Accessing Flexmonster functionality through JavaScript

Some of Flexmonster's methods and events are not supported in Blazor out of the box (see the list of such methods and events). However, you can use JavaScript to access them.

Prerequisites

• A Blazor application with Flexmonster embedded into it.
  If Flexmonster is not yet embedded, see Integration with Blazor.

Access Flexmonster’s features through JavaScript

To demonstrate this approach, let’s customize the Toolbar using JavaScript:

Step 1. In your project, go to the wwwroot/index.html file and create an empty <script> section there:

<body>
  <app>Loading...</app>

  <script src="_framework/blazor.webassembly.js"></script>
  <script>
  </script>
</body>

This section will contain your JavaScript code for Flexmonster.

Step 2. Inside the window object, create a JavaScript function and pass a Flexmonster instance to it. This instance can be used to access the Flexmonster API. For example:

<body>
  <app>Loading...</app>
 
  <script src="_framework/blazor.webassembly.js"></script>
  <script>
    /* The window.customizeToolbar function subscribes
       Flexmonster to the beforetoolbarcreated event
    */
    window.customizeToolbar = (pivot) => {
      pivot.on("beforetoolbarcreated", customizeToolbarHandler);
    }
 
    function customizeToolbarHandler(toolbar) {
      // Get all tabs
      let tabs = toolbar.getTabs();
      toolbar.getTabs = function () {
        // Remove the Connect tab using its id
        tabs = tabs.filter(tab => tab.id != "fm-tab-connect");
        return tabs;
      }
    }
  </script>
</body>

Step 3. Open the file with Flexmonster (e.g., Pivot.razor) and specify your JavaScript function (e.g., customizeToolbar) in the FlexmonsterComponent’s JavaScriptHandler parameter:

@page  "/"

<h3>Pivot</h3>
<FlexmonsterComponent Report="@report"
                      Toolbar="true"
                      Width="100%"
                      Height="600"
                      JavaScriptHandler="customizeToolbar"
/>

The window.customizeToolbar function will be called after the Flexmonster instance is created. As a result, your customization will be applied to Flexmonster.

See also

• Integration with Blazor
• About the FlexmonsterComponent
• Flexmonster methods
• Flexmonster events