By viewing the page's HTML or source code, you can see how elements on the page are handled as well as paths to the page's images or audio features.

A step-by-step guide to understanding your webpage source code and how the search engines use it to determine how your site ranks in search results.

In previous versions of Microsoft Outlook (the classic app), you could view the HTML code of an email by opening the email, ...

Code commonly flows downstream, from an open-source project into an organization’s own products. Upstreaming is the process of reversing that flow—contributing code back to an open-source project.

The HTML is parsed, JavaScript is executed, and the result is the DOM. The content of a web page is not (just) source code, it’s the DOM. This makes it pretty important.