The command “view source https www facebook com” is a window into how modern, large-scale web applications are built. It teaches a crucial lesson: What You Will Not Find When you view Facebook’s source, you will not find your personal data. You will not see your friends’ names, your News Feed posts, or your chat history. This is the first important takeaway. The raw source code served from https://www.facebook.com is identical for every user on Earth. It is a generic shell—a container.
If you have ever right-clicked on a blank area of Facebook’s homepage and selected “View Page Source” (or pressed Ctrl+U ), you were met with a dense, nearly unreadable wall of text. For a new web developer or a curious user, this experience is often disappointing. Instead of finding neatly organized HTML with familiar tags like <div class="profile-name"> , you find minified JavaScript, obfuscated variable names, and a surprisingly small amount of visible HTML. view source https www facebook com