Last Updated: 04 Jun 2024 06:24 by ADMIN
Release 2024 Q1

Bug report

In an Scheduler edit popup that has a required MultiSelect, the validation message disappears after blurring the widget.

Regression introduced with 2020 R2

Reproduction of the problem

  1. Open this Dojo example -
  2. Create or edit a task
  3. Remove the item in the MultiSelect and blur

Current behavior

The validation message disappears

Expected/desired behavior

The validation message should remain


  • Kendo UI version: 2022.2.621
  • Browser: [all]
Last Updated: 27 Sep 2023 12:21 by Les Baker
Created by: Les Baker
Comments: 0
Category: Validator
Type: Bug Report

Bug report

The default email regex of the Validator passes invalid email.


Reproduction of the problem

  1. Open this Dojo -
  2. Enter asd@asd
  3. Click the validate button

Current behavior

The validation passes.

Expected/desired behavior

The validation should fail.


  • Kendo UI version: 2023.2.829
  • Browser: [all]
Last Updated: 06 Jul 2022 13:31 by ADMIN


I seem to have unearthed a bug in the Kendo spreadsheet control. When the spreadsheet has only 1 row and there is column validation somewhere on the sheet, if I then edit a cell (without validation), 8 rows are created.

See the following Dojo

Kendo UI Snippet | Kendo UI Dojo (

Steps to reproduce.

1. Run the Dojo

2. Edit the UnitPrice cell to, say 20

3. Save changes

4. Observe in the browser console (F12) 8 rows created.

Expected results are 0 rows created and 1 updated




Last Updated: 22 Jun 2022 11:53 by Lauren
Created by: Lauren
Comments: 0
Category: Validator
Type: Feature Request
Add support for the formnovalidate attribute, so that when a submit button of a from is decorated with the attribute the Kendo Validator will not validate the form elements.
Last Updated: 08 Oct 2021 08:28 by ADMIN

Not so recently HTML 5 has added minLength and maxLength attributes (including form based validation) to their spec for input fields of the above mentioned types. Kendo UI Validator does not seem to use them during validation. It is, of course, possible to add a custom validation rule, however, it would be much preferred to use the built-in mechanism in modern browsers to do so.

Standard reference

HTML 5 standard maxLength and minLength


Demonstration code which does not fire a validation error:

<!DOCTYPE html>
    <meta charset="utf-8"/>
    <title>Kendo UI Snippet</title>

    <link rel="stylesheet" href=""/>

    <script src=""></script>
    <script src=""></script>
    <form class="myValidator">
      <p><input type="text" name="age" minlength="3"></p>
      <button id="validate" class="k-button k-primary" type="button">Validate</button>

        var validator = $(".myValidator").kendoValidator({
            minlength:"Number must be greater than 3"

Last Updated: 31 Mar 2021 13:38 by ADMIN
Created by: John
Comments: 2
Category: Validator
Type: Feature Request

If we make an input readonly it doesn't get validated and wee need it to be validated on a readonly datepicker.

In kend.all.min.js we have



and if i modify it by adding readonly like below



We need to make that code configurable because the workarounds concerining this problem it's buggy.

Last Updated: 24 Jan 2020 09:53 by ADMIN
Created by: Kevin
Comments: 1
Category: Validator
Type: Feature Request

Allow customization of the Validation Tooltip position.

For example, positioning the Tooltip based on the cell, on the input.