1051891 - ReferenceError: Iterator is not defined with simple Add-On

Status: RESOLVED WONTFIX

(Add-on SDK Graveyard :: General, defect)

Description

[Philipp Kewisch [:Fallen][☁️📆]]

Simplified STR:

1) Create an addon with jpm, use default settings
2) Replace index.js contents with "Iterator({})"
3) jpm run


Results:

console.error: jpm: 
  Message: ReferenceError: Iterator is not defined
  Stack:
    @resource://jpm/index.js:2:1
run@resource://gre/modules/commonjs/sdk/addon/runner.js:138:19
startup/</<@resource://gre/modules/commonjs/sdk/addon/runner.js:81:7
Handler.prototype.process@resource://gre/modules/Promise-backend.js:866:23
this.PromiseWalker.walkerLoop@resource://gre/modules/Promise-backend.js:745:7

I've tested this with the Firefox Nightly from 2014-08-11.

Comment 1

[Tomislav Jovanovic :zombie]

the `Iterator` is a proprietary firefox extension to the JS, and the recommendation is to use the new standard stuff available in recent ES versions, like `Object.keys()` and 

  for (let x of obj)

but if you have a specific use case not covered here, feel free to ask..

Comment 2

[Philipp Kewisch [:Fallen][☁️📆]]

I'm fine with using other alternatives, I'm just surprised it doesn't work. Is support for Iterator() going away or does this maybe have to do with the loader deleting the Iterator from the sandbox here:

http://mxr.mozilla.org/mozilla-central/source/addon-sdk/source/lib/toolkit/loader.js#237

If you'd rather close this bug WONTFIX thats fine with me too, its up to you.

Comment 3

[Tomislav Jovanovic :zombie]

i'm gonna guess that's probably because we (mozilla, SM folks) want to discourage the use of that..