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<!DOCTYPE html> <html> <body> <h1>JavaScript HTML Events</h1> <h2>The onchange Attribute</h2> Enter your name: <input type="text" id="fname" onchange="upperCase()"> <p>When you leave the input field, a function transforms the input to upper case.</p> <script> function upperCase() { const x = document.getElementById("fname"); x.value = x.value.toUpperCase(); } </script> </body> </html>
