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How to Compile TypeScript Code With tsc

TypeScript is a development tool geared towards making building JavaScript applications more robust. In an application's deployed state (browser or server), TypeScript must be compiled to valid JavaScript. In this lesson, we'll see how the TypeScript compiler provides us with a command to compile and produce JavaScript code from TypeScript.

Compiling our TypeScript project#

📝 This lesson's quiz can be found - here.
🗒️ Solutions for this lesson's quiz can be found - here.

Though our application is now suited for TypeScript development; to have our code be ready for production, it first must be built (i.e. compiled) as a JavaScript project. This is perfectly ok because TypeScript was only created to help developers during the development phase. Once the app is in production, known bugs should have all been fixed!

To achieve the compiling of our entire TypeScript project, we're going to create a new script in the package.json file which we'll call the build/ script.


build/ will be responsible in building (i.e. compiling) the TypeScript code in our project to valid JavaScript. We can achieve this compilation with the help of the tsc command the typescript package provides.

tsc takes an option labeled -p which is shorthand for --project that allows us to compile the TypeScript code in a project that contains a tsconfig.json file. The -p option requires an argument of the project directory. We'll use the tsc command in the build script of our application to compile our TypeScript project.

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