Getting Started with the PopOver

This tutorial explains how to set up a basic Telerik UI for ASP.NET Core PopOver and highlights the key steps in the configuration of the component.

You will initialize a PopOver, add action buttons, and configure the handling of the PopOver's events. Finally, you can run the sample code in Telerik REPL and continue exploring the components.

Prerequisites

To successfully complete the tutorial, you need a project that is already configured to use the Telerik UI for ASP.NET Core components:

• You can use the Telerik REPL playground and skip installing the components on your system and configuring a project.

• You can prepare a Visual Studio project by following either of these guides:

  • Creating a new pre-configured project for the Telerik UI for ASP.NET Core components from a project template.

  • Manually configuring an existing project as described in the First Steps on Windows or First Steps on Mac articles.

1. Prepare the CSHTML File

The first step is to add the required directives at the top of the .cshtml document:

• To use the Telerik UI for ASP.NET Core HtmlHelpers:

  @using Kendo.Mvc.UI
  

• To use the Telerik UI for ASP.NET Core TagHelpers:

  @addTagHelper *, Kendo.Mvc
  

Optionally, you can structure the document by adding the desired HTML elements like headings, divs, paragraphs, and others.

2. Initialize the PopOver

Use the PopOver HtmlHelper or TagHelper to add the component to a page:

• The For() configuration method sets the target element.
• The Position() configuration specifies the overall position of the PopOver.
• The ShowOn() configuration specifies on which action it will be shown.
• The Body() configuration specifies the textual content that is rendered within the PopOver.

<div class="demo-section">
    <span id="buttonHover" class="k-button wider">Hover me!</span>
</div>

@(Html.Kendo().Popover()
    .For("#buttonHover")
    .Position(PopoverPosition.Bottom)
    .ShowOn(PopoverShowOn.MouseEnter)
    .Body("Hello!")
    .Width(100)
)

    @addTagHelper *, Kendo.Mvc

<div class="demo-section">
    <span id="buttonHover" class="k-button k-button-solid-primary k-button-solid k-button-md k-rounded-md wider">Hover me!</span>
</div>

<kendo-popover body="Hello!" toggle-on-click="true" width="100" position="bottom" for="#buttonHover">
    <animation enabled="true">
        <open duration="400"/>
        <close duration="400"/>
    </animation>
</kendo-popover>

3. Handle PopOver Events

The PopOver exposes events that you can handle to customize the component's functions. In this tutorial, you will:

• Use the Show() event to log a new entry in the browser's console whenever the PopOver is shown.
• Attach the Hide() event handler to log a new entry in the browser's console whenever the PopOver is hidden.

<div class="demo-section">
    <span id="buttonHover" class="k-button k-button-solid-primary k-button-solid k-button-md k-rounded-md wider">Hover me!</span>
</div>

@(Html.Kendo().Popover()
    .For("#buttonHover")
    .Position(PopoverPosition.Bottom)
    //.ShowOn(PopoverShowOn.MouseEnter)
    .ToggleOnClick(true)
    .Body("Hello!")
    .Width(100)
    .Events(events => events.Hide("onHide").Show("onShow"))
)

<script type="text/javascript">
        function onShow(e) {
            console.log("event :: show");
        }

        function onHide(e) {
            console.log("event :: hide");
        }
</script>

@addTagHelper *, Kendo.Mvc

<div class="demo-section">
    <span id="buttonHover" class="k-button k-button-solid-primary k-button-solid k-button-md k-rounded-md wider">Hover me!</span>
</div>

<kendo-popover body="Hello!" toggle-on-click="true" width="100" position="bottom" for="#buttonHover" on-hide="onHide" on-show="onShow">
    <animation enabled="true">
        <open duration="400"/>
        <close duration="400"/>
    </animation>
</kendo-popover>

<script type="text/javascript">
        function onShow(e) {
            console.log("event :: show");
        }

        function onHide(e) {
            console.log("event :: hide");
        }
</script>

6. (Optional) Reference Existing PopOver Instances

You can reference the PopOver instances that you have created and build on top of their existing configuration:

1. Use the id attribute of the component instance to establish a reference.

   <script>
       var popoverReference = $("#popover").data("kendoPopOver"); // popoverReference is a reference to the existing popover instance of the helper.
   </script>
   

2. Use the PopOver client-side API to control the behavior of the widget. In this example, you will use the show method to display the PopOver.

   <script>
       var popoverReference = $("#popover").data("kendoPopOver"); // popoverReference is a reference to the existing popover instance of the helper.
       popover.show(); // Displays the PopOver.
   </script>
   

Explore this Tutorial in REPL

You can continue experimenting with the code sample above by running it in the Telerik REPL server playground:

• Sample code with the PopOver HtmlHelper
• Sample code with the PopOver TagHelper

Next Steps

• Configure the templates in the PopOver

See Also

• Using the API of the PopOver for ASP.NET Core (Demo)
• PopOver Client-Side API
• Server-Side API of the PopOver
• Knowledge Base Section