ERROR - variable console is undeclared

[Felix Wong]

I am using simple compilation level and the compiler is complaining about the variable console is not defined.

console.log("Hello World");

Am I missing an extern or a compiler option would allow this?

Thanks!

[Dimitris Vardoulakis]

With the default options for simple mode, you shouldn't be getting this warning, for console or another free variable with any name.

java -jar build/compiler.jar --compilation_level SIMPLE_OPTIMIZATIONS --js your_js_code

How exactly are you calling the compiler?

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Dimitris

[Felix Wong]

I am using jscomp Ant task with the following options.

        <jscomp compilationLevel="simple" warning="verbose" debug="false"
                output="${build.dir}/cjs/test.min.js"
                languageIn="ECMASCRIPT5_STRICT"
                sourceMapOutputFile="${build.dir}/cjs/test.js.map"
                sourceMapFormat="V3">
                
            <sources dir="${basedir}/resources/WEB-CONTENT/js">
                <file name="test.js"/>
            </sources>
        </jscomp>

On Tuesday, October 15, 2013 12:16:25 PM UTC-4, Dimitris Vardoulakis wrote:

With the default options for simple mode, you shouldn't be getting this warning, for console or another free variable with any name.

java -jar build/compiler.jar --compilation_level SIMPLE_OPTIMIZATIONS --js your_js_code

How exactly are you calling the compiler?

On Tue, Oct 15, 2013 at 9:08 AM, Felix Wong <fmh...@gmail.com> wrote:

I am using simple compilation level and the compiler is complaining about the variable console is not defined.

console.log("Hello World");

Am I missing an extern or a compiler option would allow this?

Thanks!

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Dimitris

[Dimitris Vardoulakis]

You're getting the warning b/c you choose the verbose-warnings option. To use the console, you must use the externs in this file

https://code.google.com/p/closure-compiler/source/browse/externs/webkit_dom.js#211

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[Dimitris Vardoulakis]

As far as I can tell, these externs are provided by default if you call the compiler from the command line, but not if you're using ant.

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Dimitris

[Nick Santos]

I don't believe we've ever provided a default externs that declared
the 'console' global. I usually provide my own externs with

/** @type {Console} */
var console;

[Felix Wong]

With warning level set to VERBOSE, Closure Compiler will complain about console.  I have to provide my own extern for console as Nick pointed out.

Thanks!

[Kyaw]

You can use window.console or goog. global.console