Published Mar 08 2019
Return a new string with the text all in upper case.
Does not mutate the original string.
Does not accept any parameter.
Usage:
'Testing'.toUpperCase() //'TESTING'
If you pass an empty string, it returns an empty string.
Itβs similar to toLocaleUpperCase()
, but does not consider locales at all.
I wrote an entire book on this topic π
I also got a super cool course π
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