Java8, Nashorn: failed to load external .js script file

Question

I'm brand new to Nashorn and trying to load my first js file as follow:

public static void main(String[] args) {
        final ScriptEngineManager manager = new ScriptEngineManager();
        final ScriptEngine engine = manager.getEngineByName("nashorn");

        try {   
            engine.eval("load('https://cdn.jsdelivr.net/sockjs/1.0.3/sockjs.min.js')");

        }catch(final ScriptException e) {
            System.err.println(e);
        }

    }

I get the following Exception:

javax.script.ScriptException: TypeError: Cannot read property "prototype" from undefined in http://cdn.jsdelivr.net/sockjs/1.0.3/sockjs.min.js at line number 3

in addition, when I try to evaluate the following:

engine.eval("load('https://code.jquery.com/jquery-1.11.3.min.js')");

the eval() method doesn't return at all - it just stuck on debug (Using Eclipse).

Any idea why prototype isn't defined, any why I cannot evaluate jquery js file?

Thanks!

Use unminified version - that will get you more sensible error location. Also you are trying to load libraries made for browser environment (and possibly Node). I doubt that you will be able to simply load them in vanilla JS engine such as Nashorn or Rhino. — Pavel Horal
– Pavel Horal, Commented Dec 21, 2015 at 14:03

Mike Shauneu · Accepted Answer · 2016-03-15 10:26:21Z

1

Nashorn is a ECMAScript5 compatible JavaScript engine. WebSocket API is not a part of ECMAScript 5 but browser API. That's because you get exception.

answered Mar 15, 2016 at 10:26

Mike Shauneu

3,31924 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Java8, Nashorn: failed to load external .js script file

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related