Differences between ts-loader and babel-loader when working with TypeScript in webpack

Recently, I set out to compare the compiled output code between these two configurations.

ts-loader

  {
    test: /\.tsx?$/,
    use: 'ts-loader',
  }

babel-loader

  use: {
      loader: 'babel-loader',
      options: {
        presets:
          [
            "@babel/preset-react",
            "@babel/preset-typescript",
          ]
      }
    }
  • Interestingly, the compiling times for babel-loader were consistently lower than those for ts-loader.
  • On top of that, ts-loader appears to be utilizing babel under its hood, as indicated by its dependencies.
  • Furthermore, babel-loader offers the advantage of using cache with cacheDirectory.

Inquiries

  1. Is there a method to implement caching in ts-loader similar to how cacheDirectory operates in babel?
  2. Are there any additional benefits to using ts-loader instead of babel-loader?

Answer №1

If you're curious about this topic:

  1. One person mentioned a helpful experimental feature in ts-loader that allows for caching. For more details, refer to the configuration reference here: https://github.com/TypeStrong/ts-loader#experimentalfilecaching
  2. To note, babel does not provide its own typechecking capabilities, so TSC would need to be used for that purpose. Additionally, it does not support the 'const enum' syntax of ts...

You also have the option to combine both tools, using ts-loader for development and babel for production builds.

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