x
<html><body><h1>Mouse Events</h1><h2>The buttons Property</h2><div onmousedown="WhichButton(event)" style="border:1px solid black;padding:8px"><p>Click in this box with a mouse button.</p><p>1 = The left button<br>2 = The right button<br>4 = The middle button<br>8 = The fourth button (Browser Back)<br>16 = The fifth button (Browser Forward)<br></p></div><p>The values are combined if you press two buttons at once.</p><p>You pressed: <span id="demo"></span></p><script>function WhichButton(event) { let x = event.buttons; document.getElementById("demo").innerHTML = x;}</script></body></html>