_ is undefined, but window._ is not

[tleite]

_ is undefined, but window._ is not

[ifandelse]

@tleite - thanks for the heads up on this. I'll need to investigate further, but after glancing at the UMD wrapper for postal, I'm willing to bet that document is getting passed as root instead of window here (as the this arg): https://github.com/postaljs/postal.js/blob/master/lib/postal.js#L23

Another possible workaround might be to change that line to:

}( window || this, function ( _, global, undefined ) {

Just a guess on my part (at 3 AM). :-) I will look at reproducing the issue tomorrow once I've slept. Speaking of reproducing the issue - if you get a chance let me know what browser, underscore version you're using, as well as if this was just in local dev, or if you were using a site like jsfiddle or jsbin when you get the error. Thanks!

[tleite]

I'm using the latest Chrome on Windows 7, Underscore 1.1.7
This was in local dev on IIS .Net

[dcneiner]

@tleite - How are you including postal on the page? Are you using any sort of script loader, or is it included with normal <script src=""></script> tags?

[ifandelse]

@tleite - what version of postal are you using? Also - what @dcneiner asked would be important to know - an AMD project, or standard browser libs?

[tleite]

I'm using requireJs to load.
Postal version is 0.8.2

Here is the beginning chunk of the file:

[dcneiner]

Hi @tleite!

I suspected this might be the case. As long as you are using RequireJS 2.x this is an easy fix. Basically, underscore is not AMD compatible by default, so you need to use the "shim" feature (and include postal via AMD):

requirejs.config({
    paths: {
        "underscore": "lib/underscore",
        "postal": "lib/postal"
    },
    shim: {
       "underscore": {
           exports: "_"
       }
    }
});

requirejs( [ "postal" ], function ( postal ) {
    // do stuff with postal
});

[ifandelse]

@tleite - I thought I'd throw these here as well (@dcneiner put these together):

• fiddle showing reproducing the issue when underscore isn't shimmed: http://jsfiddle.net/UpMwt/
• fiddle showing it working when the shim is in place: http://jsfiddle.net/UpMwt/2/

[tleite]

Works like a charm! Thank you all for the support!

[ifandelse]

@tleite - no problem! Glad you got it taken care of.