although the current mainstream of learning does not deal with these compatibility issues, this is something we can"t ignore in front-end development.
you can"t just caniuse with an attribute, can you?
so, wouldn"t it be convenient to have such an editor to accurately prompt attribute compatibility when using it?
(accurate prompt means that it can accurately provide compatibility prompts. When the attribute does not exist, whether there is an alternative such as xmlhttprequest / ActiveXObject)