document.addEventListener("DOMContentLoaded", function(event) {

    $('#submit-acceptance').click(function () {
        var data = {
            id: $('#request-id').attr('request-id'),
            _csrf: $('#csrf_token').val(),
            message: $('#text-input').val(),
        };
        $.ajax({
            url: '/acceptRequest',
            method: 'POST',
            data: data,
        }).done(function (data) {
            console.log(data)
        })
        $('#acceptModal').modal('hide')
        return false;
    });

    $('#acceptModal').on('show.bs.modal', function (event) {
        var button = $(event.relatedTarget) // Button that triggered the modal
        var id = button.data('id');
        var modal = $(this);
        modal.find('.modal-body #request-id').attr('request-id', id);
    });
});

@@ -446,16 +446,17 @@
 og(data)
+;
 %0A       

Add missing semicolon