Correct copy code block text

js/script.js

@@ -34,15 +34,24 @@ docReady(function() {
         boxCopy.textContent = "Copy"
 
         boxCopy.onclick = function() {
-            // Get text inside (remove 4 first char corresponding to "Copy")
-            let srcText = this.parentNode.textContent.slice(4)
+            // Create a clone the node to not affect the original one
+            let nodeClone = this.parentNode.cloneNode(true)
+
+            // Remove Line Numbers and Copy Button
+            let linenumNodes = nodeClone.querySelectorAll('.linenr,.src-copy')
+            for (var i = linenumNodes.length - 1 ; i >= 0 ; --i) {
+                nodeClone.removeChild(linenumNodes[i])
+            }
+
+            // Copy the filetered content to the clipboard
+            let srcText = nodeClone.textContent
             navigator.clipboard.writeText(srcText).then(function() {
                 boxCopy.textContent = "Copied"
                 boxCopy.classList.add("src-copied")
                 setTimeout(function() {
                     boxCopy.textContent = "Copy"
                     boxCopy.classList.remove("src-copied")
-                },1000);
+                }, 2000);
             });
         }