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I am trying to make a javascript library and I was wondering how jQuery uses two names for the same function. Thats what I mean:

jQuery('#div').fadeIn(); and
$('#div').fadeIn(); are the same

Thanks in advance for your answers.

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    as in var $ = jQuery ? Commented Jun 11, 2014 at 0:02

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jquery is aliased to $, like

var $ = jQuery

That's all.

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