Load and Execution Sequence of a Web Page
Understanding the Load Process
When a web page loads, several events occur in a specific sequence:
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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.
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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.
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Blocking and Asynchronous Loading: If a
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