Can someone help me create a regular expression for an html5 input pattern attribute that excludes specific items?
How can I convert
into a pattern that will match anything that is not exactly one of these words?
For example, I want the following behavior:
In essence, I am looking for the equivalent of the following regex in JavaScript:
! ['ab', 'aba', 'ba'].some(x => x === term)
To prevent matching specific words, you can utilize a negative lookahead with anchors:
^(?!(?:(dog|cat|bird)$)).*
(?!(?:(dog|cat|bird)$)) is a negative lookahead that will not match expressions containing the words dog, cat, or bird
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