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How can I override JQuery.show () and .hide () to fire events before and after?

I am trying to override the JQuery.show and .hide methods to trigger trigger events before and after they are called with the following code.

$(document).ready(function () {
    $('#dataBox').bind('afterShow', function () {
        alert('afterShow');
    });
    $('#dataBox').bind('afterHide', function () {
        alert('afterHide');
    });
    $('#dataBox').bind('beforeShow', function () {
        alert('beforeShow');
    });
    $('#dataBox').bind('beforeHide', function () {
        alert('beforeHide');
    });
    $('#toggleButton').click(function(){
        if($('#dataBox').is(':visible')) {
            $('#dataBox').hide ();
        } else {
            $('#dataBox').show();
        }
    });
});

jQuery(function ($) {
    var _oldShow = $.fn.show;
    //Override jquery 'show()' method to include two triggered events before and after
    $.fn.show = function (speed, oldCallback) {
        return $(this).each(function () {
            var obj = $(this),
                newCallback = function () {
                    if ($.isFunction(oldCallback)) {
                        oldCallback.apply(obj);
                }
                obj.trigger('afterShow');
            };
        obj.trigger('beforeShow');
            _oldShow.apply(obj, [speed, newCallback]);
        });
    }
});

jQuery(function ($) {
    var _oldHide = $.fn.hide;
    //Override jquery 'hide()' method to include two triggered events before and after
    $.fn.hide = function (speed, oldCallback) {
        return $(this).each(function () {
            var obj = $(this),
                newCallback = function () {
                    if ($.isFunction(oldCallback)) {
                        oldCallback.apply(obj);
                }
                obj.trigger('afterHide');
            };
        obj.trigger('beforeHide');
            _oldHide.apply(obj, [speed, newCallback]);
        });
    }
});

I have the following markup:

<input type='text' id='dataBox'/>
<input type='button' value='toggle' id='toggleButton' />

When I press the toggle button, the "beforeHide" and "beforeShow" events fire, but the "afterShow" and "afterHide" don't. Can someone tell me what I'm doing wrong?

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3 answers

plz check the demo script. hope it works

$. show / $. hide - override function:

(function($){
$.override ={'show': $.fn.show, 'hide': $.fn.hide};

$.each($.override,function(M,F){

        var m=M.replace( /^\w/, function(r){ return r.toUpperCase(); });

        $.fn[M] = function(speed, easing, callback) {

            var args=[speed||0,easing||'',callback||function(){}];

            if( $.isFunction(speed)){
                args[2]=speed;
                args[0]=0;
            }                   
            else if( $.isFunction(easing)){
                args[2]=easing;
                args[1]='';
            }                   

            if(!this.selector){
                F.apply(this, arguments);
                return this;
            }

            return this.each(function () {
                var obj = $(this),
                    oldCallback = args[args.length-1],
                    newCallback = function () {
                        if ($.isFunction(oldCallback)){
                            oldCallback.apply(obj);
                        }
                        obj.trigger('after'+m);
                };

                obj.trigger('before'+m);
                args[args.length-1]=newCallback;

                //alert(args);
                F.apply(obj,args);

            });
        }
});
})(jQuery);

Using

jQuery(function($){
var $dataBox=$('#dataBox').bind('beforeHide afterHide beforeShow afterShow', function(e) {
    alert(e.type);
});

$('#toggleButton').bind('click',function(){
    $dataBox[$dataBox.is(':visible')?'hide':'show'](100,'swing',function(){ alert('end of animation');});
    return false;
});
});
+6
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, newCallback . , , . jQuery doc $. Show, $.show no, one, two `

.show(duration [, callback])

durationA , , .

callbackA .

​​

: 1.4.3

.show([duration] [, easing] [, callback])

durationA , , .

easingA , , .

callbackA .

, . ,

 _oldHide.apply(obj, [speed, newCallback]);

speed undefined.

$.fn.show,

$(..).show(undefined,callBack)
//or
$(..).show(undefined,undefined, callBack)

, , jQuery 400ms / . fadeIn/fadeOut. show/hide

_oldShow/_oldHide

_oldShow.apply(obj, [0,newCallback]);

//or

_oldHide.apply(obj, [0,newCallback]);

, , , , $.show $.hide. ,

+3

afterShow afterHide

jQuery (newCallback ), show/hide . .show()/.hide() ( speed is undefined), jQuery / , .

.show()/.hide()

.eventedShow()/.eventedHide()

.eventedShow() .eventedHide() ( , .show()/.hide()), , :

(function( $ ) {

$.each( [ 'Show', 'Hide' ], function( i, method ) {
    $.fn[ 'evented' + method ] = function( speed ) {
        var originalMethod = method.toLowerCase(),
            hasCallback = false,
            args;

        // animate
        if ( speed || speed === 0 ) {
            args = $.makeArray( arguments );
            $.each( args, function( i, arg ) {
                if ( $.isFunction( arg ) ) {
                    args[ i ] = function() {
                        arg.apply( this, arguments );
                        $( this ).trigger( 'after' + method );
                    };
                    hasCallback = true;
                    return false;
                }
            } );
            if ( !hasCallback ) {
                args.push( function() {
                    $( this ).trigger( 'after' + method );
                } );
            }

            this.each( function() {
                var el = $( this );
                el.queue( function() {
                    $( this )
                        .trigger( 'before' + method )
                        .dequeue();
                } );
                $.fn[ originalMethod ].apply( el, args );
            } );

        // straight show/hide
        } else {
            this.trigger( 'before' + method );
            $.fn[ originalMethod ].apply( this, arguments );
            this.trigger( 'after' + method );
        }

        return this;
    };
} );

})( jQuery );

: http://jsfiddle.net/jefferyto/bv8D2/

show/hide eventedShow/eventedHide , .

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