTime = 0;
    if (this.wpm) this.wpm.innerText = '0';
    if (this._charTimes) this._charTimes.innerHTML = '';
    // clear error class from all chords
    Array
      .from(this._wholePhraseChords.children)
      .forEach(
        (chord: HTMLElement) => {
          chord.classList.remove("error");
        }
      );
    this.setNext('');
  }

  testInput = (inputString: string) => {
    const currentChar = inputString.slice(-1); // Get the last character of the inputString
    const expectedChar = this._nextChar; // Expected character to be typed next

    if (currentChar === expectedChar) {
      const charTime = createCharTime(
        currentChar,
        Number(((this._centiSecond - this._prevCharTime) / 100).toFixed(2)),
        this._centiSecond / 100
      );
      this._charTimeArray.push(charTime);
    }

    const next = this.setNext(inputString);
    if (next) {
      next.classList.remove("error");
    }
    this._prevCharTime = this._centiSecond;

    // TODO: de-overlap this and comparePhrase
    if (inputString.length === 0) {
      // stop timer
      if (this._testArea) this._testArea.style.border = "";
      const chordImageHolderChild = this._chordImageHolder?.firstChild as HTMLImageElement;
      if (chordImageHolderChild) chordImageHolderChild.hidden = true;
      this.cancelTimer();
      return;
    }

    if (inputString
      == this._phrase.value
        .trim().substring(0, inputString.length)
    ) {
      if (this._testArea) this._testArea.style.border = "4px solid #FFF3";
      if (this._svgCharacter) this._svgCharacter.hidden = true;
      this._nextChars.textContent = this.getNextCharacters(inputString, this._phrase.value);
    }
    else {
      // MISMATCHED
      // Alert mismatched text with red border.
      if (this._testArea) this._testArea.style.border = "4px solid red";
      if (this._svgCharacter) {
        // this._svgCharacter
        this._svgCharacter.hidden = false;
        // this._chordImageHolder.appendChild(this._svgCharacter);
        this._chordImageHolder.hidden = false;
      }
      let firstChild = this._chordImageHolder.children[0] as HTMLElement;
      if (firstChild) firstChild.hidden = false;
      // const chordImageHolderChild = this._chordImageHolder?.firstChild as HTMLImageElement;
      // if (chordImageHolderChild) chordImageHolderChild.hidden = false;
      next?.classList.add("error");
      if (this._errorCount)
        this._errorCount.innerText = (parseInt(this._errorCount.innerText) + 1).toString(10);
    }

    if (inputString.trim() == this._phrase.value.trim()) {
      // SUCCESS 
      // SHOW completion indication
      // this._timer.setSvg('stop');
      if (this._testArea) {
        this._testArea.classList.add('disabled');
        this._testArea.disabled = true;
        this._testArea.style.border = "4px solid #0F0A";
      }
      let charTimeList = "";
      this._charTimeArray.forEach((x: CharTime) => {
        charTimeList += `<li>${x.char.replace(' ', spaceDisplayChar)}: ${x.duration}</li>`;
      });

      if (this._charTimes) this._charTimes.innerHTML = charTimeList;
      localStorage
        .setItem(
          `charTimerSession_${(new Date).toISOString()}`,
          JSON.stringify(this._charTimeArray)
        );
      // this._timer.success();
      return;
    }
    // this._timer.start();
  }

  private getFirstNonMatchingChar = (testPhrase: string): number => {
    if (!this._phrase.value) return 0;
    const sourcePhrase = this._phrase.value.split('');
    if (testPhrase.length == 0) {
      return 0;
    }
    var result = 0;
    for (let i = 0; i < testPhrase.length; i++) {
      if (testPhrase[i] !== sourcePhrase[i]) {
        return i;
      }
      result++;
    };
    return result;
  };
  sayText = (e: KeyboardEvent) => {
    const eventTarget = e.target as HTMLInputElement;
    // Get the input element value
    if (!eventTarget || !eventTarget.value) return;
    let text = eventTarget.value;
    // Get the key that was pressed
    const char = e.key;
    // If no key was pressed, return
    if (!char) return;
    // If the speechSynthesis object is not defined, return
    if (!this.voiceSynth) {
      this.voiceSynth = window.speechSynthesis;
    }
    // If speaking, cancel the speech
    if (this.voiceSynth.speaking) {
      this.voiceSynth.cancel();
    }
    // If the key is a-z or 0-9, use that as the text
    if (char?.match(/^[a-z0-9]$/i)) {
      text = char;
    }
    // If the key is Backspace, say "delete"
    else if (char == "Backspace") {
      text = "delete";
    }
    // If the key is Enter, say the text
    else if (char == "Enter") {
      text = text;
    }
    // If the key is not one of the above, get the last word in the text
    else {
      const textSplit = text.trim().split(' ');
      text = textSplit[textSplit.length - 1];
    }
    // Create a new speech utterance
    var utterThis = new SpeechSynthesisUtterance(text);
    // Set the pitch and rate
    utterThis.pitch = 1;
    utterThis.rate = 0.7;
    // Speak the text
    this.voiceSynth.speak(utterThis);
  }
}

Codeium at 8:38 am, May 10, 2024

The error you're encountering is due to the fact that React hooks, such as useTimer, can only be called from within the body of a functional component or a custom hook. They must adhere to the rules of hooks, which includes being called at the top level (not inside loops, conditions, or nested functions) of a component or hook.

The NextCharsDisplay class you've posted is a plain TypeScript class and not a functional React component. Therefore, you cannot use hooks directly inside of it. Instead, you should manage the state and lifecycle with traditional class component methods, or refactor it into a functional component if you want to use hooks.

If you want to keep NextCharsDisplay as a class and still need access to the centiSecond value from the context, you'll have to find an alternative way. For class components, you can use the Context.Consumer approach.

Refactor the TimerContext to include a consumer:

// TimerContext.tsx
import React from 'react';

// Create the context with a default value.
const TimerContext = React.createContext({
  centiSecond: 0,
  setCentiSecond: (value: number) => {}
});

export default TimerContext;

Then, in your NextCharsDisplay class, you can access the context like this:

import TimerContext from './TimerContext'; // use the correct relative path

export class NextCharsDisplay {
  // ... other class methods and properties ...

  render() {
    return (
      <TimerContext.Consumer>
        {({ centiSecond }) => {
          // You can now use centiSecond in your component's render method.
          // Render your component's UI here.
        }}
      </TimerContext.Consumer>
    );
  }
}

In the render method of your class, you'll have access to centiSecond and can use it as needed. However, if NextCharsDisplay is not a React component and doesn't have a render method (as your current code suggests), then you'll need to restructure your code to use a React component system or pass the centiSecond value down through props or some other form of state management that's compatible with class-based logic.

User at 9:10 am, May 10, 2024

In an earlier conversation I had had with you you said that migration to React from plain TypeScript might be performed incrementally.

You said that it might be possoble to convert smaller TypeScript modules to React components and then call them from the TypeScript modules.

That is what I have been attempting to do in NextCharsDisplay, with your help.

How can we continue with this incremental integration of React?

Codeium at 9:10 am, May 10, 2024

Certainly, an incremental migration from plain TypeScript to React is a common approach. To integrate React components within your existing TypeScript class, you can follow these steps:

Identify parts of your TypeScript class that can be componentized: For example, if you have a method that returns JSX-like markup, this could be a candidate for becoming a React component.
Create standalone React components: Move the identified parts into their own React functional components. Make sure to pass any necessary data as props.
Mount React components from your TypeScript class: Use ReactDOM.createRoot to render your new React components into the DOM from within your TypeScript class methods.

Here's an example of how you could potentially refactor a part of NextCharsDisplay to integrate a React component:

Let's say you have a method that generates a display for next characters:

private formatNextChars(chars: string): string {
  // ...existing logic to format chars...
}

You could create a React component for it:

// NextCharsComponent.tsx
import React from 'react';

interface NextCharsProps {
  chars: string;
}

const NextCharsComponent: React.FC<NextCharsProps> = ({ chars }) => {
  // ...logic to format chars and produce JSX...
  return <div>{/* formatted chars displayed here */}</div>;
};

export default NextCharsComponent;

In your TypeScript class, you can now mount this React component:

// Part of NextCharsDisplay.tsx

// Import the React component at the top
import NextCharsComponent from './NextCharsComponent';

// ...

mountNextCharsComponent(chars: string) {
  // Find the DOM element where you want to mount the React component
  const container = this._nextChars;

  // Use createRoot to render the React component into the container
  const root = createRoot(container); // createRoot(container) if you're using ReactDOM 18+
  root.render(<NextCharsComponent chars={chars} />);
}

// Call mountNextCharsComponent from wherever you need to render the next characters
// For example, in your updateDisplay() method:
updateDisplay(testPhrase: string): void {
  // ...existing logic...
  this.mountNextCharsComponent(nextChars);
}

In the example above, mountNextCharsComponent is a method in your NextCharsDisplay TypeScript class that mounts the NextCharsComponent React component into the DOM.

Remember to ensure that your TypeScript class interacts with the lifecycle of the React component correctly. For instance, if the TypeScript class is removed from the DOM, you should unmount the React component to prevent memory leaks.

This approach allows you to incrementally convert parts of your application into React components and integrate them into the existing system. Over time, you can refactor more parts until the whole application is using React.

User at 9:20 am, May 10, 2024

We already chode a TypeScript module for incremental converstion. It was the convert the class Timer now in OldTimer.ts to Timer.tsx. That timer has a centiSecond property that needs to be read by other TypeScript modules with 100-millisecond accuracy.

You and I chose the class Timer as the conversion subject because it was the smallest TypeScript module in the app.

The class Timer module is a leaf-node module of the app, called by a parent module that is in turn called to other more root node modules.

If I have to convert all the TypeScript modules all the way up to the root in order to convert a leaf-node module to a React component, that does not seem very incremental.

Here is the current Timer.tsx

import React, { useState, useEffect, useImperativeHandle, forwardRef, useRef, createRef } from 'react';
import { useTimer } from './TimerContext';


const Timer = forwardRef((props, ref) => {
 const [centiSecond, setCentiSecond] = useTimer();
 const [isActive, setIsActive] = useState(false);
 const [svgStatus, setSvgStatus] = useState<'start' | 'stop' | 'pause'>('start');

 useEffect(() => {
  let intervalId: NodeJS.Timeout | null = null;

  if (isActive) {
   intervalId = setInterval(() => {
    setCentiSecond(prevCentiSecond => prevCentiSecond + 1);
   }, 10);
  } else if (!isActive && centiSecond !== 0) {
   clearInterval(intervalId!);
  }

  return () => {
   if (intervalId) clearInterval(intervalId);
  };
 }, [isActive, centiSecond]);

 const start = () => {
  setIsActive(true);
  setSvgStatus('pause');
 };

 const stop = () => {
  setIsActive(false);
  setSvgStatus('start');
 };

 const reset = () => {
  setIsActive(false);
  setCentiSecond(0);
  setSvgStatus('start');
 };

 const success = () => {
  console.log("Timer Success");
  setCentiSecond(0);
  setIsActive(false);
  setSvgStatus('start');
 };

 useImperativeHandle(ref, () => ({
  start,
  stop,
  reset,
  success
 }));

 const renderSvg = () => {
  switch (svgStatus) {
   case 'start':
    return <use href="#start" transform="scale(2,2)" />;
   case 'stop':
    return <use href="#stop" transform="scale(2,2)" />;
   case 'pause':
    return <use href="#pause" transform="scale(2,2)" />;
   default:
    return <use href="#stop" transform="scale(2,2)" />;
  }
 };

 return (
  <div>
   <span id="timer">{(centiSecond / 100).toFixed(1)}</span>
   <svg width="15" height="20" style={{ float: 'left' }}>
    {renderSvg()}
   </svg>
   {/* Add buttons or interactions to control the timer */}
  </div>
 );
});

export default Timer;

Codeium at 9:21 am, May 10, 2024

You're correct in wanting to avoid refactoring your entire application at once. The goal of incremental migration is to allow a gradual shift towards React without the need for a full rewrite. In your case, since you've already created a Timer component in React and are managing its state with context, you can make the centiSecond value available to non-React parts of your app through a more imperative approach.

Here's how you can proceed:

Expose a subscription mechanism: Create a function in your TimerContext that allows non-React modules to subscribe to centiSecond updates.
Update TimerContext to notify subscribers: Whenever centiSecond is updated, notify all subscribers with the new value.
Use the subscription in non-React modules: In your TypeScript modules, subscribe to centiSecond updates and use the value as needed.

Here's an example of how you could implement this:

Extend your TimerContext to include subscription logic:

// TimerContext.tsx

import React, { createContext, useContext, useState, useEffect } from 'react';

const TimerContext = createContext({
  centiSecond: 0,
  setCentiSecond: (value: number) => {},
  subscribe: (callback: (centiSecond: number) => void) => {},
  unsubscribe: (callback: (centiSecond: number) => void) => {}
});

const TimerProvider: React.FC = ({ children }) => {
  const [centiSecond, setCentiSecond] = useState(0);
  const subscribers = new Set<(centiSecond: number) => void>();

  useEffect(() => {
    subscribers.forEach(callback => callback(centiSecond));
  }, [centiSecond]);

  const subscribe = (callback: (centiSecond: number) => void) => {
    subscribers.add(callback);
  };

  const unsubscribe = (callback: (centiSecond: number) => void) => {
    subscribers.delete(callback);
  };

  return (
    <TimerContext.Provider value={{ centiSecond, setCentiSecond, subscribe, unsubscribe }}>
      {children}
    </TimerContext.Provider>
  );
};

export { TimerProvider, TimerContext };

Then, in your non-React TypeScript module, you could subscribe to changes like this:

// Some TypeScript module
import { TimerContext } from './TimerContext';

// ... inside some class or function that needs to subscribe to centiSecond updates

const handleCentiSecondUpdate = (newCentiSecond: number) => {
  // Do something with the updated centiSecond value
};

const timerContext = TimerContext._currentValue; // This is a bit of a hack to directly access the current value
timerContext.subscribe(handleCentiSecondUpdate);

// Don't forget to unsubscribe when you're done
timerContext.unsubscribe(handleCentiSecondUpdate);

Please note that directly accessing the _currentValue is not a recommended practice as it breaks the encapsulation of the context and may not work in future versions of React. It's used here just as an illustrative example.

A more robust solution would be to create a small React component that subscribes to the context and then uses a more traditional event emitter or callback pattern to communicate with your non-React modules.

Keep in mind that the above methodology is a workaround and is not the idiomatic way to use React's context system. It is meant as a temporary bridge during your incremental migration to React. Once your application is fully migrated, you should rely on proper React patterns for state management.

User at 9:38 am, May 10, 2024

I like that solution very much, but I only need to poll centiSecond periodically. I think the pub-sub pattern might be too resource-heavy.

Codeium at 9:38 am, May 10, 2024

If you only need to poll the centiSecond value periodically rather than reacting to every change, you can simply export a function from your React context that returns the current centiSecond value. This approach is lighter than a pub-sub pattern and might work well for your situation.

First, ensure that your TimerContext provides a way to get the current centiSecond value:

// TimerContext.tsx

import React, { createContext, useContext, useState } from 'react';

const TimerContext = createContext({
  centiSecond: 0,
  setCentiSecond: (value: number) => {},
  getCentiSecond: () => 0  // Add a getter function for centiSecond
});

const TimerProvider: React.FC = ({ children }) => {
  const [centiSecond, setCentiSecond] = useState(0);
  
  const getCentiSecond = () => centiSecond; // Implement the getter function

  return (
    <TimerContext.Provider value={{ centiSecond, setCentiSecond, getCentiSecond }}>
      {children}
    </TimerContext.Provider>
  );
};

export { TimerProvider, TimerContext };

Then, in a non-React TypeScript module, you could periodically poll for the centiSecond value like this:

// Some TypeScript module
import { TimerContext } from './TimerContext';

// A function to get the current centiSecond value
const getCurrentCentiSecond = () => {
  const timerContext = TimerContext._currentValue;  // Access the context's current value
  return timerContext.getCentiSecond();
};

// Use the function to poll the centiSecond value
setInterval(() => {
  const centiSecond = getCurrentCentiSecond();
  // Do something with the centiSecond value
}, 100); // Poll every 100 milliseconds

As I mentioned before, accessing _currentValue is not a standard practice and is generally discouraged because it relies on internal variables that could change in future versions of React. It's presented here for illustrative purposes.

A better approach would be to expose getCentiSecond via a custom hook or a higher-order component that can then provide the value to non-React parts of your codebase. But if you're working with non-React code, you might not have the option to use these patterns.

As a side note, if you intend to use this method in production, I would recommend finding a more appropriate way to expose the necessary data from React to your non-React modules, such as through a shared state management library or a more traditional event emitter pattern that can be used outside of the React component tree.

User at 10:39 am, May 10, 2024

I would like to pursue your suggestion of using a custom hook or a shared state management library or more traditional event emitter pattern.

Whatever would allow me to continue with an incremental refactoring of my TypeScript modules to React components.

Currently, the site loads in the browser but I get ns-hugo:C:\Users\xge…sets\ts\Timer.tsx:6 Uncaught TypeError: useTimer is not a function or its return value is not iterable in the dev tools console.

I also noticed that I am getting this in PowerShell:

🕐[10:07:01]❯ npm ls react
handex.io@1.0.0 C:\Users\xgenx\source\repos\handex.io
├─┬ react-dom@18.3.1
│ └── react@18.3.1 deduped
└── react@18.3.1

Codeium at 10:40 am, May 10, 2024

The error message Uncaught TypeError: useTimer is not a function or its return value is not iterable indicates that there is an issue with how the useTimer hook is being used or imported. It could be one of the following issues:

The import path for useTimer is incorrect.
The useTimer hook is not properly exported from its module.
The useTimer hook is being called outside of a functional React component or custom hook.

First, ensure that the useTimer hook is correctly exported from the TimerContext.tsx file:

// TimerContext.tsx
export const useTimer = () => {
  const context = useContext(TimerContext);
  if (context === undefined) {
    throw new Error('useTimer must be used within a TimerProvider');
  }
  return context;
};

Then, make sure that you're importing it correctly:

// Timer.tsx
import { useTimer } from './TimerContext'; // Ensure the path is correct

Finally, useTimer must be called within a React functional component or another custom hook:

// Timer.tsx
const Timer = forwardRef((props, ref) => {
  const { centiSecond, setCentiSecond } = useTimer(); // This is correct if Timer is a React component
  // ...
});

Given that you're seeing the correct version of React in your npm list, the issue is likely not with multiple React versions.

For the incremental refactoring approach, you can use one of the following strategies:

Custom Hook: If you have a React component that needs to provide state to a non-React module, you could create a custom hook in your React app that interacts with the global state or event emitter.
Shared State Management Library: Use Redux, MobX, or another state management library that can be accessed outside of React components. This way, both React and non-React parts of your application can interact with the state.
Event Emitter: Use a simple event emitter pattern or a library like mitt or EventEmitter3 to create a global event bus that can publish and subscribe to events. This can be a good bridge between React and non-React code.

For the event emitter approach, here's an example using mitt:

npm install mitt

Create an event emitter instance:

// eventBus.ts
import mitt from 'mitt';

const emitter = mitt();
export default emitter;

In your React Timer component, emit the centiSecond update:

// Timer.tsx
import emitter from './eventBus';

const Timer = forwardRef((props, ref) => {
  const [centiSecond, setCentiSecond] = useTimer();
  
  useEffect(() => {
    // Emit an event whenever centiSecond updates
    emitter.emit('centiSecondUpdate', centiSecond);
  }, [centiSecond]);

  // ...
});

In your non-React TypeScript module, subscribe to the centiSecondUpdate event:

// Some TypeScript module
import emitter from './eventBus';

emitter.on('centiSecondUpdate', (centiSecond) => {
  // Do something with the centiSecond value
});

Remember to unsubscribe from events when they are no longer needed to prevent memory leaks:

// Some TypeScript module
const handleCentiSecondUpdate = (centiSecond) => {
  // Do something with the centiSecond value
};

// Subscribe to the event
emitter.on('centiSecondUpdate', handleCentiSecondUpdate);

// Later, when it's appropriate to clean up
emitter.off('centiSecondUpdate', handleCentiSecondUpdate);

This approach allows you to continue working with your existing TypeScript modules while gradually introducing React components and managing shared state or events between them.

User at 10:56 am, May 10, 2024

I would like to look at mitt, but I see that that depends on useTimer, which is currently not working. I think it also eliminates the need to import TimerContext

So, can you help me further with the useTimer problem?

this is my TimerContext.tsx

import React, { createContext, useContext, useState, useEffect } from 'react';

// Create a context object
const TimerContext = createContext({
 centiSecond: 0,
 setCentiSecond: (value: number) => {},
 getCentiSecond: () => 0,
});

// Context Provider component
const TimerProvider: React.FC = ({ children }) => {
 const [centiSecond, setCentiSecond] = useState(0);
 // The rest of your timer logic...
 const getCentiSecond = () => centiSecond;

 return (
  <TimerContext.Provider value={{ centiSecond, setCentiSecond, getCentiSecond }}>
   {children}
  </TimerContext.Provider>
 );
};

// Custom hook to use the context
const useTimer = () => {
 const context = useContext(TimerContext);
 if (context === undefined) {
  throw new Error('useTimer must be used within a TimerProvider');
 }
 return context;
};

export { TimerProvider, TimerContext, useTimer };

Codeium at 10:57 am, May 10, 2024

Your TimerContext.tsx looks correct, and the useTimer hook is properly defined and exported. If useTimer is not working, then the issue might be with how you're using it within your components. Here are a few things to check:

Ensure TimerContext.Provider is above useTimer in the component tree: The useTimer hook must be called within a component that is a descendant of TimerContext.Provider. Make sure that TimerProvider is used at a high level in your app to provide the context for all components that need it.
Check the import statement in Timer.tsx: Make sure that you are importing useTimer from the correct file. For instance, the import should look like this:

// Timer.tsx
import { useTimer } from './TimerContext'; // Ensure this path matches the location of TimerContext.tsx

Check if Timer.tsx is a functional React component: The useTimer hook can only be called inside functional React components or custom hooks. Ensure that Timer is indeed a functional component. Based on the code you provided earlier, it seems to be correct.
Check for typos or file path issues: It's possible that there is a typo in the file path or the file name when importing useTimer. Double-check the file paths and names.
Ensure there is no cyclic dependency: If TimerContext.tsx and Timer.tsx import from each other, it could cause issues with the import resolution. Make sure that there is a clear hierarchy and no cyclic dependency between these files.
Check for multiple instances of React: Having multiple instances of React can cause hooks to behave unexpectedly. It seems from your npm ls react output that this is not the issue, but it's worth double-checking if you have a complex setup.
Confirm that your build process is running correctly: Ensure that your build process is successfully compiling the TypeScript files into JavaScript. Sometimes, changes might not be picked up due to caching or build issues.
Check the browser console for additional errors: Sometimes, other errors might precede the useTimer error and could provide more context on what's going wrong.

If all the above checks out and you're still experiencing issues, it might help to see more of the component hierarchy, especially where TimerProvider is used in relation to Timer.tsx. There could be something about the way the context is being provided and consumed that's causing the problem.

User at 11:02 am, May 10, 2024

Here is my assets/ts

🕐[10:59:57]❯ get-childitem -path assets/ts -Recurse                               

  Directory: C:\Users\xgenx\source\repos\handex.io\assets\ts

Mode         LastWriteTime     Length Name
----         -------------     ------ ----
d----      5/9/2024 7:46 PM        terminal
d----      5/9/2024 9:30 PM        types
d----      5/9/2024 7:46 PM        utils
-a---      5/7/2024 2:42 PM     15624 allChords.ts
-a---      5/9/2024 12:56 PM      138 chord-phrase.ts
-a---      5/8/2024 9:51 PM     10111 HandChord.ts
-a---      5/10/2024 10:20 AM     19601 NextCharsDisplay.tsx
-a---      5/9/2024 6:01 PM      3671 OldTimer.ts
-a---      5/5/2024 2:39 PM      4076 phrases.json
-a---      5/6/2024 11:46 AM      932 Timer.test.ts
-a---      5/10/2024 10:52 AM      1976 Timer.tsx
-a---      5/10/2024 10:24 AM      880 TimerContext.tsx

  Directory: C:\Users\xgenx\source\repos\handex.io\assets\ts\terminal

Mode         LastWriteTime     Length Name
----         -------------     ------ ----
-a---      5/7/2024 11:10 AM      6231 HandexTerm.ts
-a---      5/9/2024 4:52 PM      1051 main.ts
-a---      5/3/2024 3:51 PM      662 Persistence.ts
-a---      5/1/2024 10:55 PM      988 terminal-data.ts
-a---      5/1/2024 10:55 PM      220 TerminalGame.ts
-a---      5/1/2024 10:55 PM      2247 TerminalInputElement.ts
-a---      5/6/2024 3:40 PM      1113 TerminalTypes.ts
-a---      5/1/2024 10:55 PM      2171 WPMCalculator.ts
-a---      5/1/2024 10:55 PM      1815 XtermAdapter.test.ts
-a---      5/9/2024 7:43 PM     10397 XtermAdapter.ts

  Directory: C:\Users\xgenx\source\repos\handex.io\assets\ts\types

Mode         LastWriteTime     Length Name
----         -------------     ------ ----
-a---      5/9/2024 9:30 PM      148 svg.d.ts
-a---      5/7/2024 2:41 PM      581 Types.ts

  Directory: C:\Users\xgenx\source\repos\handex.io\assets\ts\utils

Mode         LastWriteTime     Length Name
----         -------------     ------ ----
-a---      5/6/2024 11:17 AM      525 dom.ts
-a---      5/2/2024 11:39 PM      1602 WebCam.ts

And here is my Timer.tsx

import React, { useState, useEffect, useImperativeHandle, forwardRef, useRef, createRef } from 'react';
import { useTimer, TimerContext } from './TimerContext';


const Timer = forwardRef((props: any, ref: any) => {
 const [centiSecond, setCentiSecond] = useTimer();
 const [isActive, setIsActive] = useState(false);
 const [svgStatus, setSvgStatus] = useState<'start' | 'stop' | 'pause'>('start');

 useEffect(() => {
  let intervalId: NodeJS.Timeout | null = null;

  if (isActive) {
   intervalId = setInterval(() => {
    setCentiSecond((prevCentiSecond: number) => prevCentiSecond + 1);
   }, 10);
  } else if (!isActive && centiSecond !== 0) {
   clearInterval(intervalId!);
  }

  return () => {
   if (intervalId) clearInterval(intervalId);
  };
 }, [isActive, centiSecond]);

 const start = () => {
  setIsActive(true);
  setSvgStatus('pause');
 };

 const stop = () => {
  setIsActive(false);
  setSvgStatus('start');
 };

 const reset = () => {
  setIsActive(false);
  setCentiSecond(0);
  setSvgStatus('start');
 };

 const success = () => {
  console.log("Timer Success");
  setCentiSecond(0);
  setIsActive(false);
  setSvgStatus('start');
 };

 useImperativeHandle(ref, () => ({
  start,
  stop,
  reset,
  success
 }));

 const renderSvg = () => {
  switch (svgStatus) {
   case 'start':
    return <use href="#start" transform="scale(2,2)" />;
   case 'stop':
    return <use href="#stop" transform="scale(2,2)" />;
   case 'pause':
    return <use href="#pause" transform="scale(2,2)" />;
   default:
    return <use href="#stop" transform="scale(2,2)" />;
  }
 };

 return (
  <div>
   <span id="timer">{(centiSecond / 100).toFixed(1)}</span>
   <svg width="15" height="20" style={{ float: 'left' }}>
    {renderSvg()}
   </svg>
   {/* Add buttons or interactions to control the timer */}
  </div>
 );
});

export default Timer;

Codeium at 11:03 am, May 10, 2024

Based on the provided Timer.tsx and TimerContext.tsx files, the usage of useTimer seems to be correct. However, the error you're encountering suggests that the useTimer hook is not being recognized as a function, which points to a potential issue with the way your context or hook is set up or imported.

Here are a few steps to troubleshoot the issue:

Check if you have a default export conflict: Make sure that useTimer is not being overridden by another default export in TimerContext.tsx. Since you're using named exports for useTimer, there should not be a default export that conflicts with it.
Verify the TimerContext.Provider is wrapping your app: Ensure that your app is wrapped with TimerProvider at a higher level, which is a common mistake. Without TimerProvider, the context will not be available to Timer.tsx.
Check for circular dependencies: Make sure there are no circular dependencies between your Timer.tsx and TimerContext.tsx. This could cause the module to be evaluated before it's fully defined.
Ensure the file extensions are correctly resolved: Sometimes build tools might have issues with resolving .tsx extensions properly. Make sure your build configuration is set up to handle .tsx files.
Log the import: Temporarily add a console.log statement to log useTimer right after the import statement in Timer.tsx to see what's being imported. This can help identify if the import is incorrect.
Reinstall node modules: Occasionally, the node_modules directory can get into a bad state. Try deleting the node_modules directory and your package-lock.json or yarn.lock file and reinstalling the dependencies.
Check for typos in the file path: Make sure that the path in the import statement in Timer.tsx for useTimer is correct relative to the location of TimerContext.tsx.
Ensure that the TimerContext is properly exported and imported: In TimerContext.tsx, you have a named export for TimerContext. Make sure there's no conflict with other imports named TimerContext elsewhere in your code.
Check the build output: Ensure that the compiled output in your dist or build directory is up to date and that there are no errors during the build process.

If after all these checks the issue persists, it may be helpful to recreate the issue in an isolated environment or share a larger portion of the codebase for further inspection.

User at 11:04 am, May 10, 2024

Here is the entire text of TimerContext.tsx

import React, { createContext, useContext, useState, useEffect } from 'react';

// Create a context object
const TimerContext = createContext({
 centiSecond: 0,
 setCentiSecond: (value: number) => {},
 getCentiSecond: () => 0,
});

// Context Provider component
const TimerProvider: React.FC = ({ children }) => {
 const [centiSecond, setCentiSecond] = useState(0);
 // The rest of your timer logic...
 const getCentiSecond = () => centiSecond;

 return (
  <TimerContext.Provider value={{ centiSecond, setCentiSecond, getCentiSecond }}>
   {children}
  </TimerContext.Provider>
 );
};

// Custom hook to use the context
const useTimer = () => {
 const context = useContext(TimerContext);
 if (context === undefined) {
  throw new Error('useTimer must be used within a TimerProvider');
 }
 return context;
};

export { TimerProvider, TimerContext, useTimer };

Codeium at 11:05 am, May 10, 2024

The TimerContext.tsx file appears to be correctly set up, and the useTimer hook is correctly defined and exported. The issue is likely not in this file but rather in how the context and hook are being used within your application.

Here are some additional steps to troubleshoot the useTimer error:

Check the Provider placement: Confirm that your main application component is wrapped with TimerProvider. If TimerProvider is not correctly placed in the component hierarchy, the context will not be available to components that call useTimer.
Check that Timer is used within TimerProvider: The Timer component, which utilizes useTimer, must be a descendent of TimerProvider in the component tree.
Check your build and bundling process: It's possible that the transpilation or bundling process is not handling your context and hook correctly. Check your webpack, Babel, or TypeScript configuration to ensure they are set up to handle React and hooks correctly.
Simplify the context: As a debugging step, simplify the context to only provide centiSecond and setCentiSecond, without the getCentiSecond method, to see if that changes anything. This will help identify if the issue is with the structure of the context value.
Check for multiple React instances: Although it seems from your npm ls react output that this is not the issue, it's worth making sure that your bundler is not somehow including multiple instances of React, which can cause hook errors.
Logging: Add a console.log statement inside the useTimer hook to log the context value and make sure it's not undefined. Also, add a log to see if useTimer is a function before you attempt to destructure its return value in the Timer component.
Restart your development server: Sometimes, development servers can cache modules. Restarting the server can ensure that the latest code is being served.
Check for a stale cache: If you're using a tool like Babel or TypeScript with a cache, try clearing the cache to ensure it's not a caching issue.
Use default context value: Ensure that you are providing a default value for the context that matches the shape of the value you're expecting. This includes making sure that the functions are callable.
Validate the entire app structure: It might be worth checking the entire structure of your app to see if there's any part of the component tree that could be causing the context to be lost or not properly passed down.

If none of these steps resolve the issue, consider creating a minimal reproduction of the problem in a new project or using an online code playground like CodeSandbox. This could help isolate the problem and make it easier to spot any potential configuration or usage issues.

2024 05 09 sharing centisecond values across react modules using context and hooks - bizkite-co/handterm GitHub Wiki

Throughout the interaction, I provided guidance and solutions related to state management using context in React, handling context errors, and context usage scenarios within different components/modules. date: 2024-05-09T21:42

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2024 05 09 sharing centisecond values across react modules using context and hooks - bizkite-co/handterm GitHub Wiki

Throughout the interaction, I provided guidance and solutions related to state management using context in React, handling context errors, and context usage scenarios within different components/modules. date: 2024-05-09T21:42

Codeium Chat Conversation

⚠️ **GitHub.com Fallback** ⚠️

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