Function assert

build-min/dependencies.js:47–48

(fn)

return cache;}
function markFunction(fn){fn[expando]=true;return fn;}
function assert(fn){var div=document.createElement("div");try{return!!fn(div);}catch(e){return false;}finally{if(div.parentNode){div.parentNode.removeChild(div);}
div=null;}}
function addHandle(attrs,handler){var arr=attrs.split("|"),i=attrs.length;while(i--){Expr.attrHandle[arr[i]]=handler;}}
function siblingCheck(a,b){var cur=b&&a,diff=cur&&a.nodeType===1&&b.nodeType===1&&(~b.sourceIndex||MAX_NEGATIVE)-
(~a.sourceIndex||MAX_NEGATIVE);if(diff){return diff;}