I'm using lunr with es6 syntax which need babel to compile. but babel will always enable the strict mode which will make an error in following source code:

lunr.utils.warn = (function (global) {
  /* eslint-disable no-console */
  return function (message) {
    if (global.console && console.warn) {
      console.warn(message);
    }
  }
  /* eslint-enable no-console */
})(this);

this in strict mode will be undefined instead of the window object .

By the way, I don't understand why using global.console instead of console, is it necessary for some edge case?