DevExtreme v24.1 is now available.

Explore our newest features/capabilities and share your thoughts with us.

Your search did not match any results.


This demo shows how to validate Form editors. To apply validation rules to an editor, declare them in the validationRules array. Specify type and other properties for each rule.

Backend API
<template> <div id="form-demo"> <div class="widget-container"> <form action="your-action" @submit="handleSubmit" > <DxForm v-model:form-data="customer" :read-only="false" @initialized="saveFormInstance" @optionChanged="onOptionChanged" :show-colon-after-label="true" :show-validation-summary="true" validation-group="customerData" > <DxGroupItem caption="Credentials"> <DxSimpleItem data-field="Email" :editor-options="emailEditorOptions" > <DxRequiredRule message="Email is required"/> <DxEmailRule message="Email is invalid"/> <DxAsyncRule :validation-callback="asyncValidation" message="Email is already registered" /> </DxSimpleItem> <DxSimpleItem :editor-options="passwordEditorOptions" data-field="Password" > <DxRequiredRule message="Password is required"/> </DxSimpleItem> <DxSimpleItem name="ConfirmPassword" data-field="ConfirmPassword" :editor-options="confirmPasswordEditorOptions" editor-type="dxTextBox" > <DxLabel text="Confirm Password"/> <DxRequiredRule message="Confirm Password is required"/> <DxCompareRule :comparison-target="passwordComparison" message="Password and Confirm Password do not match" /> </DxSimpleItem> </DxGroupItem> <DxGroupItem caption="Personal Data"> <DxSimpleItem data-field="Name" :editor-options="nameEditorOptions" > <DxRequiredRule message="Name is required"/> <DxPatternRule :pattern="namePattern" message="Do not use digits in the Name" /> </DxSimpleItem> <DxSimpleItem :editor-options="dateBoxOptions" data-field="Date" editor-type="dxDateBox" > <DxLabel text="Date of birth"/> <DxRequiredRule message="Date of birth is required"/> <DxRangeRule :max="maxDate" message="You must be at least 21 years old" /> </DxSimpleItem> <DxSimpleItem :editor-options="dateRangeBoxOptions" data-field="VacationDates" editor-type="dxDateRangeBox" > <DxLabel text="Vacation Dates"/> <DxCustomRule :validation-callback="validateVacationDatesRange" message="The vacation period must not exceed 25 days" /> <DxCustomRule :validation-callback="validateVacationDatesPresence" message="Both start and end dates must be selected" /> </DxSimpleItem> </DxGroupItem> <DxGroupItem caption="Billing address"> <DxSimpleItem :editor-options="countryEditorOptions" data-field="Country" editor-type="dxSelectBox" > <DxRequiredRule message="Country is required"/> </DxSimpleItem> <DxSimpleItem :editor-options="cityEditorOptions" data-field="City" editor-type="dxAutocomplete" > <DxPatternRule :pattern="cityPattern" message="Do not use digits in the City name" /> <DxStringLengthRule :min="2" message="City must have at least 2 symbols" /> <DxRequiredRule message="City is required"/> </DxSimpleItem> <DxSimpleItem data-field="Address" :editor-options="addressEditorOptions" > <DxRequiredRule message="Address is required"/> </DxSimpleItem> <DxSimpleItem :editor-options="phoneEditorOptions" data-field="Phone" help-text="Enter the phone number in USA phone format" > <DxPatternRule :pattern="phonePattern" message="The phone must have a correct USA phone format" /> </DxSimpleItem> </DxGroupItem> <DxGroupItem css-class="last-group" :col-count-by-screen="colCountByScreen" > <DxSimpleItem :editor-options="checkBoxOptions" data-field="Accepted" editor-type="dxCheckBox" > <DxLabel :visible="false"/> <DxCompareRule :comparison-target="checkComparison" type="compare" message="You must agree to the Terms and Conditions" /> </DxSimpleItem> <DxGroupItem css-class="buttons-group" :col-count-by-screen="colCountByScreen" > <DxButtonItem :button-options="resetButtonOptions" name="Reset" /> <DxButtonItem :button-options="registerButtonOptions" /> </DxGroupItem> </DxGroupItem> </DxForm> </form> </div> </div> </template> <script setup lang="ts"> import { ref } from 'vue'; import DxForm, { DxGroupItem, DxSimpleItem, DxButtonItem, DxLabel, DxRequiredRule, DxCompareRule, DxRangeRule, DxStringLengthRule, DxPatternRule, DxEmailRule, DxAsyncRule, DxCustomRule, } from 'devextreme-vue/form'; // eslint-disable-next-line import DxAutocomplete from 'devextreme-vue/autocomplete'; // for editor-type=dxAutocomplete import 'devextreme-vue/date-range-box'; import notify from 'devextreme/ui/notify'; import Validator from 'devextreme/ui/validator'; import service from './data.ts'; const formInstance = ref(null); const customer = ref(service.getCustomer()); const registerButtonOptions = ref({ text: 'Register', type: 'default', width: '120px', useSubmitBehavior: true, }); const resetButtonOptions = ref({ icon: 'refresh', text: 'Reset', disabled: true, width: '120px', onClick: () => { formInstance.value.reset(); }, }); const colCountByScreen = ref({ xs: 2, sm: 2, md: 2, lg: 2, }); const passwordEditorOptions = ref({ mode: 'password', valueChangeEvent: 'keyup', onValueChanged: () => { const editor = formInstance.value.getEditor('ConfirmPassword'); if (editor.option('value')) { const instance = Validator.getInstance(editor.element()) as Validator; instance.validate(); } }, buttons: [ { name: 'password', location: 'after', options: { icon: 'eyeopen', stylingMode: 'text', onClick: () => changePasswordMode('Password'), }, }, ], }); const confirmPasswordEditorOptions = ref({ mode: 'password', valueChangeEvent: 'keyup', buttons: [ { name: 'password', location: 'after', options: { icon: 'eyeopen', stylingMode: 'text', onClick: () => changePasswordMode('ConfirmPassword'), }, }, ], }); const emailEditorOptions = ref({ valueChangeEvent: 'keyup', }); const nameEditorOptions = ref({ valueChangeEvent: 'keyup', }); const addressEditorOptions = ref({ valueChangeEvent: 'keyup', }); const dateBoxOptions = ref({ placeholder: 'Birth Date', acceptCustomValue: false, openOnFieldClick: true, }); const dateRangeBoxOptions = ref({ endDatePlaceholder: 'End Date', startDatePlaceholder: 'Start Date', acceptCustomValue: false, }); const checkBoxOptions = ref({ text: 'I agree to the Terms and Conditions', width: 270, value: false, }); const phoneEditorOptions = ref({ mask: '+1 (X00) 000-0000', valueChangeEvent: 'keyup', maskRules: { X: /[02-9]/, }, maskInvalidMessage: 'The phone must have a correct USA phone format', }); const cityEditorOptions = ref({ dataSource: service.getCities(), valueChangeEvent: 'keyup', minSearchLength: 2, }); const countryEditorOptions = ref({ dataSource: service.getCountries(), }); const maxDate = ref(new Date().setFullYear(new Date().getFullYear() - 21)); const namePattern = ref(/^[^0-9]+$/); const cityPattern = ref(/^[^0-9]+$/); const phonePattern = ref(/^[02-9]\d{9}$/); function onOptionChanged(e) { if ( === 'isDirty') { const resetButton = formInstance.value.getButton('Reset'); resetButton.option('disabled', !e.value); } } function saveFormInstance(e) { formInstance.value = e.component; } function changePasswordMode(name) { const editor = formInstance.value.getEditor(name); editor.option( 'mode', editor.option('mode') === 'text' ? 'password' : 'text', ); } function passwordComparison() { return customer.value.Password; } function checkComparison() { return true; } function asyncValidation(params) { return sendRequest(params.value); } function validateVacationDatesRange({ value }) { const [startDate, endDate] = value; if (startDate === null || endDate === null) { return true; } const millisecondsPerDay = 24 * 60 * 60 * 1000; const daysDifference = Math.abs((endDate - startDate) / millisecondsPerDay); return daysDifference < 25; } function validateVacationDatesPresence({ value }) { const [startDate, endDate] = value; if (startDate === null && endDate === null) { return true; } return startDate !== null && endDate !== null; } function handleSubmit(e) { notify({ message: 'You have submitted the form', position: { my: 'center top', at: 'center top', }, }, 'success', 3000); e.preventDefault(); } const sendRequest = function(value) { const invalidEmail = ''; return new Promise((resolve) => { setTimeout(() => { resolve(value !== invalidEmail); }, 1000); }); }; </script> <style scoped> form { margin: 10px 10px 15px; } .last-group { margin-top: 30px; margin-bottom: 10px; } .last-group .dx-item-content { align-items: start; justify-content: center; } .last-group .dx-field-item { padding: 0 !important; } .buttons-group { display: flex; width: 100%; justify-content: end; } .buttons-group .dx-item-content { gap: 10px; } </style>
window.exports = window.exports || {}; window.config = { transpiler: 'plugin-babel', meta: { '*.vue': { loader: 'vue-loader', }, '*.ts': { loader: 'demo-ts-loader', }, '*.svg': { loader: 'svg-loader', }, 'devextreme/time_zone_utils.js': { 'esModule': true, }, 'devextreme/localization.js': { 'esModule': true, }, 'devextreme/viz/palette.js': { 'esModule': true, }, }, paths: { 'root:': '../../../../', 'npm:': '', }, map: { 'vue': 'npm:vue@3.2.47/dist/vue.esm-browser.js', 'vue-loader': 'npm:dx-systemjs-vue-browser@1.1.1/index.js', 'demo-ts-loader': 'root:utils/demo-ts-loader.js', 'svg-loader': 'root:utils/svg-loader.js', 'mitt': 'npm:mitt/dist/mitt.umd.js', 'rrule': 'npm:rrule@2.6.4/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.1/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@24.1.4/cjs', 'devextreme-vue': 'npm:devextreme-vue@24.1.4/cjs', 'jszip': 'npm:jszip@3.10.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.7.1/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.2.10/dist/dx-diagram.js', 'devexpress-gantt': 'npm:devexpress-gantt@4.1.56/dist/dx-gantt.js', '@devextreme/runtime': 'npm:@devextreme/runtime@3.0.13', 'inferno': 'npm:inferno@7.4.11/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.11/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.11/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras/dist/inferno-extras.min.js', 'plugin-babel': 'npm:systemjs-plugin-babel@0.0.25/plugin-babel.js', 'systemjs-babel-build': 'npm:systemjs-plugin-babel@0.0.25/systemjs-babel-browser.js', // Prettier 'prettier/standalone': 'npm:prettier@2.8.8/standalone.js', 'prettier/parser-html': 'npm:prettier@2.8.8/parser-html.js', }, packages: { 'devextreme-vue': { main: 'index.js', }, 'devextreme': { defaultExtension: 'js', }, 'devextreme/events/utils': { main: 'index', }, 'devextreme/events': { main: 'index', }, 'es6-object-assign': { main: './index.js', defaultExtension: 'js', }, }, packageConfigPaths: [ 'npm:@devextreme/*/package.json', 'npm:@devextreme/runtime@3.0.13/inferno/package.json', ], babelOptions: { sourceMaps: false, stage0: true, }, }; System.config(window.config);
const customer = { Email: '', Password: '', Name: 'Peter', Date: null, VacationDates: [null, null], Country: '', City: null, Address: '', Phone: '', Accepted: false, }; const countries = [ 'Afghanistan', 'Albania', 'Algeria', 'Andorra', 'Angola', 'Antigua and Barbuda', 'Argentina', 'Armenia', 'Australia', 'Austria', 'Azerbaijan', 'The Bahamas', 'Bahrain', 'Bangladesh', 'Barbados', 'Belarus', 'Belgium', 'Belize', 'Benin', 'Bhutan', 'Bolivia', 'Bosnia and Herzegovina', 'Botswana', 'Brazil', 'Brunei', 'Bulgaria', 'Burkina Faso', 'Burma', 'Burundi', 'Cambodia', 'Cameroon', 'Canada', 'Cape Verde', 'Central African Republic', 'Chad', 'Chile', 'China', 'Colombia', 'Comoros', 'Democratic Republic of the Congo', 'Republic of the Congo', 'Costa Rica', 'Ivory Coast', 'Croatia', 'Cuba', 'Cyprus', 'Czech Republic', 'Denmark', 'Djibouti', 'Dominica', 'Dominican Republic', 'East Timor', 'Ecuador', 'Egypt', 'El Salvador', 'Equatorial Guinea', 'Eritrea', 'Estonia', 'Ethiopia', 'Fiji', 'Finland', 'France', 'Gabon', 'The Gambia', 'Georgia', 'Germany', 'Ghana', 'Greece', 'Grenada', 'Guatemala', 'Guinea', 'Guinea-Bissau', 'Guyana', 'Haiti', 'Honduras', 'Hungary', 'Iceland', 'India', 'Indonesia', 'Iran', 'Iraq', 'Republic of Ireland', 'Israel', 'Italy', 'Jamaica', 'Japan', 'Jordan', 'Kazakhstan', 'Kenya', 'Kiribati', 'North Korea', 'South Korea', 'Kuwait', 'Kyrgyzstan', 'Laos', 'Latvia', 'Lebanon', 'Lesotho', 'Liberia', 'Libya', 'Liechtenstein', 'Lithuania', 'Luxembourg', 'Republic of Macedonia', 'Madagascar', 'Malawi', 'Malaysia', 'Maldives', 'Mali', 'Malta', 'Marshall Islands', 'Mauritania', 'Mauritius', 'Mexico', 'Federated States of Micronesia', 'Moldova', 'Monaco', 'Mongolia', 'Montenegro', 'Morocco', 'Mozambique', 'Namibia', 'Nauru', 'Nepal', 'Kingdom of the Netherlands', 'New Zealand', 'Nicaragua', 'Niger', 'Nigeria', 'Norway', 'Oman', 'Pakistan', 'Palau', 'State of Palestine', 'Panama', 'Papua New Guinea', 'Paraguay', 'Peru', 'Philippines', 'Poland', 'Portugal', 'Qatar', 'Romania', 'Russia', 'Rwanda', 'Saint Kitts and Nevis', 'Saint Lucia', 'Saint Vincent and the Grenadines', 'Samoa', 'San Marino', 'São Tomé and Príncipe', 'Saudi Arabia', 'Senegal', 'Serbia', 'Seychelles', 'Sierra Leone', 'Singapore', 'Slovakia', 'Slovenia', 'Solomon Islands', 'Somalia', 'South Africa', 'South Sudan', 'Spain', 'Sri Lanka', 'Sudan', 'Suriname', 'Swaziland', 'Sweden', 'Switzerland', 'Syria', 'Tajikistan', 'Tanzania', 'Thailand', 'Togo', 'Tonga', 'Trinidad and Tobago', 'Tunisia', 'Turkey', 'Turkmenistan', 'Tuvalu', 'Uganda', 'Ukraine', 'United Arab Emirates', 'United Kingdom', 'United States', 'Uruguay', 'Uzbekistan', 'Vanuatu', 'Vatican City', 'Venezuela', 'Vietnam', 'Yemen', 'Zambia', 'Zimbabwe']; const cities = [ 'New York', 'Los Angeles', 'Chicago', 'Houston', 'Philadelphia', 'Phoenix', 'San Antonio', 'San Diego', 'Dallas', 'San Jose', 'Austin', 'Indianapolis', 'Jacksonville', 'San Francisco', 'Columbus', 'Charlotte', 'Fort Worth', 'Detroit', 'El Paso', 'Memphis', 'Seattle', 'Denver', 'Washington', 'Boston', 'Nashville', 'Baltimore', 'Oklahoma City', 'Louisville', 'Portland', 'Las Vegas', 'Milwaukee', 'Albuquerque', 'Tucson', 'Fresno', 'Sacramento', 'Long Beach', 'Kansas City', 'Mesa', 'Virginia Beach', 'Atlanta', 'Colorado Springs', 'Omaha', 'Raleigh', 'Miami', 'Oakland', 'Minneapolis', 'Tulsa', 'Cleveland', 'Wichita', 'Arlington', 'New Orleans', 'Bakersfield', 'Tampa', 'Honolulu', 'Aurora', 'Anaheim', 'Santa Ana', 'St. Louis', 'Riverside', 'Corpus Christi', 'Lexington', 'Pittsburgh', 'Anchorage', 'Stockton', 'Cincinnati', 'Saint Paul', 'Toledo', 'Greensboro', 'Newark', 'Plano', 'Henderson', 'Lincoln', 'Buffalo', 'Jersey City', 'Chula Vista', 'Fort Wayne', 'Orlando', 'St. Petersburg', 'Chandler', 'Laredo', 'Norfolk', 'Durham', 'Madison', 'Lubbock', 'Irvine', 'Winston–Salem', 'Glendale', 'Garland', 'Hialeah', 'Reno', 'Chesapeake', 'Gilbert', 'Baton Rouge', 'Irving', 'Scottsdale', 'North Las Vegas', 'Fremont', 'Boise', 'Richmond']; export default { getCustomer() { return customer; }, getCountries() { return countries; }, getCities() { return cities; }, };
import { createApp } from 'vue'; import App from './App.vue'; createApp(App).mount('#app');
<!DOCTYPE html> <html lang="en"> <head> <title>DevExtreme Demo</title> <meta http-equiv="X-UA-Compatible" content="IE=edge" /> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=5.0" /> <link rel="stylesheet" type="text/css" href="" /> <link rel="stylesheet" type="text/css" href="" /> <script src=""></script> <script type="module"> import * as vueCompilerSFC from ""; window.vueCompilerSFC = vueCompilerSFC; </script> <script src=""></script> <script src=""></script> <script type="text/javascript" src="config.js"></script> <script type="text/javascript"> System.import("./index.ts"); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> </body> </html>

The following validation rules are shown in this demo:

  • RequiredRule
    Requires that a validated editor has a value.

  • CompareRule
    Compares the editor's value to the specified expression.

  • PatternRule
    Checks whether an editor value matches a specified pattern.

  • RangeRule
    Checks whether an editor value is in a specified range.

  • StringLengthRule
    Requires that an editor value length is in a specified range.

  • EmailRule
    Requires that an editor value matches the Email pattern.

  • AsyncRule
    Allows you to add custom server-side validation logic. Rules of this type run last, only if all other rules passed. In this demo, an AsyncRule checks whether user input matches

  • CustomRule
    A rule with custom validation logic.

To submit form data, do the following:

  1. Wrap the Form component in the HTML <form> element.

  2. Use the Button Form Item to add a button to the form. This button submits the form data.

  3. Enable the button's useSubmitBehavior property.

When users click the button, the Form validates all editors that belong to the same validationGroup as this button. In this demo, all these editors belong to the customerData group. Form data can be submitted to a server only if input validation is successful. Enable the showValidationSummary property to display all validation errors at the bottom of the Form.

This demo also shows an implementation of the Reset button. When users click the button, it resets all Form data to initial values. The Form also uses the isDirty flag to check whether changes are made, and if not, disables the button.