Trusted Types
Trusted Types is a web platform security API designed to prevent DOM-based cross-site scripting (XSS) attacks by enforcing strict content security policies for dangerous DOM sinks. It allows developers to define trusted policies that sanitize or validate untrusted input before it can be assigned to sensitive DOM APIs, such as innerHTML or script.src. This helps mitigate one of the most common web vulnerabilities by shifting security to the browser's enforcement layer.
Developers should learn and use Trusted Types when building web applications that handle user-generated content or dynamic DOM manipulation, especially in security-critical environments like banking, healthcare, or e-commerce sites. It is essential for modern web security to prevent XSS attacks, which can lead to data theft, session hijacking, or malware injection. Use it in conjunction with Content Security Policy (CSP) to enforce these protections across entire applications.