Your search did not match any results.

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
Copy to CodeSandBox
<div class="long-title"> <h3>Personal details</h3> </div> <div id="form-container"> <dx-form id="form" [colCount]="2" [formData]="employee"> <dxi-item itemType="group"> <dxi-item itemType="group" caption="Personal Data"> <dxi-item dataField="FirstName"></dxi-item> <dxi-item dataField="LastName"></dxi-item> <dxi-item editorType="dxCheckBox" [editorOptions]="checkBoxOptions"></dxi-item> </dxi-item> <dxi-item itemType="group"> <dxi-item itemType="group" caption="Home Address" name="HomeAddress" [visible]="isHomeAddressVisible"> <dxi-item dataField="Address"></dxi-item> <dxi-item dataField="City"></dxi-item> </dxi-item> </dxi-item> </dxi-item> <dxi-item itemType="group" caption="Phones" name="phones-container"> <dxi-item itemType="group" name="phones" *ngFor="let phone of phoneOptions; let i = index"> <dxi-item [dataField]="'Phones[' + i + ']'" [editorOptions]="phoneOptions[i]"> <dxo-label [text]="'Phone ' + (i + 1)"> </dxo-label> </dxi-item> </dxi-item> <dxi-item itemType="button" horizontalAlignment="left" cssClass="add-phone-button" [buttonOptions]="addPhoneButtonOptions"> </dxi-item> </dxi-item> </dx-form> </div>
import { NgModule, Component, enableProdMode, AfterViewInit } from '@angular/core'; import { BrowserModule } from '@angular/platform-browser'; import { platformBrowserDynamic } from '@angular/platform-browser-dynamic'; import { DxFormModule } from 'devextreme-angular'; import { Employee, Service } from './app.service'; if (!/localhost/.test( { enableProdMode(); } @Component({ selector: 'demo-app', providers: [Service], templateUrl: 'app/app.component.html', styleUrls: ['app/app.component.css'] }) export class AppComponent implements AfterViewInit { employee: Employee; isHomeAddressVisible: boolean; checkBoxOptions: any; phoneOptions: any[] = []; addPhoneButtonOptions: any; constructor(service: Service) { this.employee = service.getEmployee(); this.isHomeAddressVisible = true; this.phoneOptions = this.getPhonesOptions(this.employee.Phones); this.checkBoxOptions = { text: "Show Address", value: true, onValueChanged: (e) => { this.isHomeAddressVisible = e.component.option("value"); } }; this.addPhoneButtonOptions = { icon: "add", text: "Add phone", onClick: () => { this.employee.Phones.push(""); this.phoneOptions = this.getPhonesOptions(this.employee.Phones); } }; } getPhonesOptions(phones: any) { let options = []; for (let i = 0; i < phones.length; i++){ options.push(this.generateNewPhoneOptions(i)); } return options; } generateNewPhoneOptions(index: number) { return { mask: "+1 (X00) 000-0000", maskRules: {"X": /[01-9]/}, buttons: [{ name: "trash", location: "after", options: { stylingMode: "text", icon: "trash", onClick: () => { this.employee.Phones.splice(index, 1); this.phoneOptions = this.getPhonesOptions(this.employee.Phones); } } }] } } } @NgModule({ imports: [ BrowserModule, DxFormModule ], declarations: [AppComponent], bootstrap: [AppComponent] }) export class AppModule { } platformBrowserDynamic().bootstrapModule(AppModule);
::ng-deep #form-container { margin: 10px 10px 30px; } ::ng-deep .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; } ::ng-deep .add-phone-button { margin-top: 10px; }
import { Injectable } from '@angular/core'; export class Employee { FirstName: string; LastName: string; Address: string; City: string; Phones: string[]; } let employee : Employee = { FirstName: "John", LastName: "Heart", Address: "351 S Hill St., Los Angeles, CA", City: 'Atlanta', Phones: ["8005552797", "8005953232"] }; @Injectable() export class Service { getEmployee() : Employee { return employee; } }
// In real applications, you should not transpile code in the browser. You can see how to create your own application with Angular and DevExtreme here: // window.config = { transpiler: 'ts', typescriptOptions: { module: "system", emitDecoratorMetadata: true, experimentalDecorators: true }, meta: { 'typescript': { "exports": "ts" }, 'devextreme/localization.js': { "esModule": true }, }, paths: { 'npm:': '' }, map: { 'ts': 'npm:plugin-typescript@8.0.0/lib/plugin.js', 'typescript': 'npm:typescript@3.5.3/lib/typescript.js', '@angular': 'npm:@angular', 'tslib': 'npm:tslib@2.3.1/tslib.js', 'rxjs': 'npm:rxjs@6.4.0', 'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js', 'luxon': 'npm:luxon@1.28.0/build/global/luxon.min.js', 'es6-object-assign': 'npm:es6-object-assign@1.1.0', 'devextreme': 'npm:devextreme@21.1.6/cjs', 'devextreme/bundles/dx.all': 'npm:devextreme@21.1.6/bundles/dx.all.js', 'jszip': 'npm:jszip@3.7.1/dist/jszip.min.js', 'devextreme-quill': 'npm:devextreme-quill@1.4.2/dist/dx-quill.min.js', 'devexpress-diagram': 'npm:devexpress-diagram@2.1.32', 'devexpress-gantt': 'npm:devexpress-gantt@3.0.14', 'devextreme-angular': 'npm:devextreme-angular@21.1.6', '@devextreme/vdom': 'npm:@devextreme/vdom@1.2.2', 'inferno': 'npm:inferno@7.4.10/dist/inferno.min.js', 'inferno-compat': 'npm:inferno-compat@7.4.10/dist/inferno-compat.min.js', 'inferno-create-element': 'npm:inferno-create-element@7.4.10/dist/inferno-create-element.min.js', 'inferno-dom': 'npm:inferno-dom@1.0.7/dist/inferno-dom.min.js', 'inferno-hydrate': 'npm:inferno-hydrate@7.4.10/dist/inferno-hydrate.min.js', 'inferno-clone-vnode': 'npm:inferno-clone-vnode@7.4.10/dist/inferno-clone-vnode.min.js', 'inferno-create-class': 'npm:inferno-create-class@7.4.10/dist/inferno-create-class.min.js', 'inferno-extras': 'npm:inferno-extras@7.4.10/dist/inferno-extras.min.js' }, packages: { 'app': { main: './app.component.ts', defaultExtension: 'ts' }, 'devextreme': { defaultExtension: 'js' }, '@devextreme/vdom': { 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:@angular/*/package.json", "npm:@angular/common/*/package.json", "npm:rxjs/package.json", "npm:rxjs/operators/package.json", "npm:devextreme-angular/*/package.json", "npm:devextreme-angular/ui/*/package.json", "npm:devextreme-angular/package.json", "npm:devexpress-diagram/package.json", "npm:devexpress-gantt/package.json", ] }; System.config(window.config);
<!DOCTYPE html> <html xmlns=""> <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=1.0" /> <link rel="stylesheet" type="text/css" href="" /> <link rel="stylesheet" type="text/css" href="" /> <script src=""></script> <script src=""></script> <script src=""></script> <script src=""></script> <script src="config.js"></script> <script> System.import('app').catch(console.error.bind(console)); </script> </head> <body class="dx-viewport"> <div class="demo-container"> <demo-app>Loading...</demo-app> </div> </body> </html>