Update:
I committed a test following a comment and four upvotes to very comment. It turns out that what I had said is the correct answer. Here is the result:
http://jsperf.com/hasclass-vs-is-so
The is
is multi-purpose, you can for example do is('.class')
, is(':checked')
, etc which means is
has more to do where is hasClass
is limited which only checks for a class being set or not.
Hence, hasClass
should be faster if performance at any level is your priority.
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