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I am a JavaScript learner and have been researching this matter, but with no success. What is the $ symbol used for in JavaScript besides regular expressions? Any resources or readings regarding this would be appreciated. Thanks.
It doesn’t mean anything special.
But because
$is allowed in identifier names, many Javascript libraries have taken to using$as the “central” interface to them, or at least as a shortcut for accessing their functionality.For example, if you’re using jQuery and you say
$("div"), this is a call to the$function with argument “div”. When you say$.post(), it’s calling thepostmethod on the$object (Javascript is nice in that functions are first-class objects).