useEvent.returnValueto preventDefault and get the status whether the default has been prevented or not
use Event.cancelBubble = true to stop event stopPropagation
vanilla js
ie9 does not support the strict mode
<= ie9 do not suport XMLHttpRequest,but XDomainRequest,
however, <=ie9 do not support FormData,so you cannot send files with it
related: example ---- XDomainRequest object
IE
Event quirks of IE
[ ] make sure the specific versions
use
Event.returnValueto preventDefault and get the status whether the default has been prevented or notuse
Event.cancelBubble = trueto stop event stopPropagationvanilla js
XMLHttpRequest,butXDomainRequest, however, <=ie9 do not supportFormData,so you cannot send files with it related: example ---- XDomainRequest object