Uncaught Error: Zone already loaded

[CanKer]

I don't really know how it happened but I got the "Uncaught Error: Zone already loaded" error in my console after doing some POST petitions. The functionality it's ok, but the look of the app it changes.

[hctomkins]

+1

[AGoodnight]

Make sure your not loading the module twice, I had it hiding in my index file:

...
<script src="node_modules/zone.js/dist/zone.js"></script> // <-- I removed this
...

Incidentally if you load it more than once you screw up the router a bit. You need to click your routing links multiple times when this bug arises after loading it too many times.

[rabbit-will-run]

EDIT: The problem was actually that I was including the script twice. Actually, I was including another script (which had zone as a dependency) twice.

[hctomkins]

It was the same with me. If this happening to you, try removing where you include zone.js from your index.html

[Splaktar]

This looks like a project configuration issue rather than a Zone.js bug. That said, the error message could be more helpful. It should specify the name of the zone that is already loaded or some identifying information. In my case, the stack trace pointed to three different source files in my code, none of which were really helpful.

For me, this ended up being an issue with my Polymer dependencies from Bower. If I am missing a Polymer dependency, then this error occurs saying Uncaught Error: Zone already loaded. Fixing my bower.json and my imports in elements.html resolved the error.

[gandra]

Angular has a terrible debug feedback ... zone not loaded ... thank you very much!

Look at the quality of provided info (this is my case) ... all test pass ok, build pass ok, deploy pass and in the runtime I found this:

Uncaught Error: Zone already loaded.
 at /vendor.bundle.js:129468:15 [<root>]
 at /vendor.bundle.js:130572:3 [<root>]
 at NO_ZONE.name (vendor.bundle.js:129454) [<root>]
 at Object.<anonymous> (vendor.bundle.js:129457) [<root>]
 at Object.<anonymous> (vendor.bundle.js:131514) [<root>]
 at __webpack_require__ (inline.bundle.js:53) [<root>]
 at Object.378 (main.bundle.js:2231) [<root>]
 at __webpack_require__ (inline.bundle.js:53) [<root>]
 at Object.343 (main.bundle.js:235) [<root>]
 at __webpack_require__ (inline.bundle.js:53) [<root>]
 at Object.824 (main.bundle.js:3100) [<root>]
 at __webpack_require__ (inline.bundle.js:53) [<root>]
 at webpackJsonpCallback (inline.bundle.js:24) [<root>]
 at /main.bundle.js:1:1 [<root>]

[JiaLiPassion]

Thank you for all the information , I will try to make the error message more helpful.

[gandra]

Kudos to @JiaLiPassion for attitude!

[JiaLiPassion]

@gandra , thank you!!