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Actually, we did care about this content. I'm not at liberty to explain the details, but we did execute setTimeouts up to some time limit.

If they're smart, they actually make the exact timeout a function of a HMAC of the loaded source, to make it very difficult to experiment around, find the exact limits, and fool the indexing system. Back in 2010, it was still a fixed time limit.

Source: executing JavaScript in Google's indexing pipeline was my job from 2006 to 2010.




What about AJAX? Does it load/read/index data after the fact?




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