this undefined when loading arboreal.js

[diN0bot]

I have an error when loading arboreal.js (same error with built file, too):

I'm on a Mac with Chrome.

Uncaught TypeError: Cannot set property 'Arboreal' of undefined

Error is on line 247 of arboreal.js #fee6ba821 , with an anonymous function stacktrace going from 247 to 250 (and that's it).

Via Chrome's inspector:

 if (typeof module !== 'undefined' && module.exports) {
    module.exports = Arboreal;
  } else {
    this.Arboreal = Arboreal;
Uncaught TypeError: Cannot set property 'Arboreal' of undefined
  }

Thanks.

[diN0bot]

When I reference "this" inside the top level function, it loads fine:

!function () {
    this;  // i added this line
    'use strict';
...

[diN0bot]

Minified version works fine without any patching.

[adamshaylor]

Apparently strict mode doesn't like this quirky notation:

!function () {
    console.log(this); //Window
    'use strict';
    console.log(this); //undefined
}(this);

afiore, is there a reason for not using the standard self-executing anonymous function?

(function () {
    console.log(this); //Window
    'use strict';
    console.log(this); //Window
}(this));

[adamshaylor]

I’m still seeing this error intermittently in Chrome for Mac even with the above change. Turning off strict mode seems to be the only reliable cure.

[bitfhacker]

Here too. I had to turn off strict mode to use it well.