JavaScript Async Await Explained: Stop Using Promise Chaining! | QA Thoughts
Is your JavaScript code full of messy .then() blocks? Async and Await are the modern standard for handling asynchronous operations in JavaScript. They allow you to write code that looks synchronous (readable) but behaves asynchronously.
In this video, we convert complex "Promise Chaining" into clean async/await syntax. I use a practical example of "Opening Word and Excel" to demonstrate how to pause code execution until a task is finished—a critical skill for Test Automation (Playwright/Selenium).
Topics Covered in this Video:
00:00 - Introduction: Synchronous vs Asynchronous
00:30 - The async Keyword: Returning a Promise
00:45 - The await Keyword: Pausing execution
02:08 - Error Handling: Using try...catch blocks
02:33 - The problem with Promise Chaining & Callback Hell
07:52 - Real World Demo: Opening Word & Excel Applications
12:14 - Execution Flow: Watching the code "wait"
Why is this important for QA?
In automation, your script runs faster than the browser. You MUST use await to tell your script: "Wait for the button to appear before clicking." Without this, your tests will be flaky and fail.
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Must know JS topics before understanding async-await:
Promise in JS:
• JavaScript Promises Explained: .then(), .c...
Callback Hell in JS:
• What is Callback Hell in JavaScript? The "...
Callback function in JS:
• Callback Function In JavaScript | To handl...
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