Question 1

What is module scope in JavaScript?

Accepted Answer

In ES modules, top-level variables are scoped to the module, not global. They are only accessible outside if explicitly exported. This prevents accidental global pollution.

Question 2

What is scope in JavaScript?

Accepted Answer

Scope is the set of rules that determines where variables are accessible. JavaScript has global scope, function scope, block scope, and module scope.

Question 3

What is the difference between function scope and block scope in JavaScript?

Accepted Answer

Function scope means a variable is visible throughout the function (var). Block scope means a variable is visible only within the nearest enclosing block (let and const). var ignores block boundaries; let and const respect them.

Question 4

Are let and const block-scoped in JavaScript?

Accepted Answer

Yes. let and const are block-scoped. They are only accessible within the nearest enclosing pair of braces. var is function-scoped and ignores block boundaries (except function bodies).

What is module scope in JavaScript?

More FAQs in What Is Scope in JavaScript?

Still have questions?

Want to upskill yourself?

Small steps. Big possibilities.

Our courses are taking a Coffee break, but your curiosity shouldn't. Stay engaged with namastedev linkedin, youtube, discord and other resources while you wait.