How to run TypeScript files from command line?

I'm having a surprisingly hard time finding an answer to this. With plain Node.JS, you can run any js file with node path/to/file.js, with CoffeeScript it's coffee hello.coffee and ES6 has babel-node hello.js. How do I do the same with Typescript?

My project has a tsconfig.json which is used by Webpack/ts-loader to build a nice little bundle for the browser. I have a need for a build step run from the console before that, though, that would use some of the .ts files used in the project to generate a schema, but I can't seem to be able to run a single Typescript file without compiling the whole project.

How do I do the same with Typescript

You can leave tsc running in watch mode using tsc -w -p . and it will generate .js files for you in a live fashion, so you can run node foo.js like normal

TS Node

There is ts-node : https://github.com/TypeStrong/ts-node that will compile the code on the fly and run it through node 🌹

npx ts-node src/foo.ts

Run the below commands and install the required packages globally:

npm install -g ts-node typescript '@types/node'

Now run the following command to execute a typescript file:

ts-node typescript-file.ts

We have following steps:

1. First you need to install typescript

   npm install -g typescript
   

2. Create one file helloworld.ts

   function hello(person){
      return "Hello, " + person;
   }
   let user = "Aamod Tiwari";
   const result = hello(user);
   console.log("Result", result)
   

3. Open command prompt and type the following command

   tsc helloworld.ts
   

4. Again run the command

   node helloworld.js
   

5. Result will display on console

To add to @Aamod answer above, If you want to use one command line to compile and run your code, you can use the following:

Windows:

tsc main.ts | node main.js

Linux / macOS:

tsc main.ts && node main.js