"document" is not defined in <eval> java ScriptEngine

Question

i'm trying to call document in java using scriptEngine here is my code

     ScriptEngineManager scriptEngineManager=new ScriptEngineManager();
     ScriptEngine scriptEngine=scriptEngineManager.getEngineByName("nashorn");
    scriptEngine.eval("function func(){" +
    "document.location.href=someUrl;" +
                  "var text=document.getElementsByTagName('textarea')[0];"}"
                    );
            Invocable invocable= (Invocable) scriptEngine;
            ((Invocable) scriptEngine).invokeFunction("func");

it throws an exception

javax.script.ScriptException: ReferenceError: "document" is not defined in <eval> at line number 1

metlos · Accepted Answer · 2016-03-02 10:24:17Z

3

The script engine in Java provides the ability to execute Javascript code, but does not provide an emulation of a browser.

document, window and other objects are defined by the browsers but are not mandated to be present by ECMAScript specification (http://www.ecma-international.org/ecma-262/5.1/#sec-15).

answered Mar 2, 2016 at 10:24

metlos

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2 Comments

metlos Over a year ago

You don't need javascript to do that. Use HTTP clients like github.com/square/okhttp or hc.apache.org to download the raw HTML of the page. That will NOT give you the DOM of the page as you would expect in a browser, though (which you would not get in a script engine either). To obtain the DOM from the raw html text, check for example this stackoverflow.com/questions/457684/…

DoctorDo Over a year ago

thank you. I want to load document and add EventListener for button programmatically, that's why i'm using javascript.

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