JQuery 2.1.4 version of source code analysis

JQuery 2.1.4 version of source code analysis

Source code Analysis of acquisition elements in jquery

Jquery.each ({
Gets the parent element of the current element:function(elem) {varParent =Elem.parentnode;
The node type of NodeType 11 is documentfragmentreturnParent && Parent.nodetype!== 11? Parent:NULL; },
Get all parent nodes This involves the Dir method parents:function(elem) {returnJquery.dir (Elem, "ParentNode"); }, Parentsuntil:function(Elem, I, until) {returnJquery.dir (Elem, "ParentNode", until); }, Next:function(elem) {returnSibling (Elem, "nextSibling"); }, Prev:function(elem) {returnSibling (Elem, "previoussibling"); }, Nextall:function(elem) {returnJquery.dir (Elem, "nextSibling"); }, Prevall:function(elem) {returnJquery.dir (Elem, "previoussibling"); }, Nextuntil:function(Elem, I, until) {returnJquery.dir (Elem, "nextSibling", until); }, Prevuntil:function(Elem, I, until) {returnJquery.dir (Elem, "previoussibling", until); },
Return all sibling nodes siblings:function(elem) {returnJquery.sibling ((Elem.parentnode | |{}). FirstChild, Elem); }, Children:function(elem) {returnjquery.sibling (Elem.firstchild); },
Returns all the contents of a frame or all the child nodes of an element contents:function(elem) {returnelem.contentdocument | |Jquery.merge ([], elem.childnodes); }    }, function(name, FN) {Jquery.fn[name]=function(until, selector) {varmatched = Jquery.map ( This, FN, until); if(Name.slice ( -5)!== "Until") {Selector=until; }            if(Selector &&typeofselector = = = "string") {Matched=Jquery.filter (selector, matched); }            if( This. length > 1) {                //Remove Duplicates                if(!Guaranteedunique[name])                {Jquery.unique (matched); }                //Reverse order for parents* and Prev-derivatives                if(rparentsprev.test (name)) {matched.reverse (); }            }            return  This. Pushstack (matched);    }; });

Jquery.extend ({
Look for the parent until you find the end of until. Dir = parentnode dir According to the parents method:function(Elem, dir, until) {varmatched =[], truncate= until!==undefined; The condition to enter the loop is not the root node and the parent node is copied to Elem while((Elem = Elem[dir]) && Elem.nodetype!== 9) {                if(Elem.nodetype = = 1) {
Jump out of the loopif(Truncate &&jQuery (Elem). is (until)) {                         Break;                } matched.push (Elem); }            }            returnmatched; },//through the above source next method to know Elem = nextsiblilng sibling:function(n, elem) {varmatched = [];  for(; n; n =n.nextsibling) {if(N.nodetype = = = 1 && n!==elem)                {Matched.push (n); }            }            returnmatched; }    });

Let's talk about the difference between nextSibling and nextelementsibling.

NextSibling: Sibling node After returning element (contains comment text)

Nextelementsibling: Sibling node After returning element does not include comment and text and his property is read only

Jquery.noconflict Source Code Analysis

var    //To mount jquery under a Windows object_jquery =Window.jquery,//mount the $ to Windows object_$ =window.$; When calling Jquery.noconfict deep ==false then the $ alias fails if Deep==true then Jquery's alias is invalidated Jquery.noconflict=function(deep) {if(window.$ = = =jQuery) {window.$= _$; }        if(Deep && window.jquery = = =jQuery) {Window.jquery=_jquery; }        returnJQuery;    }; //Expose jQuery and $ identifiers, even in AMD    //(#7102 #comment:10, https://github.com/jquery/jquery/pull/557)    //and CommonJS for browser emulators (#13566)    if(typeofNoglobal = = =strundefined) {Window.jquery= window.$ = JQuery;

2016-11-22 21:14:38

JQuery 2.1.4 version of source code analysis