How Does a Web Page Load and Execute: A Step-by-Step Guide?

Load and Execution Sequence of a Web Page

Understanding the Load Process

When a web page loads, several events occur in a specific sequence:

1. HTML Download and Parsing: The browser starts by fetching and parsing the HTML document. As the HTML is parsed, the browser creates the Document Object Model (DOM), which represents the structure of the page.
2. External Resource Loading: While parsing the HTML, the browser encounters external resources such as CSS and JavaScript files. These resources are downloaded in parallel, starting with those that appear earlier in the document.
3. Blocking and Asynchronous Loading: If a