package.json

{
  "name": "blabla",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "dev": "npm run development",
    "development": "cross-env NODE_ENV=development node_modules/webpack/bin/webpack.js --progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js",
    "watch": "npm run development -- --watch",
    "watch-poll": "npm run watch -- --watch-poll",
    "hot": "cross-env NODE_ENV=development node_modules/webpack-dev-server/bin/webpack-dev-server.js --inline --hot --config=node_modules/laravel-mix/setup/webpack.config.js",
    "prod": "npm run production",
    "production": "cross-env NODE_ENV=production node_modules/webpack/bin/webpack.js --no-progress --hide-modules --config=node_modules/laravel-mix/setup/webpack.config.js"
  },
  "devDependencies": {
    "cross-env": "^7.0",
    "laravel-mix": "^5.0.4",
    "resolve-url-loader": "^3.1.1",
    "sass": "^1.26.5",
    "sass-loader": "^8.0.2",
    "vue-template-compiler": "^2.6.11"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "ts-loader": "^7.0.5",
    "typescript": "^3.9.3"
  },
  "-vs-binding": { "ProjectOpened": [ "dev" ] }
}

webpack.mix.js

const mix = require('laravel-mix');

/*
 |--------------------------------------------------------------------------
 | Mix Asset Management
 |--------------------------------------------------------------------------
 |
 | Mix provides a clean, fluent API for defining some Webpack build steps
 | for your Laravel application. By default, we are compiling the Sass
 | file for the application as well as bundling up all the JS files.
 |
 */

mix
    .ts("ts/index.ts", "wwwroot/js")
    .sass('scss/main.scss', 'wwwroot/css')
    .webpackConfig({
        module: {
            rules: [
                {
                    test: /\.tsx?$/,
                    loader: "ts-loader",
                    exclude: /node_modules/
                }
            ]
        },
        resolve: {
            extensions: ["*", ".js", ".jsx", ".ts", ".tsx"]
        }
    });