DevExtreme jQuery/JS - Customize Item Appearance

For a minor customization of SelectBox items, you can define specific fields in appointment data objects. For example, the following code generates three items: the first is not customized, the second is disabled and the third is hidden.

TypeScript
HTML
  • import { DxSelectBoxModule } from "devextreme-angular";
  • // ...
  • export class AppComponent {
  • products = [
  • { text: "HD Video Player" },
  • { text: "SuperHD Video Player", disabled: true },
  • { text: "SuperPlasma 50", visible: false }
  • ];
  • }
  • @NgModule({
  • imports: [
  • // ...
  • DxSelectBoxModule
  • ],
  • // ...
  • })
  • <dx-select-box
  • [dataSource]="products"
  • valueExpr="text"
  • displayExpr="text"
  • placeholder="Select a product...">
  • </dx-select-box>

If you need a more flexible solution, define a custom template for widget items. For AngularJS and Knockout apps, DevExtreme provides the dxTemplate markup component. The following code shows how to use dxTemplate to define a template for the SelectBox items.

HTML
TypeScript
  • <dx-select-box
  • [dataSource]="selectBoxData"
  • displayExpr="name"
  • valueExpr="id"
  • itemTemplate="item">
  • <div *dxTemplate="let data of 'item'">
  • <img src="{{data.imgSrc}}" />
  • <div style="display:inline-block">{{data.name}}</div>
  • </div>
  • </dx-select-box>
  • import { DxSelectBoxModule } from "devextreme-angular";
  • // ...
  • export class AppComponent {
  • selectBoxData = [{
  • id: 1,
  • name: "HD Video Player",
  • imgSrc: "images/products/1-small.png"
  • }, {
  • id: 2,
  • name: "UltraHD Player",
  • imgSrc: "images/products/2-small.png"
  • },
  • // ...
  • ];
  • }
  • @NgModule({
  • imports: [
  • // ...
  • DxSelectBoxModule
  • ],
  • // ...
  • })

If you use jQuery alone, use DOM manipulation methods to combine the HTML markup for items. To apply this markup, use the itemTemplate callback function as shown in the following code.

JavaScript
  • var selectBoxData = [{
  • id: 1,
  • name: "HD Video Player",
  • imgSrc: "images/products/1-small.png"
  • }, {
  • id: 2,
  • name: "UltraHD Player",
  • imgSrc: "images/products/2-small.png"
  • },
  • // . . .
  • ];
  •  
  • $(function() {
  • $("#selectBoxContainer").dxSelectBox({
  • dataSource: selectBoxData,
  • valueExpr: 'id',
  • displayExpr: 'name',
  • itemTemplate: function (itemData, itemIndex, itemElement) {
  • return $("<div />").append(
  • $("<img />").attr("src", itemData.imgSrc),
  • $("<p />").text(itemData.name)
  • .css("display", "inline-block")
  • );
  • }
  • });
  • });

You can also customize an individual SelectBox item. For this purpose, declare a template for this item as a script and pass its id to the template field.

HTML
JavaScript
  • <script id="individualTemplate" type="text/html">
  • <!-- ... -->
  • </script>
  • var selectBoxData = [
  • { text: "SuperHD Player"},
  • { text: "HD Video Player", template: $("#individualTemplate") },
  • // . . .
  • ];

Using similar techniques, you can customize the input field of the SelectBox. The template for it should be assigned to the fieldTemplate option. Note that the input field must contain the TextBox widget.

HTML
TypeScript
  • <dx-select-box
  • [dataSource]="selectBoxData"
  • valueExpr="id"
  • [value]="1"
  • displayExpr="name"
  • fieldTemplate="inputField">
  • <div *dxTemplate="let data of 'inputField'">
  • <img ng-src="{{data.imgSrc}}" />
  • <dx-text-box style="display:inline-block"
  • [value]="data.name"
  • ></dx-text-box>
  • </div>
  • </dx-select-box>
  • import { DxSelectBoxModule, DxTextBoxModule } from "devextreme-angular";
  • // ...
  • export class AppComponent {
  • selectBoxData = [
  • { id: 1, name: "HD Video Player", imgSrc: "images/products/1-small.png" },
  • // ...
  • ];
  • }
  • @NgModule({
  • imports: [
  • // ...
  • DxSelectBoxModule,
  • DxTextBoxModule
  • ],
  • // ...
  • })

In addition, you can use a 3rd-party template engine to perform the needed customizations. For more information, see the 3rd-Party Template Engines article.

See Also