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Form

Update Items Dynamically

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.

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$(function() { var form = $("#form").dxForm({ colCount: 2, 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) { form.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: [ addPhone(1), addPhone(2) ] }, { itemType: "button", horizontalAlignment: "left", cssClass: "add-phone-button", buttonOptions: { icon: "add", text: "Add phone", onClick: function() { var items = form.itemOption("phones-container.phones").items; items.push(addPhone()); form.itemOption("phones-container.phones", "items", items); } } } ] } ] }).dxForm("instance"); function addPhone(id) { id = id || new Date().getTime(); return { dataField: "Phone" + id, editorType: "dxTextBox", cssClass: "phone-editor", label: { text: "Phone" }, editorOptions: { mask: "+1 (X00) 000-0000", maskRules: {"X": /[01-9]/}, buttons: [{ name: "trash", location: "after", options: { stylingMode: "text", icon: "trash", onClick: function() { var items = form.itemOption("phones-container.phones").items, itemIndex = items.map(function(item) { return item.dataField; }).indexOf("Phone" + id); items.splice(itemIndex, 1); form.updateData("Phone" + id, undefined); form.itemOption("phones-container.phones", "items", items); } } }] } } } });
<!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/3.4.1/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/19.2.3/css/dx.common.css" /> <link rel="stylesheet" type="text/css" href="https://cdn3.devexpress.com/jslib/19.2.3/css/dx.light.css" /> <script src="https://cdn3.devexpress.com/jslib/19.2.3/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"> <div class="long-title"><h3>Personal details</h3></div> <div id="form-container"> <div id="form"></div> </div> </div> </body> </html>
#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; }
var employee = { "FirstName": "John", "LastName": "Heart", "Address": "351 S Hill St., Los Angeles, CA", "City": 'Atlanta', "Phone1": "8005552797", "Phone2": "8005953232" };