Beginner LevelHTML & Semantic Web
How do HTML comments work and why must sensitive information never be stored in them?
❓ Interview Prompt: Explain HTML comment syntax <!-- comment -->, client-side visibility in View Source, and security risks.
HTML comments use the '<!-- comment -->' syntax. Comments are ignored by the browser rendering engine and do not appear on the rendered page canvas.
Critical Security Warning:
HTML comments are transmitted in plain text to the client browser! Anyone can inspect them by using browser DevTools or 'View Source'. Never store API keys, passwords, database credentials, or internal backend notes inside HTML comments!
Code Implementation Example
html
<!-- Public layout comment explaining component -->
<section class="hero-banner">
<h2>Welcome to our Platform</h2>
</section>💡HTML comment syntax for public code documentation.
🎯 Interview Key Takeaway
HTML comments are visible to all users via View Source. Never store secrets or sensitive notes in comments.
#Comments#Security#View Source#Beginner
Back to all HTML & Semantic Web Questions→