Jquery lazyload with ajax

问题

I use lazyload() on my ecommerce website. lazyload() works great. I use this code to do that:

$(function(){
  $("img.lazy").lazyload({ 
  effect : "fadeIn"
          });
});

Also there are some filter like color, price etc. which is run an ajax and show new result. When new result come, lazyload() doesn't work. I know that I have to use lazyload() with live(), delegate() or on(). But I am a newbie on jquery and I couldn't do that. Can anyone help me please? My jquery version is 1.7.2 and we can use on().

回答1:

NOTE: At the time this answer was accepted, this worked. The lazy loading plugin changed and now it is broken. I cannot unaccept the answer nor can I delete it.

There is another Q&A that suggests handling it as part of the AJAX request responsible for inserting the additional DOM:

Binding image lazy loading to new images inserted after ajax request

However, this is how I would do it:

$(document).on('DOMNodeInserted', 'img.lazy', function() {
    $(this).lazyload({
        effect: 'fadeIn'
    });
});

Demo: jsfiddle

回答2:

Shortly, the best optimized way to do this is to call the lazyload in your ajax's success function:

$.ajax({
    url: "your url here",
    type: "Post",
    success: function(response){
        // handle your success callback here
        $("img.lazy").lazyload({ 
              effect : "fadeIn"
        });
    }
});

---

But if you want to centralize your call to the lazyload plugin, you have 2 options:

First: (not recommended due to performance hit)

$(document).on('DOMNodeInserted', '#container', function() {
    $("img.lazy").lazyload({
        effect: 'fadeIn'
    });
});

but note here the "#container", it is the container's selector where you will show your new loaded stuff, so the code above will listen inside this container for any newly added stuff to run the lazyload again on new images,

Second: (recommended)

Calling your custom lazyload by adding it to your JQuery:

$.fn.myLazyLoad = function() {
    this.lazyload({ 
          effect : "fadeIn"
    });
};

then, call it in all your AJAX requests:

$.ajax({
    url: "your url here",
    type: "Post",
    success: function(response){
        // handle your success callback here
        $("img.lazy").myLazyLoad();
    }
});

回答3:

Lazyload for images loaded after window load (e.g. AJAX) will not display any images before a scroll event. This is because it is internally hardcoded to trigger the initial update after the window load event. All the above answers, for now, are wrong.

回答4:

In addition to AbdelHady's answer you can lazy load new images on success as a callback or use when() this way:

   $.when(load_new_image()).done(function(i){

            if($('img.lazy').length){

                 $('img.lazy').lazyload({ 

                          effect:'fadeIn'

                 }).removeClass('lazy').addClass('lazyloaded');

            }

        });

        function load_new_image() {

            return $.ajax({
                url: "your url here",
                type: "Post",
                success: function(response){

                     //append new content
                    $('#container').append(response);

                }
            });
        }

NOTA BENE

回答5:

I have same problem, when using waypoints infinite scroll with lazy load image. (but not work on ajax content).

and I fixed that issue with this :

$("img.lazy").lazyload({
    effect : "fadeIn",
    event: "scrollstop",
    skip_invisible : true
}).removeClass('lazy');

$(document).bind('DOMNodeInserted', function(e) {
    $("img.lazy").lazyload({
        effect : "fadeIn",
        event: "scrollstop",
        skip_invisible : true
    }).removeClass('lazy');
});

I bind the lazy load configuration on DOMNodeInserted event.

回答6:

I use the code below and it worked:

$(document).on('ajaxStop', function() {
   $("img.lazy").lazyload({
        effect: 'fadeIn'
    });
});

回答7:

   $(document).ajaxStop(function() {$('.loading').removeClass('in');
    $("img.lazy").lazyload({
                effect: "fadeIn",
               container: $("#scrollable"),
               threshold: 100,
            })

      });

works for ajax images. but however, not showing the first image by default. the update is not triggered.

来源：https://stackoverflow.com/questions/13791740/jquery-lazyload-with-ajax