onerror default image with 2.x

[onrclk]

onerror default image with 2.x

[brianwozeniak]

I am also really needing this feature to load a default image if the other images fail to load, still trying to figure out a solution here.

[brianwozeniak]

I have updated the code to be able to handle loading a default image on error:

https://github.com/brianwozeniak/jquery_lazyload/blob/2.x/lazyload.js

So for example:

<img src="default.jpg" data-src="imageToLoad.jpg" data-srcset="imageToLoad.jpg 1x, imageToLoadRetina.jpg 2x">

If the image in data-src or data-srcset fail to load, then it will change back to the default src value. It does this by creating a data-original attribute when trying to load the other images.

I also created a pull request to have this merged in. I also re-factored some duplicate code.