Chainable?

[JamoCA]

Are you able to make the plugin "chainable" or add an event?

For example, I tried to add a class after calling letterpic and get a Cannot read property 'addClass' of undefined error.

$(".letterpic").letterpic().addClass('pointer');

Am I doing this wrong? I tried using deferred.then(), but it didn't work either.

My use case is: I'd like to identify elements that have a successfully loaded images (identified by an undefined "width" attribute) and add a click event to use MagnificPopUp to display a larger version of the image (or launch a upload tool, editor, crop-tool, etc.)

NOTE: I'll probably work around this by changing my trigger to use img.letterpic.

[yakovlevga]

Thanks for feedback.
I added chaining to plugin. Also I added two events, you can pass in options on plugin init:

$(".letterpic").letterpic({
    onElementReplaced: function($el, isBrokenImage) {
        console.log($el, isBrokenImage);
    },
    onImageError: function($el, url) {
        console.log('Image loading error: ' + url);
    }
}).addClass('pointer');