JavaScript Event: JQuery.event.remove Event explanation

We've already introduced JQuery.event.add, so let's take a look at jQuery.event.remove.

First on the code

　　

/*elem: Handled element types: Removed event handler: Removed method selector: element mappedtypes of the delegate:*/Remove:function(Elem, types, Handler, selector, mappedtypes) {varJ, Origcount, TMP, events, T, Handleobj, special, handlers, type, namespaces, Origtype,//get the data cache bound on the ElemElemdata = Data_priv.hasdata (elem) &&Data_priv.get (Elem); //no elemdata or elemdata.events, Exit function    if(!elemdata | |! (Events =elemdata.events)) {return; }    //handling Multi-event operations separated by spacesTypes = (Types | | ""). Match (core_rnotwhite) | | [""]; T=types.length;  while(t-- ) {        //TypeNamespace =/^ ([^.] *)(?:\. (.+)|) $/;TMP = Rtypenamespace.exec (types[t]) | | []; Type= Origtype = Tmp[1]; Namespaces= (Tmp[2] | | ""). Split (".")). sort (); //Remove all events under this element        if( !type) {             for(Typeinchevents) {JQuery.event.remove (elem, type+ types[T], handler, selector,true ); }            Continue; } Special= jquery.event.special[Type] | | {}; Type= (selector? special.delegateType:special.bindType) | |type; Handlers= events[Type] | | []; //If there is a namespace, get a regular with a namespaceTMP = tmp[2] &&NewRegExp ("(^|\\.)" + namespaces.join ("\ \ (?:. *\\.|)") + "(\\.| $)" ); Origcount= j =handlers.length;  while(j-- ) {            //get a handleobj under the handlersHandleobj =handlers[J]; if((mappedtypes | | origtype = = = Handleobj.origtype) &&                ( !handler | | Handler.guid = = = Handleobj.guid) &&                ( !tmp | | Tmp.test (handleobj.namespace)) &&                ( !selector | | selector = = = Handleobj.selector | | selector = = = "*" &&handleobj.selector)) {//remove the corresponding event object from the handlersHandlers.splice (J, 1 ); //Handling Delegatecount                if(handleobj.selector) {Handlers.delegatecount--; }                //If you have remove under Specia, call                if(special.remove) {Special.remove.call (Elem, handleobj); }            }        }        //Remove Generic event handler if we removed something and no more handlers exist        //(avoids potential for endless recursion during removal of special event handlers)        if(Origcount &&!)handlers.length) {if(!special.teardown | | special.teardown.call (elem, namespaces, elemdata.handle) = = =false) {jquery.removeevent (Elem, type, elemdata.handle); }            //Remove the Evens type            Deleteevents[type]; }    }    //Remove The expando if it ' s no longer used    if(Jquery.isemptyobject (events)) {DeleteElemdata.handle; Data_priv.remove (Elem,"Events" ); }},

JavaScript Event: JQuery.event.remove Event explanation