Mastering import all as alias in JavaScript

Import all as Alias:

Write a JavaScript programme that imports all exports from a module as a single object and use its properties.

Solution-1:

JavaScript Code:

File: utilities.js

// --- file: utilities.js ---
// Export multiple utility functions
export function capitalize(str) {
  return str.charAt(0).toUpperCase() + str.slice(1);
}

export function reverse(str) {
  return str.split('').reverse().join('');
}

export function toLowerCase(str) {
  return str.toLowerCase();
}

File: app.js

// --- file: app.js ---
// Import all exports as an alias
import * as utils from './utilities.js';

// Use the imported properties
console.log(utils.capitalize('hello')); // Output: Hello
console.log(utils.reverse('world'));   // Output: dlrow
console.log(utils.toLowerCase('TEST')); // Output: test  

Output:

Hello
dlrow
test

Explanation:

• 'utilities.js' exports multiple functions.
• 'app.js' imports all functions as a single object using `import * as alias` syntax.
• The 'utils' alias groups all the exported functions, allowing them to be accessed as properties of the object.

Solution-2:

JavaScript Code:

File: mathUtils.js

// --- file: mathUtils.js ---
// Export mathematical utility functions
export const add = (a, b) => a + b;
export const subtract = (a, b) => a - b;
export const multiply = (a, b) => a * b;
export const divide = (a, b) => (b !== 0 ? a / b : 'Cannot divide by zero');

File: main.js

// --- file: main.js ---
// Import all exports as an alias
import * as math from './mathUtils.js';

// Use the imported properties
console.log(math.add(5, 3)); // Output: 8
console.log(math.subtract(5, 3)); // Output: 2
console.log(math.multiply(5, 3)); // Output: 15
console.log(math.divide(5, 0)); // Output: Cannot divide by zero

Output:

8
2
15
Cannot divide by zero

Explanation:

• 'mathUtils.js' exports several mathematical utility functions.
• 'main.js' imports all the functions as a single object using 'import * as alias' syntax.
• The 'math' alias encapsulates all the exported functions, which can be accessed as properties of the 'math' object.
• This approach makes it easy to organize and access related functions under one namespace.

For more Practice: Solve these Related Problems:

• Write a JavaScript program that imports all exports from a module as a single object and then calls a function from that object to display a message.
• Write a JavaScript program that imports all utilities from a helper module as an alias and uses one to format the current date.
• Write a JavaScript program that imports an entire module as an alias and then iterates over its properties to log the names of all available functions.
• Write a JavaScript program that imports all exports from a math module as an alias and then uses its properties to calculate the area of a circle.

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