How to detect browser support for pageShow and pageHide?

Question

How can we do JavaScript object detection for pageShow and pageHide handlers?

if( /* pagehide is supported */ ){
   window.addEventListener('pagehide', exitFunction, false);
}
else{
    window.addEventListener('unload', exitFunction, false);
}

Answer 1

if ('onpagehide' in window) {
//if(window.onpagehide || window.onpagehide === null){
   window.addEventListener('pagehide', exitFunction, false);
} else {
   window.addEventListener('unload', exitFunction, false);
}