define(['ko','jquery','underscore'],function(ko,$,_){'use strict';function isDomElement(node){return typeof node==='object'&&node.tagName&&node.nodeType;}
function normalize(nodes){var result;nodes=_.toArray(nodes);result=nodes.slice();nodes.forEach(function(node){if(node.nodeType===8){result=!ko.virtualElements.hasBindingValue(node)?_.without(result,node):_.difference(result,ko.virtualElements.childNodes(node));}});return result;}
$.fn.extendCtx=function(){var nodes=normalize(this),extenders=_.toArray(arguments);nodes.forEach(function(node){var ctx=ko.contextFor(node),data=[ctx].concat(extenders);_.extend.apply(_,data);});return this;};$.fn.applyBindings=function(ctx){var nodes=normalize(this),nodeCtx;if(isDomElement(ctx)){ctx=ko.contextFor(ctx);}
nodes.forEach(function(node){nodeCtx=ctx||ko.contextFor(node);ko.applyBindings(nodeCtx,node);});return this;};$.fn.bindings=function(data,ctx){var nodes=normalize(this),bindings=data,nodeCtx;if(isDomElement(ctx)){ctx=ko.contextFor(ctx);}
nodes.forEach(function(node){nodeCtx=ctx||ko.contextFor(node);if(_.isFunction(data)){bindings=data(nodeCtx,node);}
ko.applyBindingsToNode(node,bindings,nodeCtx);});return this;};});