Robuta

https://shazzer.co.uk/vectors/68fa0bc6b20bad559739a1ea
This XSS vector shows what characters can be used before the onerror event.
before aftercharactersallowedonerrorevents
https://www.w3schools.com/jsreF/event_onerror_media.asp
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML...
onerrorevent
https://shazzer.co.uk/vectors/660bd4332c407644dfd17e02
I want to know which characters the browser accepts between an event handler and a equal sign.
characterallowedonerrorevent