This article explains the design and functionality of the new Sanitizer API being integrated into browsers for HTML sanitization. It highlights how the API aims to prevent XSS vulnerabilities by eliminating the need for ambiguous parsing and ensuring context sensitivity during input processing.

The article discusses the setHTML() method of the Element interface, which provides a way to safely parse and sanitize HTML strings before inserting them into the DOM. This method removes any XSS-unsafe elements and attributes, making it a recommended replacement for Element.innerHTML when handling untrusted content. It also highlights the importance of using a sanitizer configuration to define allowed elements and attributes.