Science Knowings: JavaScript Course For Social Media

Asynchronous JavaScript

Event Delegation and Copywriting - Asynchronous JavaScript

Welcome back! Let's transition from event delegation and copywriting to the exciting world of asynchronous JavaScript.

What is Asynchronous Programming?

Asynchronous programming is a style of coding where operations can complete without blocking the main thread.

Benefits of Asynchronous Programming

  • Improved Performance
  • Increased Responsiveness
  • Better User Experience

Challenges of Asynchronous Programming

  • Complexity
  • Callback Hell
  • Concurrency Issues

Event Loop and Call Stack in JavaScript

Event Loop: Continuously monitors for events and executes callbacks in the order they occur.

Call Stack: Stores the current function executions, runs synchronously in FIFO order.

Callbacks and Promises

Callbacks: Functions passed as arguments to other functions, executed when a task is complete.

Promises: Object-based alternatives to callbacks, represent the eventual completion or failure of an asynchronous operation.

Async/Await in JavaScript (ES8)

Async/Await: Syntactic sugar for working with Promises, makes asynchronous code look synchronous.

async function fetchUserData() {
  const response = await fetch('api/user');
  const data = await response.json();
  return data;
}

setTimeout and setInterval: Scheduling Functions in JavaScript

setTimeout: Executes a function once after a specified delay in milliseconds.

setInterval: Executes a function repeatedly at a specified interval in milliseconds.

setTimeout and setInterval - Why Learn?

Useful for animations, delays, and scheduling tasks.

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