50/50 Generator (Client Side)

// Website Link: https://5050.iserv.ml

const FFModule = (function() {

    var form = $('#gnrt-form'),
    firstLink = $('#link-1'),
    secondLink = $('#link-2'),
    resultInp = $('#link-3'),
    submitBtn = $('#btn-submit'),
    vanillaInp = resultInp.get(0),

    result = '',

    init = function() {
        form.submit(function(event) {
            event.preventDefault();
            var link1 = encodeURI(firstLink.val());
            var link2 = encodeURI(secondLink.val());

            if(link1.length === 0 || link2.length === 0) {
                resultInp.val('One of the links is invalid.');
                return false;
            }

            var long = link1 + ';' + link2;

            submitBtn.attr('disabled', true);

            $.post('shorten.php', {'url': long}).done(function(data) {
                data = JSON.parse(data);
                if(data.error) {
                    console.info('Error:', data.message || data.msg);
                    result = 'Error, please try again.';
                } else result = data.id;

                submitBtn.attr('disabled', false);
                resultInp.val(result);
            });

        });
    },

    cpy = function() {
        vanillaInp.select();
        document.execCommand("copy");
    };

    return {
        Initialize: init,
        Copy: cpy
    }

})();