@kotify/neutrino-typescript/index.js

Neutrino middleware for typescript support

const merge = require("deepmerge");
const babelMerge = require("babel-merge");
const ForkTsCheckerWebpackPlugin = require("fork-ts-checker-webpack-plugin");

module.exports =
  (options = {}) =>
  (neutrino) => {
    neutrino.config.resolve.extensions.add(".tsx").add(".ts");
    neutrino.config.module
      .rule("compile")
      .test(/\.(mjs|jsx|js|tsx|ts)$/)
      .use("babel")
      .tap((options) =>
        babelMerge(options, {
          presets: [require.resolve("@babel/preset-typescript")],
        })
      );

    if (process.env.NODE_ENV === "development") {
      const forkTSChecker = merge(
        { enable: true, options: { typescript: { mode: "write-references" } } },
        options.forkTSChecker || {}
      );
      if (forkTSChecker.enable) {
        neutrino.config
          .plugin("fork-ts-checker")
          .use(ForkTsCheckerWebpackPlugin, [forkTSChecker.options]);
      }
    }
  };