Posted on Jul 21, 2024 • Edited on Mar 6

JavaScript map() method

#webdev #javascript #programming #learning

The map() method creates a new array populated with the results of calling a provided function on every element in the calling array.

Here's a simple map() example:

const numbers = [1, 2, 3, 4, 5]; const doubled = numbers.map(num => num * 2); console.log(doubled); // Output: [2, 4, 6, 8, 10]

Create a JSON File with Car Information and Display Using map()

First, create a JSON file named cars.json:

[ { "name": "Toyota Camry", "model": "2023", "image": "https://example.com/toyota_camry.jpg" }, { "name": "Honda Accord", "model": "2022", "image": "https://example.com/honda_accord.jpg" }, { "name": "Tesla Model 3", "model": "2024", "image": "https://example.com/tesla_model_3.jpg" } ]

create an HTML file index.html and use JavaScript to fetch and display the car information:

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Car Display</title> <style> .car { border: 1px solid #ddd; padding: 10px; margin: 10px; text-align: center; } .car img { width: 100px; height: auto; } </style> </head> <body> <h1>Car Information</h1> <div id="car-container"></div> <script> // Here we have Fetch the car data fetch('cars.json') .then(response => response.json()) .then(data => { const carContainer = document.getElementById('car-container'); carContainer.innerHTML = data.map(car => ` <div class="car"> <h2>${car.name}</h2> <p>Model: ${car.model}</p> <img src="${car.image}" alt="${car.name}"> </div> `).join(''); }) .catch(error => console.error('Error fetching the car data:', error)); </script> </body> </html>

Make sure to place the cars.json file in the same directory as your HTML file or adjust the fetch URL accordingly

Top comments (5)

Devam Chaudhari • Jul 22 '24

Great article on the map() method ! . I wanted to mention that you can also use destructuring assignment to access the name , model , image properties directly. This way , you don’t have to write cars each time , making the code cleaner and more readable. For example:

cars.map(({name, model, image}) => { });

or
cars.map((cars) => { const {name , model, image}= cars; return () });

Thank you for the insightful content!