callback

About this parameter

The name of a globally accessible function that will be called with the result instead of the default rendering. Only pass the name of an already-defined function — never write the function's code directly inside the attribute.

To avoid clashing with other scripts on the page, define your callback as a property on your own namespace object rather than directly on window.

Usage examples

  window.rekaiCallbacks = window.rekaiCallbacks || {};
 
  window.rekaiCallbacks.customRenderPredictions = function(data) {
    data = JSON.parse(data);
    console.log(data);
  };

  <div class="rek-prediction" data-callback="rekaiCallbacks.customRenderPredictions"></div>

Important

• data-callback must reference a named function, e.g. rekaiCallbacks.customRenderPredictions — not an inline function body such as data-callback="(data) => { ... }".
• The referenced function must be defined and available on window before the prediction request completes (typically: defined in a <script> tag earlier on the page).
• Passing anything other than a simple function name (dots allowed for namespacing) will be rejected and no callback will run.