Module in JavaScript
Introduction
- Is a reusable piece of code
- Modules are building blocks of any complicated Software
- Module encapsulates implementation details
- Modules can be imported
- Modules can be exported
- Modules are imported synchronously
Example
- Create file index.html
- Create a file script.js
- Create a file auth.js
//index.html
<html>
<body>
<script type="module" defer src="./script.js"></script>
</body>
</html>
//script.js
import { checkAuth } from './auth.js'
let isValidUser = checkAuth(123);
console.log(isValidUser);
//auth.js
export const checkAuth = (userId) => {
let validUser = true;
return validUser;
}