Too Long; Didn't Read
The question is... How to defend against attacks XSS? There's no formula - A system security is always dependent on that system context, keep this in mind, but there are practices against well-known XSS attacks. Start reading about Content Security Policy, Mozilla Observatory, OWASP recommendations, and signing up my newsletter. Additionally, start reading about content Security Policy and Mozilla Observatory recommendations. The author of this article, Dev.to, is a web security lover who talks about web security.