3. Typescript Journey - Hello World

Series Posts

Source Code

Run your app with Node

1. Create src folder

    mkdir src
    cd src
   

2. Create typescript file

    touch index.ts
   

3. Initialize tsc

    tsc --init
   

4. Output “Hello World” to console. Paste code into index.ts

    console.log("Hello World")
   

5. Create .js file from typescript

    tsc 
   

6. Run your app

    node index.js
   

7. Remove .js file

    rm index.js
   

Run your app with ts-node

Another alternative to run your app is to use ts-node, this does not require creating a js file

1. Install ts-node

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

2. Add ts-node to docker image so you don’t have to install everytime. In your dockerfile add the following line

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

3. Run your ts file

    ts-node index.ts
   

Next

4. Typescript Journey - Testing