x
<html><head><style> div { border: 15px solid transparent; padding: 15px; border-image: url(border.png); border-image-slice: 30; border-image-repeat: round; }</style></head><body><h1>Change border-image-slice with JavaScript</h1><div id="main"> <h1>Hello</h1></div><p>Click the "Try it" button to change the value of the borderImageSlice property.</p><button onclick="myFunction()">Try it</button><script>function myFunction() { document.getElementById("main").style.borderImageSlice = "30%";}</script></body></html>