Sanitizing HTML is essential to ensure user-generated content is safe from XSS vulnerabilities. The author introduces the new Sanitizer API designed for browsers, which simplifies HTML sanitization. Unlike existing methods, which often require multiple parsing steps and can introduce mXSS issues, the Sanitizer API focuses on a single, context-aware method: `Element.setHTML(input)`. This approach eliminates unnecessary parsing and reduces the risk of security flaws by ensuring that the HTML is processed in the correct context from the start. The traditional approach, exemplified by DOMPurify, involves parsing the HTML twice — once without context and once with it, which can lead to inconsistencies. The author highlights that both steps inadvertently contribute to potential XSS vulnerabilities. In contrast, the new API is designed to parse the input directly within the intended context and perform sanitization in one go. This means that developers can replace existing code using `innerHTML` with `setHTML`, maintaining functionality while ensuring better security. The development of this API was a collaborative effort, with contributions from several experts in the field. The article encourages further exploration of the Sanitizer API through resources like Firefox Nightly and MDN documentation, emphasizing its practical implications for web developers.