Synchronous vs Asynchronous
Synchronous vs Asynchronous
Section titled “Synchronous vs Asynchronous”Introduction
Section titled “Introduction”JavaScript is single-threaded — it can only execute one piece of code at a time. This topic covers the fundamental difference between synchronous (blocking) and asynchronous (non-blocking) execution.
Topics Covered
Section titled “Topics Covered”- Blocking vs Non-Blocking — How blocking differs from non-blocking execution
- Execution Model — How JavaScript handles sync and async under the hood
Learning Objectives
Section titled “Learning Objectives”- Understand the difference between synchronous and asynchronous execution
- Recognize blocking vs non-blocking operations
- Understand why async is essential for web applications
Prerequisites
Section titled “Prerequisites”- Basic JavaScript syntax
- Understanding of functions
Key Points
Section titled “Key Points”| Synchronous | Asynchronous |
|---|---|
| Blocks until complete | Non-blocking, continues execution |
| Sequential execution | Pending operations resume later |
| Simpler mental model | More complex but necessary for I/O |