Using JavaScript in the ArcGIS API, I am querying a feature layer from a Map View, calculating points within a certain radius when the user "click" "drag" with the mouse. I want to be able to stop this functionality when the user presses the spacebar. However, I cannot get this to work. In the JavaScript I turn off event propagation for the "click" "drag" event and then cannot turn it back on again. I understand there is not a "on/off" switch for stopPropagation(). Can anyone recommend a different solution or workaround. An extract of the code I am struggling with below:

var bufferEnabled = false;

function keyDownListener(event) {
  var keyInput = event.key;
  bufferEnabled =
    (keyInput === " " || keyInput === "Spacebar") && !bufferEnabled;

function analysis() {
view.when().then(function() {

  const layer = webmap.layers.getItemAt(0);

  view.whenLayerView(layer).then(function(layerView) {
    watchUtils.whenFalseOnce(layerView, "updating", function(val) {
      // Query layer view statistics as the user clicks
      // or drags the pointer across the view.
      view.on(["click", "drag"], function(event) {
        // disables navigation by pointer drag
        queryStatsOnDrag(layerView, event).then(updateCharts);

    view.on("key-down", keyDownListener);
    view.on("key-down", analysis);

1 Answer 1


view.on(...) returns an event object. So save a reference to that by setting a variable (var myEvent = view.on(.....) and then when the user indicates to toggle off, just remove the event (myEvent.remove())

  • I don't know how to do that. You're going to have to spell it out if you will. And thank you for your reply.
    – CGarden
    Commented Jun 4, 2019 at 17:31
  • If someone could elaborate on the above that would be really helpful.
    – CGarden
    Commented Jun 6, 2019 at 13:00
  • Even though it's for 3.x, this page has information on removing events. You could also use on's pausable method
    – kenbuja
    Commented Jul 3, 2019 at 18:09
  • @kenbuja I'll take a look, thank you for that.
    – CGarden
    Commented Jul 19, 2019 at 13:30

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