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It's not, because reutrn is a syntax error, but .lenght is valid and would return `undefined`.

Yes it is, it would work fine as a variable. E.g.

  var lenght = 23;
  console.log(lenght);

will not cause any troubles. And many of the results returned by the search are of this kind.

Were you replying to me? I explicitly said .lenght would return undefined. As in, a typo on the .length property.

Sorry -- I figure I misunderstood you.