Quantifiers in Regex
. -> any one character.
-> zero or more
-> one or more
? -> zero or one
javascript search is case sensitive by default.
Regex - modifiers or flag.
i - case insensitive
g - global match, does not stop after first occurance.
m - multiline search.
s - allow (.) to match new line character.
u - switches on unicode pattern matching.
y - switches on sticky mode.
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