jquery Digging Source--event binding

jquery version: 2.1.4

• Most commonly used event binding bind, called on.

1 function (types, data, fn) {2         return  This NULL , data, FN); 3     }

The corresponding unbind Unband, called off.

1 function (types, fn) {2         return  This NULL , FN); 3     }

• Only one binding is executed once, naked call on.

1 function (types, selector, data, fn) {2         return this. On (types, selector, data, FN, 1 ); 3     }

• Delegate delegate, call on

1 function (selector, types, data, fn) {2         return  This . On (types, selector, data, FN); 3     }

Undelegate Call off

1 function (selector, types, fn) {2         // (namespace) or (selector, types [, fn]) 3         return  This this. Off (types, selector | | "* *", FN); 4     }

• Finally uncover the veil of on.

Parameters:

• Types Event Type
• Selector is a child element in a delegate. (The one in the past seems to have no such parameter)
• Data parameter
• FN event handler function
• One is one bound

1Onfunction(types, selector, data, FN,/*INTERNAL*/One ) {2         varorigfn, type;3 4         //Types can be a map of Types/handlers5         if(typeoftypes = = = "Object" ) {6             //(Types-object, selector, data)7             if(typeofSelector!== "string" ) {8                 //(types-object, data)9data = Data | |selector;Tenselector =undefined; One             } A              for(Typeinchtypes) { -                  This. On (type, selector, data, types[type], one); -             } the             return  This; -         } -  -         if(Data = =NULL&& fn = =NULL ) { +             //(types, fn) -fn =selector; +data = Selector =undefined; A}Else if(fn = =NULL ) { at             if(typeofselector = = = "string" ) { -                 //(types, selector, fn) -fn =data; -data =undefined; -}Else { -                 //(types, data, FN) infn =data; -data =selector; toselector =undefined; +             } -         } the         if(fn = = =false ) { *fn =Returnfalse; $}Else if( !fn) {Panax Notoginseng             return  This; -         } the  +         if(One = = 1 ) { AORIGFN =fn; thefn =function(event) { +                 //Can Use an empty set, since event contains the info - jQuery (). Off (event); $                 returnOrigfn.apply ( This, arguments); $             }; -             //Use same GUID so caller can remove using ORIGFN -Fn.guid = Origfn.guid | | (Origfn.guid = jquery.guid++ ); the         } -         return  This. each (function() {WuyiJQuery.event.add ( This, types, FN, data, selector); the         }); -}

on

corresponding Unbind off

1Offfunction(types, selector, fn) {2         varhandleobj, type;3         if(Types && Types.preventdefault &&types.handleobj) {4             //(event) dispatched Jquery.event5Handleobj =types.handleobj;6 jQuery (types.delegatetarget). Off (7Handleobj.namespace? Handleobj.origtype + "." +HandleObj.namespace:handleObj.origType,8 Handleobj.selector,9 Handleobj.handlerTen             ); One             return  This; A         } -         if(typeoftypes = = = "Object" ) { -             //(Types-object [, selector]) the              for(Typeinchtypes) { -                  This. Off (type, selector, types[type]); -             } -             return  This; +         } -         if(Selector = = =false||typeofselector = = = "function" ) { +             //(types [, fn]) Afn =selector; atselector =undefined; -         } -         if(fn = = =false ) { -fn =Returnfalse; -         } -         return  This. each (function() { inJQuery.event.remove ( This, types, FN, selector); -         }); to},

off

jquery Digging Source--event binding