Vue Form - Customize Fields at Runtime

The Form component allows you to add/remove items and specify item visibility at runtime. The Form only updates the affected items and does not re-render the entire form.

In this demo, the "Show Address" checkbox specifies the visibility of address-related fields. Review the component's code to see how to set the "HomeAddress" group's visible attribute.

Click the "Add phone" button to add a new phone editor. This action adds a new item to the items array of the "phones" group. Each phone editor contains a button that deletes it from the items array and the Form.

Backend API

<template> <div> <div class="long-title"><h3>Personal details</h3></div> <div id="form-container"> <DxForm id="form" :col-count="2" :form-data="employee" > <DxGroupItem> <DxGroupItem caption="Personal Data"> <DxSimpleItem data-field="FirstName"/> <DxSimpleItem data-field="LastName"/> <DxSimpleItem :editor-options="checkBoxOptions" editor-type="dxCheckBox" /> </DxGroupItem> <DxGroupItem> <DxGroupItem :visible="isHomeAddressVisible" caption="Home Address" name="HomeAddress" > <DxSimpleItem data-field="Address"/> <DxSimpleItem data-field="City"/> </DxGroupItem> </DxGroupItem> </DxGroupItem> <DxGroupItem caption="Phones" name="phones-container" > <DxGroupItem item-type="group" name="phones" > <DxSimpleItem v-for="(phone, index) in phoneOptions" :key="'Phone' + (index + 1)" :data-field="'Phones[' + index + ']'" :editor-options="phone" > <DxLabel :text="'Phone ' + (index + 1)"/> </DxSimpleItem> </DxGroupItem> <DxButtonItem :button-options="addPhoneButtonOptions" css-class="add-phone-button" horizontal-alignment="left" /> </DxGroupItem> </DxForm> </div> </div> </template> <script setup lang="ts"> import { ref } from 'vue'; import { DxForm, DxSimpleItem, DxGroupItem, DxButtonItem, DxLabel, } from 'devextreme-vue/form'; import { type DxCheckBoxTypes } from 'devextreme-vue/check-box'; import service from './data.ts'; const employee = service.getEmployee(); const phoneOptions = ref(getPhonesOptions(employee.Phones)); const isHomeAddressVisible = ref(true); const checkBoxOptions = { text: 'Show Address', value: true, onValueChanged: (e: DxCheckBoxTypes.ValueChangedEvent) => { isHomeAddressVisible.value = !!e.component.option('value'); }, }; const addPhoneButtonOptions = { icon: 'add', text: 'Add phone', onClick: () => { employee.Phones.push(''); phoneOptions.value = getPhonesOptions(employee.Phones); }, }; function getPhonesOptions(phones: string[]) { const options = []; for (let i = 0; i < phones.length; i += 1) { options.push(generateNewPhoneOptions(i)); } return options; } function generateNewPhoneOptions(index: number) { return { mask: '(X00) 000-0000', maskRules: { X: /[01-9]/ }, buttons: [{ name: 'trash', location: 'after', options: { stylingMode: 'text', icon: 'trash', onClick: () => { employee.Phones.splice(index, 1); phoneOptions.value = getPhonesOptions(employee.Phones); }, }, }], }; } </script> <style> #form-container { margin: 10px 10px 30px; } .long-title h3 { font-family: 'Segoe UI Light', 'Helvetica Neue Light', 'Segoe UI', 'Helvetica Neue', 'Trebuchet MS', Verdana; font-weight: 200; font-size: 28px; text-align: center; margin-bottom: 20px; } .add-phone-button { margin-top: 10px; } </style>

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="https://cdn3.devexpress.com/jslib/26.1.5/css/dx.light.css" /> <link rel="stylesheet" type="text/css" href="https://maxcdn.bootstrapcdn.com/font-awesome/4.6.3/css/font-awesome.min.css" /> <link rel="stylesheet" type="text/css" href="./bundle.css" /> </head> <body class="dx-viewport"> <div class="demo-container"> <div id="app"> </div> </div> <script src="bundles/vendor/vue.vendor.js"></script> <script src="./bundle.js"></script> </body> </html>