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<!DOCTYPE html> <html> <body> <h1>Regular Expressions</h1> <h2>Character Classes [abc]</h2> <p>A global search for the characters "HW" in a string:</p> <p id="demo"></p> <script> let text = "Hello World!"; const pattern = /[HW]/g; let result = text.match(pattern); document.getElementById("demo").innerHTML = result; </script> </body> </html>
