Separating vendor and application code in Webpack for optimized bundling

Question

Separating vendor and application code in Webpack for optimized bundling

Recently, I created a React+Webpack project and noticed that it takes 60 seconds to build the initial bundle, and only 1 second to append incremental changes. Surprisingly, this is without even adding my application code yet! It seems that the node_modules bundle is very resource-intensive. I attempted to split the bundles using common chunks, but unfortunately, it did not result in any performance improvements.

I am curious, how can I configure Webpack to bundle node_modules only once, without continuously watching for updates in this directory?

javascript npm webpack

Answer 1

Answer №1

If you're facing an issue, there's no requirement to package external dependencies in your project. Instead, you can incorporate them as external dependencies by adding the scripts to your page.

For instance, if you decide to include the react and react-dom scripts on your page, you can specify this in the webpack config file like so:

{
  externals: {
    'react': 'React',
    'react-dom': 'ReactDOM'
  } 
}

This configuration instructs webpack that whenever it encounters a require('react') or webpack statement, it should return a global variable named React. The same applies for require('react-dom').

Furthermore, when using loaders, ensure to either include the necessary files or exclude those that are not needed.

Here's an example of excluding node_modules:

{
  module: {
    loaders: [
      {
        test: /\.jsx?/,
        exclude: /node_modules/,
        loader: 'babel'
      }
    ]
  }
}

Alternatively, for better performance, you can specifically include the required files:

{
  module: {
    loaders: [
      {
        test: /\.jsx?/,
        include: './src',
        loader: 'babel'
      }
    ]
  }
}

Answer 2

If you're facing an issue, there's no requirement to package external dependencies in your project. Instead, you can incorporate them as external dependencies by adding the scripts to your page.

For instance, if you decide to include the react and react-dom scripts on your page, you can specify this in the webpack config file like so:

{
  externals: {
    'react': 'React',
    'react-dom': 'ReactDOM'
  } 
}

This configuration instructs webpack that whenever it encounters a require('react') or webpack statement, it should return a global variable named React. The same applies for require('react-dom').

Furthermore, when using loaders, ensure to either include the necessary files or exclude those that are not needed.

Here's an example of excluding node_modules:

{
  module: {
    loaders: [
      {
        test: /\.jsx?/,
        exclude: /node_modules/,
        loader: 'babel'
      }
    ]
  }
}

Alternatively, for better performance, you can specifically include the required files:

{
  module: {
    loaders: [
      {
        test: /\.jsx?/,
        include: './src',
        loader: 'babel'
      }
    ]
  }
}

Separating vendor and application code in Webpack for optimized bundling

Answer №1

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