java - Using React with Nashorn throws "ReferenceError: "console" is not defined" - Stack Ov

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Im using "react": "~0.12.2"

And the following code:

@RequestMapping("/")
@ResponseBody
private String home() throws ScriptException, IOException {
    loadReact();
    InputStream jsStream = resourceLoader.getResource("classpath:public/js/server.js").getInputStream();
    engine.eval(new InputStreamReader(jsStream));
    return engine.eval("renderServerside()").toString();
}

private void loadReact() throws ScriptException, IOException {
    InputStream jsStream = resourceLoader.getResource("classpath:public/lib/react/react.js").getInputStream();

    // React expects 'window' or 'global' to be set
    engine.eval("var global = this");
    engine.eval(new InputStreamReader(jsStream));
}

My server.js looks like this:

function renderServerside() {
    var MyComponent = React.createClass({
        render: function () {
            return React.DOM.h1(null, 'Hi, ' + this.props.msg)
        }
    });

    return React.renderComponentToString(MyComponent({msg: 'World!'}));
}

And getting this exception:

javax.script.ScriptException: ReferenceError: "console" is not defined in <eval> at line number 18108] with root cause

jdk.nashorn.internal.runtime.ECMAException: ReferenceError: "console" is not defined

So how can nashorn not provide a console?

I tired to implement the basic example from this page: React with Nashorn

Im using "react": "~0.12.2"

And the following code:

@RequestMapping("/")
@ResponseBody
private String home() throws ScriptException, IOException {
    loadReact();
    InputStream jsStream = resourceLoader.getResource("classpath:public/js/server.js").getInputStream();
    engine.eval(new InputStreamReader(jsStream));
    return engine.eval("renderServerside()").toString();
}

private void loadReact() throws ScriptException, IOException {
    InputStream jsStream = resourceLoader.getResource("classpath:public/lib/react/react.js").getInputStream();

    // React expects 'window' or 'global' to be set
    engine.eval("var global = this");
    engine.eval(new InputStreamReader(jsStream));
}

My server.js looks like this:

function renderServerside() {
    var MyComponent = React.createClass({
        render: function () {
            return React.DOM.h1(null, 'Hi, ' + this.props.msg)
        }
    });

    return React.renderComponentToString(MyComponent({msg: 'World!'}));
}

And getting this exception:

javax.script.ScriptException: ReferenceError: "console" is not defined in <eval> at line number 18108] with root cause

jdk.nashorn.internal.runtime.ECMAException: ReferenceError: "console" is not defined

So how can nashorn not provide a console?

I tired to implement the basic example from this page: React with Nashorn

• java
• javascript
• reactjs
• nashorn

Share Improve this question Follow edited Jan 20, 2015 at 16:17 daniula 7,02844 gold badges3535 silver badges4949 bronze badges asked Dec 24, 2014 at 12:14 TarionTarion 17.2k1313 gold badges7777 silver badges113113 bronze badges

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1 Answer 1

Sorted by: Reset to default 8

Rhino before it didn't provide one either. You can implement your own console with something like

console = { 
    log: print,
    warn: print,
    error: print
};

For full blown console support you might need to add more functions. See: Console

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