regex doesn t contain Code Answer’s

The regex pattern doesn't contain can be used to exclude strings from a regular expression that you want to match. It's also useful for excluding text that will always be included in the regular expression. For example, if you have a string that always contains "Hello", you can use regex doesn't contain to exclude it from your search.

regex do not contain

on Jan 01, 1970
^((?!word).)*$

// Test
/^((?!word).)*$/gi.test('Should not contain word') // Returns false
/^((?!word).)*$/gi.test('John Doe') // Returns true

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regex not contain

on Jan 01, 1970
^((?!hede).)*$

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regex not contains

on Jan 01, 1970
^(?!keyword).*\n // Regex pattern to find lines that do not contain keyword, incl newline

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A regex that doesn't contain the string searched for (the pattern) is called a failsafe or empty search. If you want to find all strings that match your pattern, but don't want to include any of them in your output, you can use the /g modifier.

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