Closure Compiler API to support define option

[and7ey]

Looks like currently there is no way to disable/remove debug code with Google Closure Compiler API usage, since it doesn't support define flag described here - https://developers.google.com/closure/compiler/docs/js-for-compiler (look for ENABLE_DEBUG variable).

The wiki (https://github.com/google/closure-compiler/wiki/Additional-Webservice-Options) doesn't clarify what is the purpose of debug flag there, but looks like it has some other meaning or not supported by API.

[concavelenz]

If you use Closure Library, you can use the CLOSURE_DEFINES:

https://github.com/google/closure-library/blob/master/closure/goog/base.js#L83

The compiler will pick those up.

[and7ey]

Thanks, but I don't use it. And usage of the library increases compressed size of my script from ~8Kb to ~27Kb.

[mkresin]

Same problem here and solution found. The file mentioned above has a variable COMPILED defined, with the following comment:

Overridden to true by the compiler when --closure_pass * or --mark_as_compiled is specified".

The Google Closure Compiler webservice overrides this variable as well. Dunno if this behaviour is expected and/or somewhere documented.

// ==ClosureCompiler==
// @compilation_level ADVANCED_OPTIMIZATIONS
// @output_file_name default.js
// ==/ClosureCompiler==

/**
* @define {boolean}
*/
var COMPILED = false;

// ADD YOUR CODE HERE
function hello(name) {
  alert('Hello, ' + name);
}

hello('New user');

if (! COMPILED) {
  alert('not compiled');
}