topic Re: ESRI JS API 4.11: webworkers: document is not defined in ArcGIS JavaScript Maps SDK Questions

ESRI JS API 4.11: webworkers: document is not defined

Anonymous User — Sun, 12 Dec 2021 08:11:30 GMT

I'd like to report a broken functionality, I cannot create the ElevationLayer in webworker anymore, ending with the error of:

{name: "ReferenceError", message: "document is not defined", details: undefined}

Webworker file (excerpt)

Calculator.prototype.startViewshed = function(data, connection) {
  if (!elevationLayer || elevationLayer.url !== data.url) {
    // --> Error happens here
    elevationLayer = new ElevationLayer({
      url: data.url
    });
  }

..
..
..‍‍‍‍‍‍‍‍‍‍‍

I need to create the ElevationLayer so I can create an elevationSampler and run the analysis on it. Apparently, the 4.11 version does require a 'document' to be available, whereas it wasn't a requirement for 4.10 version of ElevationLayer class.

Please advise the relevant workaround for this issue. Thank you.

Re: ESRI JS API 4.11: webworkers: document is not defined

UndralBatsukh — Sun, 12 Dec 2021 08:11:33 GMT

Hi there,

I am not able to reproduce the issue using our workers framework which uses webworkers. I am able to create a new instance of ElevationLayer without errors. The following is super simplified version of the test app.

Worker script
define([
    "esri/layers/ElevationLayer",
    "esri/core/promiseUtils"
  ],
  function (ElevationLayer, promiseUtils) {
    return {
      createPoints: function (data) {
        var url = data.url;

        var elevationLayer = new ElevationLayer({
          url: data.url
        });

        return elevationLayer.load().then(function(){
          console.log("layer", elevationLayer);

          return promiseUtils.resolve({
            data: {
              sr: elevationLayer.spatialReference.toJSON()
            }
          });
        })
        .catch(function(error){
          return promiseUtils.resolve({
            data: {
              error: error
            }
          });
        });
      }
    }
  });‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

HTML APP  
<script src="https://js.arcgis.com/4.11/"></script>

  <script>
    require([
      "esri/Map",
      "esri/views/MapView",
      "esri/layers/ElevationLayer",
      "esri/core/workers/workers"
    ], function (
      Map, MapView, ElevationLayer, workers
    ) {

      var local = window.location.href.substring(0, window.location.href.lastIndexOf('/'));
      var workerUrl = local + "/createPointsWorker.js";

      var map = new Map({
        basemap: "oceans",
      });

      view = new MapView({
        container: "viewDiv",
        map: map,
        zoom: 4,
        center: [-100, 35]
      });

      var url = "https://sampleserver6.arcgisonline.com/arcgis/rest/services/ScientificData/SeaTemperature/ImageServer"

      view.when(function () {
        var params = {
          url: url
        };
        executeWorker(params);
      });

      function executeWorker(params) {
        console.log(workerUrl);
        var connection;

        return workers.open(workerUrl)
          .then(function (conn) {
            console.log(params);
            connection = conn;
            return connection.invoke("createPoints", params);
          })
          .then(function (results) {
            connection.close();
            console.log("results from the workers", results);
          });
      }
    });
  </script>
</head>

<body>
  <div id="viewDiv"></div>
</body>

</html>‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Re: ESRI JS API 4.11: webworkers: document is not defined

Anonymous User — Thu, 16 May 2019 00:30:56 GMT

Hi Undral,

do you have a sandbox somewhere? For me it's simply not working with 4.11, 4.10 works fine. What browser you are using?

Re: ESRI JS API 4.11: webworkers: document is not defined

Anonymous User — Thu, 16 May 2019 02:35:05 GMT

I've tried your sample, it didn't work. I'm 100% sure it's 4.11 that I'm pulling.

Re: ESRI JS API 4.11: webworkers: document is not defined

UndralBatsukh — Thu, 16 May 2019 14:57:12 GMT

Hi there,

A developer on the team was able to reproduce the issue you are describing. We created an issue for this and thank you for bringing this issue to our attention.

Re: ESRI JS API 4.11: webworkers: document is not defined

UndralBatsukh — Fri, 14 Jun 2019 15:07:04 GMT

Hi there,

This bug has been addressed at JS API version 4.12. This version will be released later this month.

Re: ESRI JS API 4.11: webworkers: document is not defined

Anonymous User — Thu, 22 Aug 2019 00:55:32 GMT

Has this been really resolved ? I can't see it in the release ntoes
Release notes for 4.12 | ArcGIS API for JavaScript 4.12

Re: ESRI JS API 4.11: webworkers: document is not defined

UndralBatsukh — Fri, 23 Aug 2019 15:34:39 GMT

Hi there,

The issue is fixed at version 4.12. I apologize that this fix was not listed in the release notes.