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<!DOCTYPE html> <html> <body> <h1>JavaScript Regular Expression</h1> <h2>The {} Quantifier</h2> <p>A global search for sequence of four digits:</p> <p id="demo"></p> <script> let text = "100, 1000 or 10000?"; let pattern = /\d{4}/g; let result = text.match(pattern); document.getElementById("demo").innerHTML = result; </script> </body> </html>
