typescript webpack init

Install

 yarn add webpack webpack-dev-server typescript ts-loader
 yarn add webpack-cli --dev

Modifying Package.json

 // Add this
  "scripts": {
    "start": "webpack-dev-server --mode development"
  },

Setting up webpack.config.js

const path = require('path');

module.exports = {
  entry: './src/code.ts',
  devtool: 'inline-source-map',
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/
      }
    ]
  },
  resolve: {
    extensions: [ '.ts', '.js', '.tsx' ]
  },
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist')
  }
};

tsconfig.json

{
  "compilerOptions": {
    "outDir": "./dist/",
    "noImplicitAny": true,
    "module": "es6",
    "moduleResolution": "node",
    "sourceMap": true,
    "target": "es6",
    "typeRoots": [
      "node_modules/@types"
    ],
    "lib": [
      "es2017",
      "dom"
    ]
  }
}