The world's shortest ie determines if (! + [1 ,])

Source: Internet
Author: User

although Mr. Situ's blog shows that the world's shortest IE has been determined for a long time, he hasn't been very careful about the principles, today, my colleague (also a member of the Program , not the front-end) asked this question again. So I have carefully studied this front-end layman, I have basically understood it. paste it here for backup and the experts will bypass it to avoid wasting time

  

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