Most JS events can be used as attributes. Usually not recommended; even in this case depending on the scale it may be better/cleaner to have a error handler listening for any image error.
If you're interested is event attributes, Mozilla has some nice documentation on it: developer.mozilla.org/en-US/docs/W...
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.