TypeScript - how to compile ts file to js

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In this short article, we would like to show how to compile *.ts files to *.js files.

To complile TypeScript file to JavaScript file, tsc program is necessary. In the below, you will find single output and multiple output compilation descriptions.

1. Single *.ts file compilation example

Simple steps:

  1. Create script.ts file:
    for (let i = 0; i < 5; ++i) {
        console.log('Hello world!');
  2. Run tsc command:
    tsc script.ts

    or for automatic compilation when script.ts file is changed use:

    tsc -w Script.ts


    • after compliation script.js file should be created,
    • -w parameter enables monitoring and recompilation when file is changed - files watching mode.
  3. Run compiled program
    node Script.js


    Hello world!
    Hello world!
    Hello world!
    Hello world!
    Hello world!

2. Multiple *.ts files to  single *.js file compilation example

Read this article for more details.


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