ContentLoad

<base href="https://demos.telerik.com/kendo-ui/splitter/ajax"> 
<div id="splitter">
  <div></div>
  <div></div>
</div>

<script>
  $(document).ready(function() {
    $("#splitter").kendoSplitter({
      panes: [
        { contentUrl: '../content/web/splitter/ajax/ajaxContent1.html' },
        { contentUrl: '../content/web/splitter/ajax/ajaxContent2.html' }
      ],
      contentLoad: function(e) {
        /* The result can be observed in the DevTools(F12) console of the browser. */
        console.log($(e.pane).html() + " has been loaded");
      }
    });
  });
</script> 

<style>
  #splitter {
    height: 480px;
  }
</style>

<base href="https://demos.telerik.com/kendo-ui/splitter/ajax"> 
<div id="splitter">
  <div></div>
  <div></div>
</div>
<script>
  function splitter_contentLoad(e) {
/* The result can be observed in the DevTools(F12) console of the browser. */
    console.log($(e.pane).html() + " has been loaded");
  }
  $("#splitter").kendoSplitter({
    panes: [
      { contentUrl: '../content/web/splitter/ajax/ajaxContent1.html' },
      { contentUrl: '../content/web/splitter/ajax/ajaxContent2.html' }
    ]
  });
  var splitter = $("#splitter").data("kendoSplitter");
  splitter.bind("contentLoad", splitter_contentLoad);
</script>