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  1. const uuidv4Regex = /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/;
  2.  
  3. const testString = "testing";
  4. const isUUIDV4 = testString.match(uuidv4Regex); //will return false
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