[UI] Fix copy button layout shift and add checkmark confirmation

assets/js/click-to-copy.js

@@ -0,0 +1,96 @@
+const codeListings = document.querySelectorAll('.highlight > pre');
+for (let index = 0; index < codeListings.length; index++) {
+  const codeSample = codeListings[index].querySelector('code');
+
+  const copyButton = document.createElement('button');
+  const buttonAttributes = {
+    type: 'button',
+    title: 'Copy to clipboard',
+    'data-bs-toggle': 'tooltip',
+    'data-bs-placement': 'top',
+    'data-bs-container': 'body',
+  };
+
+  Object.keys(buttonAttributes).forEach((key) => {
+    copyButton.setAttribute(key, buttonAttributes[key]);
+  });
+
+  copyButton.classList.add(
+    'fas',
+    'fa-copy',
+    'btn',
+    'btn-sm',
+    'td-click-to-copy'
+  );
+  const tooltip = new bootstrap.Tooltip(copyButton);
+
+  let revertTimeout;
+
+  copyButton.onclick = () => {
+  copyCode(codeSample)
+    .then(() => {
+      copyButton.setAttribute('data-bs-original-title', 'Copied!');
+      tooltip.show();
+      copyButton.classList.remove('fa-copy');
+      copyButton.classList.add('fa-check', 'td-click-to-copy--copied');
+      clearTimeout(revertTimeout);
+      revertTimeout = setTimeout(() => {
+        copyButton.classList.remove('fa-check', 'td-click-to-copy--copied');
+        copyButton.classList.add('fa-copy');
+        copyButton.setAttribute('data-bs-original-title', 'Copy to clipboard');
+        tooltip.hide();
+      }, 2500);
+    })
+    .catch((err) => {
+      console.warn('Failed to copy code to clipboard:', err);
+      copyButton.setAttribute('data-bs-original-title', 'Failed to copy');
+      tooltip.show();
+      clearTimeout(revertTimeout);
+      revertTimeout = setTimeout(() => {
+        copyButton.setAttribute('data-bs-original-title', 'Copy to clipboard');
+        tooltip.hide();
+      }, 2500);
+    });
+};
+  const buttonDiv = document.createElement('div');
+  buttonDiv.classList.add('click-to-copy');
+  buttonDiv.append(copyButton);
+  codeListings[index].insertBefore(buttonDiv, codeSample);
+}
+
+const copyCode = (codeSample) => {
+  const isConsoleBlock = codeSample.matches(
+    "code[data-lang='console'], code.language-console"
+  );
+  let text;
+
+  if (isConsoleBlock) {
+    const clone = codeSample.cloneNode(true);
+    pruneUnselectableElements(codeSample, clone);
+    text = clone.textContent;
+    text = text.replace(/^ /gm, '');
+  } else {
+    text = codeSample.textContent;
+  }
+  text = text ? text.trim() : '';
+  return navigator.clipboard.writeText(text + '\n');
+  };
+
+const pruneUnselectableElements = (sourceNode, cloneNode) => {
+  const sourceChildren = sourceNode.children;
+  const cloneChildren = cloneNode.children;
+
+  for (let i = sourceChildren.length - 1; i >= 0; i--) {
+    const sourceChild = sourceChildren[i];
+    const cloneChild = cloneChildren[i];
+    const style = window.getComputedStyle(sourceChild);
+    const unselectable =
+      style.userSelect === 'none' || style.webkitUserSelect === 'none';
+    if (unselectable) {
+      cloneChild.remove();
+      continue;
+    }
+
+    pruneUnselectableElements(sourceChild, cloneChild);
+  }
+};

assets/scss/_styles_project.scss

@@ -705,6 +705,14 @@ a:not([href]):not([class]):hover {
   &:hover {
     color: $body-color !important;
   }
+
+  &:active {
+    transform: none !important;
+  }
+
+  &.td-click-to-copy--copied {
+    color: $success !important;
+  }
 }
 
 .tooltip .tooltip-inner {