express starting template in typescript in javascript

To express a starting template in TypeScript, you can first create a new directory for your project and navigate to it in your terminal. Then, run npm init to create a new package.json file in your directory.

Next, you'll want to install the TypeScript compiler and some supporting modules. Run the following command:

index.tsx
npm install --save-dev typescript ts-loader webpack webpack-cli
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After that, create a new file called tsconfig.json in the root of your project directory. Here's a basic configuration you can start with:

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "strict": true,
    "esModuleInterop": true,
    "sourceMap": true
  },
  "include": ["src/**/*"]
}
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This configuration sets the compiler target to ES5, uses CommonJS modules, enables strict type checking, allows for interop with CommonJS modules, and generates source maps. It also specifies that the src directory should be included when compiling.

Create a new src directory and add a app.ts file to it. Here's an example app.ts file:

index.ts
function greeter(person: string) {
  return "Hello, " + person;
}

let user = "Jane User";

console.log(greeter(user));
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Now create a new webpack.config.js file in the root of your project directory. Here's an example configuration that will compile and bundle your TypeScript code using Webpack:

index.tsx
const path = require('path');

module.exports = {
  entry: './src/app.ts',
  module: {
    rules: [
      {
        test: /\.tsx?$/,
        use: 'ts-loader',
        exclude: /node_modules/
      }
    ]
  },
  resolve: {
    extensions: ['.tsx', '.ts', '.js']
  },
  output: {
    filename: 'bundle.js',
    path: path.resolve(__dirname, 'dist')
  }
};
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This configuration specifies that the entry point for your application is src/app.ts, that TypeScript files should be compiled using ts-loader, and that the output bundle should be saved to a dist directory.

Finally, add a start script to your package.json file:

index.tsx
{
  "name": "my-app",
  "version": "1.0.0",
  "scripts": {
    "start": "webpack --watch"
  }
}
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This script will start Webpack in watch mode and recompile your TypeScript code whenever you make changes. You can start your application by running npm start in your terminal.

That's it! You now have a basic starting template for a TypeScript project using Webpack.