Does jQuery have any "find or fail loudly" methods? -

consider following jquery code:

$('.child').closest('.parent').find('.sibling').hide(); 

at every step, if nothing found, jquery fail silently (for example, if there no .parent).

sometimes makes sense, means code nothing , have troubleshoot why. i'd option like:

$('.child').closest!('.parent')... 

meaning "fail loudly if don't find this". (bonus if enabled when developing.)

is there in jquery?

there's none, make easily:

object.keys($.fn).foreach(function(k){   var f = $.fn[k];   if (typeof f !=='function') return;   $.fn['_'+k] = function(){     var o = f.apply(this, arguments);     if (o && 'length' in o && !o.length) throw "loud";     return o;   } })  $("body")._find("unexisting"); // throws loud 

alternatively, replace existing functions when in debug mode:

if (debug_mode) {     // let's more cautious explicit list time     ['find','closest]'].foreach(function(k){       var f = $.fn[k];        $.fn[k] = function(){         var o = f.apply(this, arguments);         if (o && 'length' in o && !o.length) {           throw "loud"; // shall make more interesting error         }           return o;       };     }); } 

possibilities endless jquery prototype exposed.

now...the fact jquery doesn't fail on empty collections useful. of course can decide integrate code debug/dev session.