javascript - Gracefully Handle Tel URL -

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i have link on website:

<a href="tel:0123456789">call me, maybe</a>

that's great browsers can initiate calls degrades elegance of hippopotamus. like:

<h1>the address wasn't understood</h1>

i thought of attaching on onclick listener , showing popup number. however, although listener runs, browser still follows url (and shows error) , i don't think there's reliable way detect whether there's tel: protocol handler.

is there solution this?

i think work see if device automatically wraps telephone number. 

<div id="testtel" style="display:none">+1 (111) 111-1111</div> var istelsupported = (function () {     var div = document.queryselector("#testtel"),         hasanchor = document.getelementsbytagname("a").length > 0;         div.parentnode.removechild(div);     return hasanchor; }()); alert(istelsupported);

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