The extension for any TypeScript file is .ts. And any JavaScript file is a TypeScript file as it is a superset of JavaScript. So, once you change the extension of “.js” to “.ts”, your TypeScript file is ready. To compile any .ts file into .js use the following command :
tsc <TypeScript File Name>
For example, to compile “freetimelearn.ts”
tsc freetimelearn.ts
And the result would be freetimelearn.js
