Pattern matching for car license plate numbers that has to eliminate any special characters

I tried implementing this pattern, but it seems to allow special characters. How can I modify it to exclude them?

ng-pattern ="/^([A-Z]{2,3}[0-9]{2}[A-Z0-9]{1,4}[0-9]{1,4})|([A-Z]{2}[0-9]{3})|([A-Z]{2}[0-9]{2}[A-Z]{1}[0-9]{1,4})|[^@]|$/"

Answer №1

Here's a helpful tip: using [^@] in your regex will exclude the "@" character from matching. If you remove this condition, your regex should be able to match alphanumeric strings instead.

For a clearer understanding, it would be beneficial to provide an example input along with the expected output. However, if you'd like to see a working example, you can check out this link: here.

Answer №2

The specified pattern consists of 5 possible components that are delineated by the symbol OR |

  1. ^([A-Z]{2,3}[0-9]{2}[A-Z0-9]{1,4}[0-9]{1,4}) - The pattern begins with this sequence and can include special characters or any other characters
  2. ([A-Z]{2}[0-9]{3}) - matches a specific patternTHIS PATTERNfinds another distinct pattern
  3. ([A-Z]{2}[0-9]{2}[A-Z]{1}[0-9]{1,4}) - identifies a certain patternTHIS PATTERNdetermines a different pattern
  4. [^@] - Identifies any pattern without the inclusion of @
  5. $ - Recognizes any given pattern

If I deciphered correctly (not entirely confident about the 4th component), it seems that you are interested in patterns ^(1|2|3)$, where pattern 1 is not preceded by ^

/^(([A-Z]{2,3}[0-9]{2}[A-Z0-9]{1,4}[0-9]{1,4})|([A-Z]{2}[0-9]{3})|([A-Z]{2}[0-9]{2}[A-Z]{1}[0-9]{1,4}))$/

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