Range across different Word.run contexts using OfficeExtension.TrackedObjects class

I am trying to use the OfficeExtension.TrackedObjects class to access a range across different contexts (documentation and similar questions set out below – although slightly outdated). The goal is to have a taskpane search list the results in the taskpane, then select the specific result in-text when clicking the listed result (using javascript).

Here is what I have:

var items = [];
function basicSearch() {
   Word.run(function (context) {
    const results = context.document.body.search("Online");
    results.load("length, text, items");
     return context.sync().then(function () {
      context.trackedObjects.add(results);
    for (let i = 0; i < results.items.length; i++) {
      let x = results.items[i].text;
      createtable("TestList", i, x, x);
      items.push(results.items[i]);
    }
     });
    return context.sync();
   });
}

function createtable(id, x, y, z) {
  var table = document.getElementById(id);
  var row = table.insertRow(-1);
  var cell1 = row.insertCell(0);
  var cell2 = row.insertCell(1);
  var cell3 = row.insertCell(2);
  cell1.type = "button";
  cell1.onclick = function () { selectrange(x) };
  cell2.type = "button";
  cell2.onclick = function () { selectrange(x) };
  cell3.type = "button";
  cell3.onclick = function () { selectrange(x) };
  cell1.innerHTML = x;
  cell2.innerHTML = y;
  cell3.innerHTML = z;
}


function selectrange(x) {
  results.load("text");
  results.items[x].select();
  results.context.sync();
}

Could someone show me where I have gone wrong, or provide a full working example of how to track and call an object (or collection of objects) for use?

Resources:

https://learn.microsoft.com/en-us/javascript/api/office/officeextension.trackedobjects?view=common-js-preview&viewFallbackFrom=office-js
How can a range be used across different Word.run contexts?
Word Online Add-In: Using objects across multiple contexts
Tracked Objects throwing errors in Word Online
https://leanpub.com/buildingofficeaddins
(Building Office Add-ins using Office.js has a working example, but it is in typescript and does not use trackedObjects – I have not been able to replicate it in my add-in).

When I run the above code, it says “ReferenceError: Can’t find variable: results”. I want it to select the specific search results displayed and pressed in the list. Any assistance would be greatly appreciated.