Run typescript on other file formats.

[rosostolato]

I created a vite plugin that converts a custom file with a custom extension to typescript code. The problem is that typescript is only listening for ".ts" files. How can I make it load my custom files too?

[rosostolato]

I found a working solution. Please let me know if I can make it better

export default function (): Plugin {
  return {
    name: 'vite-plugin-my-ext',
    enforce: 'pre',
    config(config) {
      return {
        ...config,
        esbuild: {
          ...config.esbuild,
          include: /\.(js|ts|myext)$/, // .myext
          loader: 'ts',
        },
      };
    },
    transform(code, id) {
      return isMyExt(id) ? preprocessFile(code, id) : code;
    },
  };
}