Module scope in Javascript - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is module scope in JavaScript?

Module scope means variables and functions declared inside a module are only accessible within that module, not outside it.

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How do you create a module in JavaScript?

You create a module by saving code in a separate file and using import and export statements to share parts of it.

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What happens if you declare a variable inside a module without exporting it?

That variable stays private to the module and cannot be accessed from other modules.

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Why is module scope useful?

It helps keep code organized and avoids name conflicts by hiding variables and functions inside modules.

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How do you export a function from a module?

Use <code>export function myFunc() {}</code> or <code>export { myFunc }</code> to make it available outside the module.

What does module scope restrict?

A Access to variables and functions outside the module

B Access to global variables

C Access to browser APIs

D Access to CSS styles

Module scope restricts access to variables and functions declared inside the module from outside it.

Which keyword is used to share code from a module?

A import

B export

C var

D let

The export keyword shares code from a module so other modules can import it.

If a variable is not exported, can other modules use it?

A Only if declared with var

B Yes, always

C No, it stays private

D Only if imported

Variables not exported remain private to their module and cannot be accessed from outside.

How do you import a function named foo from a module?

A var foo = require('./module.js');

B export foo from './module.js';

C let foo = import('./module.js');

D import foo from './module.js';

Use import foo from './module.js'; to import the default exported function foo.

What is a benefit of module scope?

A It hides variables to avoid conflicts

B It slows down code

C It disables functions

D It makes all variables global

Module scope hides variables and functions inside modules to avoid name conflicts and keep code organized.

Explain what module scope is and why it is important in JavaScript.

Think about how modules keep code separate and private.

Describe how you share and use code between JavaScript modules.

Focus on how to make code available outside a module.