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.
Feel free to share demo-related thoughts here.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
If you have technical questions, please create a support ticket in the DevExpress Support Center.
Thank you!
We appreciate your feedback.
We appreciate your feedback.
<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(document.location.host)) {
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:
// https://js.devexpress.com/Documentation/Guide/Angular_Components/Getting_Started/Create_a_DevExtreme_Application/
System.config({
transpiler: 'ts',
typescriptOptions: {
module: "system",
emitDecoratorMetadata: true,
experimentalDecorators: true
},
meta: {
'typescript': {
"exports": "ts"
},
'devextreme/localization.js': {
"esModule": true
}
},
paths: {
'npm:': 'https://unpkg.com/'
},
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@2.1.0/tslib.js',
'rxjs': 'npm:rxjs@6.4.0',
'rrule': 'npm:rrule@2.6.6/dist/es5/rrule.js',
'luxon': 'npm:luxon@1.26.0/build/global/luxon.min.js',
'es6-object-assign': 'npm:es6-object-assign@1.1.0',
'devextreme': 'npm:devextreme@20.2.6',
'jszip': 'npm:jszip@3.6.0/dist/jszip.min.js',
'devextreme-quill': 'npm:devextreme-quill@0.10.3/dist/dx-quill.min.js',
'devexpress-diagram': 'npm:devexpress-diagram@2.0.18',
'devexpress-gantt': 'npm:devexpress-gantt@2.0.24',
'devextreme-angular': 'npm:devextreme-angular@20.2.6',
'preact': 'npm:preact@10.5.13/dist/preact.js',
'preact/hooks': 'npm:preact@10.5.13/hooks/dist/hooks.js'
},
packages: {
'app': {
main: './app.component.ts',
defaultExtension: 'ts'
},
'devextreme': {
defaultExtension: 'js'
},
'devextreme/events/utils': {
main: 'index'
},
'devextreme/events': {
main: 'index'
},
'es6-object-assign': {
main: './index.js',
defaultExtension: 'js'
}
},
packageConfigPaths: [
"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",
]
});
<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<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="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.2.6/css/dx.light.css" />
<script src="https://unpkg.com/core-js@2.4.1/client/shim.min.js"></script>
<script src="https://unpkg.com/zone.js@0.10.2/dist/zone.js"></script>
<script src="https://unpkg.com/reflect-metadata@0.1.3/Reflect.js"></script>
<script src="https://unpkg.com/systemjs@0.21.3/dist/system.js"></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>