Not on my configuration, maybe it is done by default but I heavily modified my settings a long time ago, though in JS globals are valid, I get a lot of underlin

Not on my configuration, maybe it is done by default but I heavily modified my settings a long time ago, though in JS globals are valid, I get a lot of underlined for spelling, unused variables, possible uninitialized variables , I am trying to fix all the warnings but with JS dynamic ways I gave up, on PHP side I mostly fix all of them by defining the types in PHP Docs, handling all exceptions etc.