SendFormWithFileInput.js

$("#checkFile").click(function(e){
    console.log("clicked");
    e.preventDefault();
    var batchRequestFile = $('#batchRequestFile').val()
    var jForm = new FormData();
    jForm.append("batchRequestFile", $('#batchRequestFile').get(0).files[0]);
    $.ajax({
        url: "customReminderSettings",
        type: "POST",
        data: jForm,
        mimeType: "multipart/form-data",
        contentType: false,
        cache: false,
        processData: false,
        success: function(data) {
            $("#tbexModalContent").html(data);
        }
    });
});