Question

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What is the meaning of “$” sign in javascript

I’ve encountered a code in JavaScript that looks like this:

$('svg circle').tipsy({ 
    gravity: 'w', 
    html: true, 
    title: function() {
      return 'Color: '; 
    }
});

What does $('') mean here?

Answer 1

Usually when you encounter $(), that means the developer is using a javascript library, such as jQuery.

The $ symbol is the namespace for those libraries. All the functions they define begin with $., such as $.get(). Passing the id of an html tag like this: $("#myId") will give you a jQuery object representing that node.