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Rev

This is wasteful when used on a selector. If you just selected it from the document, you know it’s in the document.
– Ry- ♦
Commented Feb 10 at 0:57
I would argue that by the same standard, many usages of jQuery are wasteful - but for some people it's still a valid choice and enough. I appreciate you taking the time to comment on this answer, but I think the downvote is not really appropriate, since I've answered the OP's question "How can I check the existence of an element in jQuery?" quite to the point. What do you think, @Ry-?
– Oliver
Commented Feb 16 at 13:46
I disagree. Often, uses of jQuery are a necessary tradeoff between efficiency and expressiveness. Not only is this one unnecessary, it also confuses the reader.
– Ry- ♦
Commented Feb 16 at 17:12

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