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JavaScript jQuery Basics (2014) Creating a Simple Drawing Application Perform: Part 1

Posted by Asia Chan
Asia Chan
11,007 Points

Why use "color" instead of "$color" in naming the variable?

I thought it was ideal to append the $ sign when we are using jQuery? Or do we remove $ for global variables?

1 Answer

Adam Kelm
Adam Kelm
29,082 Points

You would use the $ when you're saving the variable as a jQuery object, but not when the variable is only information drawn from that object. So in this instance, if you planned on using $(".selected") repeatedly, you could cache that as a variable named $selected. However, since it's var color = $(".selected").css("background-color"), the var color only stores the CSS property, which isn't a jQuery object.

Just remember, adding $ to variables is only for caching jQuery objects that will be repeatedly searched.

Asia Chan
Asia Chan
11,007 Points

Thanks Adam!

Grace Ji
Grace Ji
5,402 Points

Good question and good answer!!