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.
The article discusses essential HTML tags that are crucial for ensuring proper rendering and functionality in web browsers. It emphasizes the importance of including the `<!doctype html>`, `<html lang="en">`, `<meta charset="utf-8">`, and `<meta name="viewport" content="width=device-width,initial-scale=1.0">` tags to avoid common pitfalls and enhance the performance of websites across different devices and technologies. The author shares personal insights and examples to illustrate the impact of these tags on web development.