javascript - event.relatedTarget is null on focusout on touch screen -

i want use focusout on textarea, stash value of clicked button caused focusout, , click later, after processing. solution works on devices except iphone , ipads. can explain why event.relatedtarget null on touch screens? or browser? else there use?

i have tried e.currenttarget , document.activeelement (returns whole html body) trying settimeout around use of e.currenttarget. can't seem id of clicked button inside focusout, on ipads , iphones.

here's sample:

<div id="resultpage">   <textarea id="txtanswer0" class="txtanswer"></textarea>    <button id="gonow">     go   </button> </div>  $(document).ready(function() {     $("#resultpage").on("focusout", ".txtanswer:not(input[type=radio], input[type=checkbox])", function(e) {       var targetctrl = e.relatedtarget;       alert(targetctrl);   }); 

});

here fiddle:

https://jsfiddle.net/awebster28/6q6ok4re/25/

in research learned relatedtarget supposed on mouse events. if relatedtarget isn't null in non-mouse event browser isn't following standards.

you'll have temporarily store button, and/or button value in variable on click can used later second click.