TextArea JSP Tag Overview
The TextArea JSP tag is a server-side wrapper for the Kendo UI TextArea widget.
The Kendo UI TextArea widget converts a <textarea> element into a styled textarea.
Getting Started
Configuration
The TextArea provides a set of default API configuration options that can be set during its initialization such as value, placeholder, and so on. Below are listed the steps for you to follow when configuring the Kendo UI TextArea.
Step 1 Make sure you followed all the steps from the introductory article on Telerik UI for JSP.
Step 2 Create a new action method which renders the view.
@RequestMapping(value = {"/", "/index"}, method = RequestMethod.GET)
public String index() {
return "textarea/index";
}
Step 3 Add the Kendo UI taglib mapping to the page.
<%@taglib prefix="kendo" uri="https://www.telerik.com/kendo-ui/jsp/tags"%>
Step 4 Add a TextArea tag.
<kendo:textArea name="description" rows="5" placeholder="Description..." style="width: 100%;"></kendo:textArea>
Labels
The Label enables you to associate a label HTML element with a TextArea.
The example below demonstrates how to add a floating label to a TextArea.
<kendo:textArea name="description" rows="5">
<kendo:textArea-label content="Description" floating="true"></kendo:textArea-label>
</kendo:textArea>
<style>
.k-floating-label-container {
width: 100%;
}
</style>
Event Handling
Subscribe to Events
You can subscribe to the change event by the handler name. The change fires each time a new value is set by the user. For a full list, refer to the TextArea events documentation in the API section.
Important: The
changeevent is not fired when the value of the widget is changed from JavaScript code.
<kendo:textArea rows="5" name="description" change="onChange" style="width: 100%;"></kendo:textArea>
<script>
function onChange() {
console.log("Change :: " + this.value());
}
</script>
Reference
Existing Instances
To reference to an existing TextArea instance, use the jQuery.data() method. Once a reference is established, use the API to control its behavior.
The following example demonstrates how to access an existing TextArea instance.
//Put this after your Kendo TextArea tag declaration
<script>
$(function() {
// Notice that the Name() of the TextArea is used to get its client-side instance
var textarea = $("#description").data("kendoTextArea");
});
</script>