https://csp-guide.com/tags/web-components/ Recent content in Web-Components on CSP Guide Hugo -- gohugo.io en-us Mon, 22 Jun 2026 00:00:00 +0000 https://csp-guide.com/posts/csp-and-web-components-shadow-dom-security-implications/ Mon, 22 Jun 2026 00:00:00 +0000 https://csp-guide.com/posts/csp-and-web-components-shadow-dom-security-implications/ <p>Content Security Policy and Web Components solve very different problems, but they collide in ways that matter a lot when you ship component-heavy frontend code.</p> <p>CSP is your browser-enforced damage control layer. Web Components are your encapsulation and reuse layer. Shadow DOM sits in the middle, and people routinely give it more security credit than it deserves.</p> <p>My blunt take: Shadow DOM is great for isolation of markup and styles. It is not a security boundary. CSP is a real security control. If you treat Shadow DOM like a sandbox, you will eventually ship an XSS bug with a false sense of safety.</p>