How to use Fetch API to Get Data In Javascript
To Get data using the Fetch API in JavaScript, we use the fetch() function with the URL of the resource we want to fetch. By default, the fetch method makes the Get request.
Example: Get Data using Fetch API in JavaScript
The below examples show how to fetch data from a URL using JavaScript fetch API.
fetch('https://api.example.com/data')
.then(response => {
if (!response.ok) {
throw new Error('Network response was not ok');
}
return response.json();
})
.then(data => {
console.log('Data received:', data);
})
.catch(error => {
console.error('There was a problem with the fetch operation:', error);
});
Explanation:
- fetch() Function: Initiates an HTTP request to the specified URL (‘https://api.example.com/data’).
- Response Handling:
- .then(response => {…}): Handles the response received from the server.
- if (!response.ok) {…}: Checks if the response was successful (status code 200-299). If not, it throws an error.
- return response.json(): Parses the response body as JSON and returns it.
- Data Processing:
- .then(data => {…}): Handles the parsed JSON data received from the server.
- console.log(‘Data received:’, data): Logs the received data to the console.
- Error Handling:
- .catch(error => {…}): Catches any errors that occur during the fetch operation (e.g., network issues or failed requests).
- console.error(‘There was a problem with the fetch operation:’, error): Logs the error message to the console.
How to use JavaScript Fetch API to Get Data?
An API (Application Programming Interface) is a set of rules, protocols, and tools that allows different software applications to communicate with each other.
One of the popular ways to perform API requests in JavaScript is by using Fetch API. Fetch API can make GET and POST requests, JavaScript’s Fetch API is a powerful tool for developers seeking to retrieve this data efficiently. This guide focuses on using Fetch API to master the art of “GET” requests, the essential method for gathering information from APIs.
Table of Content
- What is the JavaScript Fetch API?
- How to Use the JavaScript Fetch API
- Using Fetch API to Get Data
- Making a Post request
- Error Handling