Do "" and '' have different meanings in JavaScript? [duplicate]

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When should I use double or single quotes in JavaScript?

Do "" and '' have different meanings in JavaScript?

Because I keep seeing those two usages in jQuery, for instance:

$("")

and

$('')

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No, they mean the same thing; they are both just JavaScript string literals.

Having have multiple different quote styles is useful so that:

• You can nest quotes without having to use escape sequences eg. "some string with 'single quotes' in it", or 'a string with "double quotes" in it', and
• JavaScript strings can be conveniently used inside directly inside HTML, where double-quotes have a special meaning eg <button onclick="alert('foo')">Click me</div>

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Read about strings in JavaScript. There is no difference.

But as HTML properties are often defined with double-quotes, I would use single-quotes, which makes code like

$('<a href="someurl" />') 

easier to write.

Use the one with which you have less characters to escape inside the string.

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Nope. It means the same.

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They both are string delimiters. The only difference is if you can use " to enclose a string with ' in it, and you can use ' to enclose a string with " in it.

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You can use either. I recommend sticking to one standard though throughout your project, things can sometimes get a little messy when interchanging between them when combining with server side code.

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Outside of a string literal, No. Inside of a string literal, Yes.

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No... since isn't possible use "" inside "", the "" and '' make a good combination when need quote a string inside another.