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javascriptlintunused-variables

Detect and flag unused JS variables

I'm currently using JSHint and JSCS (javascript code style checker) but none of them can detect this kind of unused variables:

describe('XX', function () {

  var XXunused;
  beforeEach(inject(function ($injector) {
    XXunused = $injector.get('XXunused');
  }));

  // XXunused is (as the name says) not used in any other way in this block.

});

Someone knows any tool that can flag automatically these variables?

Solution

  • There is analytics tools called Esprima. Please take a look at the following links:

    http://tobyho.com/2013/12/02/fun-with-esprima/

    https://gist.github.com/Benvie/4657032

    http://ariya.ofilabs.com/2012/11/polluting-and-unused-javascript-variables.html

    You should be familiar with nodejs. Its very easier to use Esprima in nodejs.