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<html><head><style> #myDIV { margin-top: 20px; border: 2px solid black; width: 200px; height: 200px;}</style></head><body><h1>Change border-end-end-radius with JavaScript</h1><p>Click the "Try it" button to change the border-end-end-radius property of the DIV element:</p><button onclick="myFunction()">Try it</button><div id="myDIV"> <h1>Hello</h1></div><script>function myFunction() { document.getElementById("myDIV").style.borderEndEndRadius = "50px";}</script></body></html>