Lesson 5.5: Modules & Import/Export – Organizing Code
In modern JavaScript, modules allow you to split code into separate files for better organization, readability, and reusability. Using export and import, you can share functions, objects, or classes across files.
1. Why Use Modules?
-
Avoids large monolithic files.
-
Enables code reusability.
-
Improves maintenance and readability.
-
Supports scalable project structure.
2. Creating a Module
-
Any JavaScript file can be a module.
-
Use
exportto make functions, objects, or variables available to other files.
3. Importing a Module
-
Use
importto bring exported content into another file.
4. Default Exports
-
A module can have one default export.
5. Practical Uses
-
Separate utility functions, classes, or API calls into modules.
-
Use in large-scale projects for cleaner architecture.
-
Integrates seamlessly with build tools and frameworks.
✅ Summary:
-
Modules help organize code into reusable pieces.
-
Use export to share and import to use in another file.
-
Supports default and named exports.
-
Essential for maintaining clean and scalable JavaScript projects.
