Regular Expressions 101

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/
(?<!informa)ción
/
g
Negative Lookbehind
(?<!informa)
Assert that the Regex below does not match
informa
matches the characters informa literally (case sensitive)
ción
matches the characters ción literally (case sensitive)
Global pattern flags
g modifier: global. All matches (don't return after first match)
Your regular expression does not match the subject string.Try launching the debugger to find out why.

Regular Expression
No Match

/
/
g

Test String