Hi 👋

In this video, we’ll explore what happens behind the scenes when we run HTML, CSS, and JavaScript code in the browser.
We’ll start by learning how the browser parses HTML and builds the DOM tree, and then understand how JavaScript is executed by the browser’s JS Engine.

You’ll also learn:

How the HTML Parser creates the DOM (Document Object Model)
What the Document Object is and how we can use it in JavaScript
How the Browser Runtime Environment works (Web APIs, Event Loop, Callback Queue)
What the JavaScript Engine does (like Chrome’s V8, Firefox’s SpiderMonkey)
Difference between Browser JS Engine and Node.js Runtime
What is ECMAScript (ES) Standard and how it defines JS behavior
How JavaScript engines follow ES rules to make code work the same everywhere

By the end, you’ll have a clear idea of how JavaScript runs inside the browser and Node.js, and how both follow ECMAScript standards.

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