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How can I use jQuery to trigger a callback of a JavaScript function when I scroll down and see a picture? I wish to delay loading certain images until they actually appear on-screen... Ideally, I'd be able to do something like:
$('#img#').look_on() { ...
So no images are loaded apart from those I have seen.
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In addition to the onLoad() event handler, the Image object also supports two others. The onError() event handler is invoked when an error occurs during image loading, such as when the specified URL refers to a corrupt image data.
To handle the load event on images, you use the addEventListener() method of the image elements. You can assign an onload event handler directly using the onload attribute of the <img> element, like this: <img id="logo" src="logo.
Commonly Used jQuery Event Methods The click() method attaches an event handler function to an HTML element. The function is executed when the user clicks on the HTML element.
bind() method is used for attaching an event handler directly to elements. Handlers are attached to the currently selected elements in the jQuery object, so those elements must exist at the point the call to . bind() occurs.
I think this JQuery Event Plugin does what you need:
Element 'in view' Event Plugin
I've created an event that will trigger when the element is scrolled in to the viewport.
also, the LazyLoad Plugin seems to have a "viewport" selector for JQuqery: Here.
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Here is some kind like what i searched for... http://www.appelsiini.net/projects/lazyload
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