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<!DOCTYPE html> <html> <body> <h2>JavaScript Timing</h2> <p>A script on this page starts this clock:</p> <p id="demo"></p> <button onclick="clearInterval(myVar)">Stop time</button> <script> let myVar = setInterval(myTimer ,1000); function myTimer() { const d = new Date(); document.getElementById("demo").innerHTML = d.toLocaleTimeString(); } </script> </body> </html>
