tsconfig.json Configuration Basics in Typescript - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is the purpose of the tsconfig.json file in a TypeScript project?

The tsconfig.json file tells the TypeScript compiler how to compile the project. It sets options like which files to include, where to put the output, and how strict the checks should be.

beginner

What does the compilerOptions section in tsconfig.json do?

The compilerOptions section sets rules and settings for the TypeScript compiler, like the target JavaScript version, module system, and whether to allow certain language features.

intermediate

What is the effect of setting "strict": true in tsconfig.json?

Setting "strict": true turns on all strict type-checking options. This helps catch more errors early by making TypeScript more careful about types.

beginner

How do you specify which files TypeScript should compile using tsconfig.json?

You can use the include and exclude arrays to tell TypeScript which files or folders to compile or ignore.

beginner

What does the outDir option do in tsconfig.json?

The outDir option tells TypeScript where to put the compiled JavaScript files after compiling.

What is the default file name for the TypeScript configuration file?

A tsconfig.json

B typescript.json

C config.json

D tsconfig.js

The TypeScript compiler looks for a file named tsconfig.json by default.

Which compilerOptions setting controls the JavaScript version output?

A module

B target

C outDir

D strict

The target option sets the JavaScript version (like ES5, ES6) that TypeScript will output.

How do you exclude files from compilation in tsconfig.json?

A Using the <code>skip</code> option

B Using the <code>ignore</code> array

C Using the <code>exclude</code> array

D Using the <code>remove</code> option

The exclude array lists files or folders that TypeScript should not compile.

What does setting "strict": true do?

A Enables all strict type checking options

B Disables all type checking

C Only checks for syntax errors

D Allows JavaScript files to be compiled

Setting "strict": true enables all strict type checking features to catch more errors.

Where does the outDir option send compiled files?

A To the root folder

B To the <code>src</code> folder

C To the <code>node_modules</code> folder

D To the folder specified by <code>outDir</code>

The outDir option specifies the folder where compiled JavaScript files are saved.

Explain the main purpose of the tsconfig.json file and name three common options you can set inside it.

Think about how TypeScript knows what to compile and how.

Describe what happens when you set "strict": true in your tsconfig.json and why it might be helpful.

Consider how strict type checking affects your code quality.