Step 1: Setup Supabase Project
 

• First, sign up on Supabase if you haven’t already.
• Once logged in, create a new project by clicking on “New Project” in your Supabase dashboard.
• Fill in the required information like Project Name, Database Password and select the appropriate region. Click "Create new project."
• Wait for your project to be provisioned. Once done, you will be redirected to your project dashboard. Note down the URL and the API key from the settings as you will need them later.

  Step 2: Setup Database Schema  

• Navigate to the “Table Editor” in Supabase.
• Create a new table by clicking on the "New Table" button.
• Name your table (e.g., "timers"), and add the following fields:
  • id: INTEGER, Primary Key, AUTOINCREMENT.
  • name: TEXT
  • start\_time: TIMESTAMP
  • end\_time: TIMESTAMP
  • elapsed\_time: INTERVAL
  • is\_running: BOOLEAN
• Save the table once you have added all necessary fields.

  Step 3: Integrate Supabase with Frontend Framework  

• Decide on a frontend framework such as React, Vue, or Angular for building the interface.
• Create a new project with your chosen framework. For instance, for React: `npx create-react-app supabase-timer`.
• Install Supabase client library in your project: `npm install @supabase/supabase-js`.

  Step 4: Initialize Supabase Client  

• Create a new file in your project (e.g., supabaseClient.js).
• Initialize the Supabase client with your Project URL and API key. Example code: \`\`\` import { createClient } from '@supabase/supabase-js';

      const supabaseUrl = 'https://xyzcompany.supabase.co';
      const supabaseKey = 'public-anon-key';
      export const supabase = createClient(supabaseUrl, supabaseKey);
      \`\`\`</li>
  

  Step 5: Build Timer and Stopwatch UI  

• Create components for Timer and Stopwatch using your chosen frontend framework. Make sure to handle states for start time, end time, and elapsed time.
• Ensure that you create buttons to start, stop, pause, and reset the timer/stopwatch.
• Design your UI by using CSS or any UI library such as Material-UI or Bootstrap.

  Step 6: CRUD operations with Supabase  

• Use the Supabase client to perform Create, Read, Update, and Delete operations on the "timers" table.
• Create functions to handle each operation. For example, to add a new timer: \`\`\` async function addTimer(timer) { const { data, error } = await supabase.from('timers').insert([ { name: timer.name, start_time: timer.start_time, end_time: timer.end_time, elapsed_time: timer.elapsed_time, is_running: timer.is_running } ]);

          if (error) throw error;
  
          return data;
      }
      \`\`\`</li>
  <li>Repeat similar methods for updating and deleting timer entries.</li>
  

  Step 7: Display Timer Data  

• Fetch Timer data from the Supabase table and display it in your frontend.
• Create a function to get the list of timers: \`\`\` async function fetchTimers() { let { data: timers, error } = await supabase .from('timers') .select('\*')

          if (error) throw error;
  
          return timers;
      }
      \`\`\`</li>
  <li>Use the fetched data to dynamically render timer entries in your UI.</li>
  

  Step 8: Handle Timer Logic  

• Implement logic to handle the start, stop, and reset functionalities for both Timer and Stopwatch.
• Use JavaScript intervals or dates to calculate the elapsed time and update the Supabase database accordingly.
• Make sure to handle any edge cases such as overlapping intervals or invalid time values.

  Step 9: Test your application  

• Run your application and ensure all functionalities like starting, stopping, resetting, and fetching timers are working as expected.
• Test with different scenarios to make sure the timer and stopwatch functionality is reliable and robust.
• Debug and fix any issues that arise during testing.

  Step 10: Deploy your application  

• Once you have tested and confirmed that everything is working fine, deploy your application.
• You can use platforms like Vercel, Netlify, or any other hosting provider of your choice.
• Ensure that your Supabase environment variables are correctly configured in the deployment settings.

  Congratulations!  

• You have successfully built a Timer and Stopwatch application using Supabase!