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regex do not contain

^((?!word).)*$

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

regular expression should not contain special character

//Author: Mohammad Arman Khan
//Regular Expression should not contain Special Characters
var regex = /^[A-Za-z0-9 ]+$/;
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Regex not contains

^((?!hede).)*$
Comment

regex not contains

^(?!keyword).*
 // Regex pattern to find lines that do not contain keyword, incl newline
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