What are the limitations of localstorage keys?

Question

When I query localStorage.feature7f1c3c10-048d-4ced-8ab8-b88ac91b59ee in an inspector console I receive the below.

SyntaxError: At least one digit must occur after a decimal point line: 515 message: "At least one digit must occur after a decimal point" stack: "eval@[native code]↵evaluate@[native code]↵_evaluateOn↵_evaluateAndWrap↵evaluate"

Simple question is why?

score 7 · Accepted Answer · edited May 23 '17 at 12:30

7

The '-' is illegal in keys in dot notation. You will see that

localStorage['feature7f1c3c10-048d-4ced-8ab8-b88ac91b59ee']

is valid.

More on valid JS identifiers (that can be used as keys without quotes) here.

edited May 23 '17 at 12:30

Community

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answered Nov 04 '13 at 22:13

Alexander Presber

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or localStorage.getItem(key) – uber5001 Nov 04 '13 at 22:15
Is there any reason for me to pull out the '-' when I create these? Best practice wise. – Frank Phillips Nov 04 '13 at 22:40
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If you do not rely on using the dot notation, the dashes are just fine. – Alexander Presber Nov 05 '13 at 11:09

What are the limitations of localstorage keys?

1 Answers1