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<!DOCTYPE html> <html> <meta name="viewport" content="width=device-width, initial-scale=1"> <body ontouchstart="isKeyPressed(event)"> <h1>The TouchEvent's altKey Property</h1> <p>Touch somewhere in this document.</p> <p>An alert box will tell you if the ALT key was pressed when the event occured.</p> <p><strong>Tip:</strong> Try holding down the ALT key (if your keyboard has one) when you touch the document.</p> <p><strong>Note:</strong> Many touch devices do not have an ALT key.</p> <script> function isKeyPressed(event) { if (event.altKey) { alert("The ALT key was pressed!"); } else { alert("The ALT key was NOT pressed!"); } } </script> </body> </html>
