fallback for browsers that don't support the placeholder
attribute, e.g. IE < 10
submitHandler
.js-form-submit
default class name; required on form submit element, i.e.<button class="'js-form-submit">
complete
callback function
basic:
jQuery.placeholder();
extended:
jQuery.placeholder({
submitHandler: '.my-own-submit-selector',
complete: function() {
// stuff to run
}
});