app/assets/javascripts/modules/bookmark.js
$(function(){
$("*[data-module='bookmark']").each(function(i, item){
var $el = $(item);
var $submitBtn = $el.find('input[type=submit]');
var $icon = $el.find('span.bookmark-icon');
$submitBtn.hide();
$icon.on('click', function(e){
e.preventDefault();
$submitBtn.click();
});
})
});