Customize Fields at Runtime
The Form widget 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 widget'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.
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var DemoApp = angular.module('DemoApp', ['dx']);
DemoApp.controller('DemoController', function DemoController($scope) {
$scope.formOptions = {
colCount: 2,
onInitialized: function(e) {
formInstance = e.component;
},
formData: employee,
items: [
{
itemType: "group",
items: [
{
itemType: "group",
caption: "Personal Data",
items: ["FirstName", "LastName", {
itemType: "simple",
editorType: "dxCheckBox",
editorOptions: {
text: "Show Address",
value: true,
onValueChanged: function(e) {
formInstance.itemOption("HomeAddress", "visible", e.value);
}
}
}]
},
{
itemType: "group",
items: [{
itemType: "group",
name: "HomeAddress",
caption: "Home Address",
items: ["Address", "City"]
}]
}
]
},
{
itemType: "group",
caption: "Phones",
name: "phones-container",
items: [
{
itemType: "group",
name: "phones",
items: getPhonesOptions(employee.Phones)
},
{
itemType: "button",
horizontalAlignment: "left",
cssClass: "add-phone-button",
buttonOptions: {
icon: "add",
text: "Add phone",
onClick: function() {
employee.Phones.push("");
formInstance.itemOption("phones-container.phones", "items", getPhonesOptions(employee.Phones));
}
}
}
]
}
]
};
});
function getPhonesOptions(phones) {
var options = [];
for (var i = 0; i < phones.length; i++){
options.push(generateNewPhoneOptions(i));
}
return options;
}
function generateNewPhoneOptions(index) {
return {
dataField: "Phones[" + index + "]",
editorType: "dxTextBox",
cssClass: "phone-editor",
label: {
text: "Phone "+(index + 1)
},
editorOptions: {
mask: "+1 (X00) 000-0000",
maskRules: {"X": /[01-9]/},
buttons: [{
name: "trash",
location: "after",
options: {
stylingMode: "text",
icon: "trash",
onClick: function() {
employee.Phones.splice(index, 1);
formInstance.itemOption("phones-container.phones", "items", getPhonesOptions(employee.Phones));
}
}
}]
}
}
}
<!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" />
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script>window.jQuery || document.write(decodeURIComponent('%3Cscript src="js/jquery.min.js"%3E%3C/script%3E'))</script>
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.8/css/dx.common.css" />
<link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/20.1.8/css/dx.light.css" />
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.16/angular.min.js"></script>
<script>window.angular || document.write(decodeURIComponent('%3Cscript src="js/angular.min.js"%3E%3C\/script%3E'))</script>
<script src="https://cdn3.devexpress.com/jslib/20.1.8/js/dx.all.js"></script>
<script src="data.js"></script>
<link rel="stylesheet" type="text/css" href="styles.css" />
<script src="index.js"></script>
</head>
<body class="dx-viewport">
<div class="demo-container" ng-app="DemoApp" ng-controller="DemoController">
<div class="long-title"><h3>Personal details</h3></div>
<div id="form-container">
<div dx-form="formOptions"></div>
</div>
</div>
</body>
</html>
#form-container {
margin: 10px;
}
.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;
}
var employee = {
"FirstName": "John",
"LastName": "Heart",
"Address": "351 S Hill St., Los Angeles, CA",
"City": 'Atlanta',
"Phones": ["8005552797", "8005953232"]
};