Day 15 | Web Dev 365
Anmoldeep Singh A.
Senior SDE at Persistent Systems with expertise in Salesforce (5x Certified) and Python
Web Dev 365
Day 15
Topic: Asynchronous JavaScript with Promises
One Liner Intro: Dive into asynchronous programming in JavaScript using Promises to handle operations that may take time to complete.
Purpose: Asynchronous JavaScript enables web developers to perform non-blocking operations such as fetching data from servers, handling user interactions, and executing time-consuming tasks without freezing the browser's UI. Promises provide a clean and elegant way to manage asynchronous code flow and handle success or failure scenarios.
Code Sample:
// Example of using Promises to fetch data asynchronously
function fetchData(url) {
return new Promise((resolve, reject) => {
fetch(url)
.then(response => {
if (!response.ok) {
throw new Error('Network response was not ok');
}
return response.json();
})
.then(data => resolve(data))
.catch(error => reject(error));
});
}
// Usage
fetchData('https://api.example.com/data')
.then(data => {
// Process fetched data
console.log(data);
})
.catch(error => {
console.error('Error fetching data:', error);
});
Personal Thoughts: Asynchronous programming is a dire need for many complex real world solutions to avoid deadlock crashes, and even assist recovery in fault encounters and exceptions. However the bigger challenge is to be one same page despite running a block in different time frame, thanks to promises it is so easy, specially compared to multi threading in languages like Java.
This allows asynchornous programming to be accessible right in the beginning of your development right away.
领英推荐
Read More at - https://javascript.plainenglish.io/promise-in-javascript-with-all-the-methods-b7357196a57e
Hope this helps!
See you in the next one,
Good vibes,
Anmoldeep (@eduanmoldeep)
Team Learner’s Den
Share with peers,
And join the WhatsApp conversation at