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JavaScript jQuery Basics (2014) Creating a Mobile Drop Down Menu Using parent(), hasClass() and prop()

Posted by Adam Zuckerberg
Adam Zuckerberg
22,248 Points

Javascript: confused about quotes

I am totally confused about quotes. Why do you use quotes or no quotes. It seems totally random. For example: $option.prop("selected", true); Why is true w/o quotes while "selected" is with quotes as they are both properties and nothing is being quoted in either case? In javascript, is there a rule?

1 Answer

oisin
oisin
5,286 Points

Javascript has different types of data

  • Data with quotes (either single ' ' or double " ") are called strings.

  • Numbers are another type of data, they don't take quotes

  • Booleans (true or false) are another type of value which don't take quotes.

Using your example:

$option.prop("selected", true) 
// "selected" is a string and true is a Boolean

But if true had quotes around it, that would make it a string

Strings can have any value inside of the quotes, including numbers

var example = "73"
// This is a string

I hope this helped