Cannot access anonymous function

Question

There are two environments which using the 3rd party library (BrowserPrint.js);

WORKING ENV - JS and jQuery where 3party libraries are included simply in the <head> part of the document

and the main function is called in
```
$(document).ready(setup_web_print);
```

NOT WORKING ENV - Angular, JS and jQuery

where 3rd party libraries are included in component:

import * as $ from 'jquery';
import * as bp from '../../../content/js/BrowserPrint-1.0.4.js';

and triggered in ngOnInit() lifecycle hook:

ngOnInit() {
   $(document).ready(function () {
    ... 
   })
...
}

There is an error in console

ReferenceError: finishedFunction is not defined
at Object.t.getDefaultDevice (BrowserPrint-1.0.4.js:95)

so it seems it cannot access finishedFunction

var a = n("GET", e("available"));
        a && (finishedFunction = function(e) {
            response = e, response = JSON.parse(response);
            for (var n in response)
                if (response.hasOwnProperty(n) && response[n].constructor === Array) {
                    arr = response[n];
                    for (var i = 0; i < arr.length; ++i) arr[i] = new t.Device(arr[i])
                }
            return void 0 == o ? void r(response) : void r(response[o])
        }, i(void 0, a, finishedFunction, s), a.send())

Does anybody know how to fix this and why doesn't work with in second env?

chsymann · Accepted Answer · 2018-11-26 13:57:42Z

1

I really don't know how JavaScript is handling this comma-written code. But I think this is what you want, isn't it?

 if(a) {
    var finishedFunction = function(e) {
      if (response = e, "" == response) return void s(null);
      response = JSON.parse(response);
      var n = new t.Device(response);
      s(n)
    };
    i(void 0, a, finishedFunction, o);
    a.send();
 }

answered Nov 26, 2018 at 13:57

chsymann

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3 Comments

GPW Over a year ago

Apparently it'll just evaluate all the arguments then return the last one. developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/…

chsymann Over a year ago

@GPW thank you for that clarification! But as far as I can see he is not even reading the return value. So I would say it could be rewritten like I showed.

GPW Over a year ago

Yes, looked reasonable... And on slightly more careful reading It doesn't look like it'd execute the call to finishedFunctionif a evaluated to false, which is what I thought might be wrong. Either way, that code is not particularly readable in that form!

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