Namespace merging in Typescript - Mini Project: Build & Apply

Namespace Merging in TypeScript

📖 Scenario: Imagine you are organizing a small library system. You want to group related functions and variables under the same name to keep things tidy.

🎯 Goal: You will create two namespaces with the same name Library and merge them. Then you will use the merged namespace to access all the members.

📋 What You'll Learn

Create a namespace called Library with a variable books that holds the number 5

Create another namespace called Library with a function getBooks that returns the value of books

Use the merged Library namespace to call getBooks() and print the result

💡 Why This Matters

🌍 Real World

Namespace merging helps keep related code together, like grouping all library-related tools under one name.

💼 Career

Understanding namespaces and how to merge them is useful for organizing large TypeScript projects in professional software development.

1

Create the first namespace with a variable

Create a namespace called Library and inside it declare a variable books with the value 5.

Typescript

// Your code here

Need a hint?

Use namespace Library { export let books = 5; } to create the namespace and export the variable.

2

Create the second namespace with a function

Create another namespace called Library and inside it declare a function getBooks that returns books from the first namespace.

Typescript

namespace Library {
    // Your code here
}

Need a hint?

Remember to export the function and return the variable books inside it.

3

Use the merged namespace

Write a line of code that calls Library.getBooks() and stores the result in a variable called totalBooks.

Typescript

// Your code here

Need a hint?

Use let totalBooks = Library.getBooks(); to call the function and save the result.

4

Print the result

Write a line of code to print the value of totalBooks using console.log.

Typescript

// Your code here

Need a hint?

Use console.log(totalBooks); to show the number of books in the console.