The Sanitizer API offers an easy to use and safe by default HTML Sanitizer API, which developers can use to remove content that may execute script from arbitrary, user-supplied HTML content. The goal is to make it easier to build XSS-free web applications. This follows previous attempts at establishing a Sanitizer API (https://chromestatus.com/feature/5786893650231296), which we unshipped again (https://chromestatus.com/feature/5115076981293056). The specification has meanwhile progressed and now has widespread support.
User input sanitization is a necessary and common activity of many web applications, but it's difficult to get right. As a component of the web platform it's easier to harden the sanitizer implementation and keep it up-to-date. Offering a high-quality sanitizer with good defaults (without blocking developers from using their own, if they choose) would improve security, and make it more accessible.
Samples: https://developer.mozilla.org/en-US/docs/Web/API/HTML_Sanitizer_API https://sanitizer-api.dev
Explainers: https://github.com/WICG/sanitizer-api/blob/main/explainer.md