Introduction rapide au TypeScript

TypeScript = JavaScript + Types

• Installation du compilateur : tsc

npm init
# Global install
npm i -g typescript

# local install (need some edit to npm script)
npm i typescript

• Initialisation d’un projet TS

mkdir <project_folder>
cd <project_folder>
tsc --init

• compilation de fichier

touch file1.ts
tsc file1.ts [...file2.ts]

• Fichier de configuration : tsconfig.json L’essentiel du fichier de configuration: module, output, src, includes, etc.

• Déclaration de variable
  • type primitif (string, boolean, entier, null, undefined, symbol, bigInt)
  • inference
  • type non primitif (array, object, function, record)
• Interface

• Custom type (union

  , intersection &, optional, omit, pick)

ex:

class App {
	users = [
		{
			id: "e32ab"
			name: "Ali",
			roles: ["admin", "manager"], // admin, manager, guest
			active: true,
			sex: "M", // M, F, O
		}
	]

	// TODO : methods to implements
	// add user
	// delete user
	// find user by id
	// add role
	// disable user
	// add role
	// remove role
}

⬅️ retour