JavaScript and APIs

Application Programming Interfaces (APIs) play a crucial role in modern web development, enabling seamless communication and data exchange between different applications. JavaScript, being a versatile and widely used programming language, provides robust methods to consume RESTful APIs effortlessly.

Example – Fetch API:

The Fetch API is built into modern browsers and allows developers to make HTTP requests and handle responses with ease.

// Fetching data from an API
fetch(‘https://api.example.com/data’)
.then(response => response.json())
.then(data => {
// Process the data
console.log(data);
})
.catch(error => {
// Handle errors
console.error(‘Error fetching data:’, error);
});

Securing API endpoints through authentication is crucial to prevent unauthorized access to sensitive data. Additionally, proper handling of API responses ensures a smooth user experience.

Example – Handling Authentication and API Responses:

// Sending an authenticated request
fetch(‘https://api.example.com/data’, {
method: ‘GET’,
headers: {
‘Authorization’: ‘Bearer YOUR_ACCESS_TOKEN’,
‘Content-Type’: ‘application/json’
}
})
.then(response => {
if (!response.ok) {
throw new Error(‘Network response was not ok’);
}
return response.json();
})
.then(data => {
// Process the data
console.log(data);
})
.catch(error => {
// Handle errors
console.error(‘Error fetching data:’, error);
});