automatically attaches select2 to all selects with the js-select2 class. All data-* attributes are passed as options to select2, eg. <select class="js-select2" data-minimum-input-length="3"></select>

select2-autobind.js

// automatically attaches select2 to all selects with the js-select2 class
// All data-* attributes are passed as options to select2, eg. <select class="js-select2" data-minimum-input-length="3"></select>
// use the update event if you add new html (ajax etc.)
$(document).on("ready update", function (e) {
    var $target = $(e.target);
    $target.find("select.js-select2").each(function () {
        var $select = $(this);
        var options = $select.data();
        for (var key in options) {
            var option = options[key];
            // allow functions
            if (typeof option == "string" && option.substr(0, 11).toLowerCase() === "javascript:") {
                option = new Function(option.substr(11));
                option = $.proxy(option, this); // bind the original input
            }
            options[$.camelCase(key)] = option;
        }
        $select.select2(options);
    });
});