The “conflict: multiple chunks emit assets to the same filename” error in webpack occurs when multiple chunks (i.e., code bundles) have the same name and are being output to the same file. This can happen when you have multiple entry points in your webpack configuration and each entry point generates a chunk with the same name.

To fix this error, you need to ensure that each chunk has a unique name. You can do this by setting the output.filename option in your webpack configuration to use a unique placeholder for each chunk, such as the chunk hash or chunk ID. For example:

output: {
filename: '[name].[chunkhash].js'
}

This will generate unique filenames for each chunk based on the chunk hash, which will prevent the “conflict: multiple chunks emit assets to the same filename” error.

You can also use the SplitChunksPlugin to automatically split your code into chunks and assign unique names to each chunk based on the module dependencies. For example:

optimization: {
splitChunks: {
chunks: 'all'
}
}

This will automatically split your code into chunks and assign unique names to each chunk based on the module dependencies, which will help to prevent the “conflict: multiple chunks emit assets to the same filename” error.

Overall, the key to fixing the “conflict: multiple chunks emit assets to the same filename” error in webpack is to ensure that each chunk has a unique name. By using the output.filename option and the SplitChunksPlugin, you can easily assign unique names to your chunks and avoid this error.