UPDATE 3/26/2026

I have resolved the "large chunks" build warning by implementing code splitting and optimizing the build configuration.

Here is a summary of the changes:

  1. Implemented Dynamic Imports (React.lazy):

    • Updated ContextProvider.tsx to use React.lazy(() => import(...)) instead of static imports for all tool components (including the new Mortgage tool and About page).
    • This ensures that each tool is bundled into its own separate chunk and only loaded when needed, rather than being part of the initial main bundle.

  2. Added Suspense for Lazy Loading:

  3. Optimized vite.config.ts:

    • Added a manualChunks strategy to separate vendor libraries (like React and Ionic) into a dedicated vendor chunk.
    • Increased chunkSizeWarningLimit to 1600kB to suppress warnings for the vendor chunk, which is expected to be large but cacheable.

  4. Updated create-new-Ionic-component.sh:

    • Modified the script to generate new components with lazy loading syntax by default, ensuring future tools also follow this optimized pattern.

You can now run ionic build again, and the large chunk warning should be resolved or significantly reduced. The application will also load faster initially as it no longer downloads all tools at startup

I have resolved the static import warning for Home.tsx.

By removing the static import of Home in App.tsx and the explicit <Route path="/index/home">, the application will now rely on the existing dynamic routing mechanism (/:pageName/:pageName) in Page.tsx to load the Home component.

This means:

  1. Home.tsx is no longer imported statically, so it won't be bundled twice.
  2. When you navigate to /index/home, the Page component will handle the route, extract the pageName (which is "home"), and dynamically load the Home component from the ContextProvider using React.lazy.

This should eliminate the build warning and ensure proper code splitting for the Home page as well.

 

 

UPDATE: 1/23/26

Today I got the error again:

(!) Some chunks are larger than 500 kBs after minification. Consider:
- Using dynamic import() to code-split the application
- Use build.rollupOptions.output.manualChunks to improve chunking: https://rollupjs.org/configuration-options/#output-manualchunks
- Adjust chunk size limit for this warning via build.chunkSizeWarningLimit.
✓ built in 4.81s

Solution: Change the vite.config.js file and added the build: property like this:

export default defineConfig({
  server: { https: true,host: true  },
  plugins: [react(),basicSsl()],
  base: '/',
  build: {
    chunkSizeWarningLimit: 1600,
    rollupOptions: {
        output: {
            manualChunks(id) {
                if (id.includes('node_modules')) {
                    return id.toString().split('node_modules/')[1].split('/')[0].toString();
                }
            }
        }
    }
  }
})

This is how I was able to fix this warning error in my react application with vitejs in a react typescript project.

I was able to resolved the chunk size warning by configuring manualChunks in vite.config.ts.

Do this also:

  1. split the dependencies into three separate chunks:
  2. google-ai: Contains @google/generative-ai and @google/genai.
  3. react-vendor: Contains react, react-dom, and react-router-dom.
  4. vendor: Contains any other node_modules.
  5. The build output now shows all chunks are well under the 500 kB limit:
react-vendor: ~224 kB
google-ai: ~248 kB
vendor: ~40 kB
index (app code): ~10 kB
You can verify this by running npm run build again.

After this I tried npm run build and no longer seen the message again.

vite.configs.ts

import { defineConfig } from 'vite'
import react from '@vitejs/plugin-react'

import basicSsl from '@vitejs/plugin-basic-ssl'

// https://vite.dev/config/
export default defineConfig({
  plugins: [react(), basicSsl()],
  build: {
    rollupOptions: {
      output: {
        manualChunks(id) {
          if (id.includes('node_modules')) {
            if (id.includes('@google/generative-ai') || id.includes('@google/genai')) {
              return 'google-ai';
            }
            if (id.includes('react') || id.includes('react-dom') || id.includes('react-router-dom')) {
              return 'react-vendor';
            }
            return 'vendor';
          }
        },
      },
    },
  },
})

 reponse:

I've updated vite.config.ts to address the chunk size warning.

I implemented two changes:

  1. Code Splitting (manualChunks): I configured Vite to split your dependencies into separate cacheable chunks:
    • react-vendor: React, React DOM, React Router
    • mui-vendor: Material UI and Emotion
    • google-genai: Google Generative AI libraries
    • vendor: All other node modules
  2. Increased Warning Limit (chunkSizeWarningLimit): I raised the warning threshold to 1000 kB (1 MB) to accommodate larger libraries that might slightly exceed the default 500 kB limit even after splitting.

You can now run npm run build again, and the warning should be resolved.

resolved.