In the Developer Console Preview the "e.force:showToast" event is available but when fired does not produce any output. (Putting the same components in an App Builder app does produce output.)

Is there a reliable way to detect this situation? I'm indirecting through a component that could present the error inline in the page if it knew that the toast was going to fail.

(This Lightning: How to detect Salesforce1 context? isn't a solution as I can get a reference to the event but firing the event results in no output.)

  • Is this still an open question?
    – Adrian Larson
    Feb 3, 2021 at 23:04
  • Hi @AdrianLarson, Not something I care about any more, but also not solved.
    – Keith C
    Feb 4, 2021 at 8:37

1 Answer 1

setErrorMessage : function(cmp, msg) {
        var toastEvent = $A.get("e.force:showToast");
         if(toastEvent == undefined){
            var msgDiv = cmp.find("errorMessageDiv");
            cmp.set("v.errorMessage", msg);
                "title": "Error",
              "message": msg,
              "type": "error"

Alternatively, you can register your event in component markup and then catch it in cases where you use Lightning out in Visualforce, etc. Registering event will not return undefined from $A.get().

This is useful for system events like navigateToComponent

  <aura:registerEvent name="force:navigateToComponent" type="force:navigateToComponent" />

This will return event, it will fire and you can code your custom logic around, for example in your Visualforce page:

function navigateToVisualforce(e) {
      var params = e.getParams();
      if (params.componentDef === 'NameSpace:Foo') {
        window.parent.location.href = '/apex/baz'
    $Lightning.use("NameSpace:LightningOutApp", function () {
      $Lightning.createComponent("NameSpace:MyComponent", {}, "lightning", function (cmp) {
        // Listen to redirect events.
          {"event": "force:navigateToComponent", "handler": navigateToVisualforce}
  • Thanks for answering. The problem I'm trying to solve is how to automatically identify "cases where you use Lightning out in Visualforce" which appears to include "Preview" from the Developer Console where the toast event is not undefined.
    – Keith C
    Nov 25, 2017 at 10:33
  • Oooh 😮 I see what you mean, sorry!
    – dzh
    Nov 25, 2017 at 21:22

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