Add copy function

assets/js/main.js

@@ -1,5 +1,29 @@
-console.log("This site was generated by Hugo.");
-function copyText() {
-  const text = document.getElementById("copyText").innerText;
-  navigator.clipboard.writeText(text);
-}
+document.addEventListener("DOMContentLoaded", function () {
+  const codeBlocks = document.querySelectorAll("pre, code");
+
+  codeBlocks.forEach(function (codeBlock) {
+    codeBlock.style.cursor = "pointer";
+    codeBlock.title = "Click to copy";
+
+    codeBlock.addEventListener("click", function () {
+      const selection = window.getSelection();
+      const range = document.createRange();
+      range.selectNodeContents(codeBlock);
+      selection.removeAllRanges();
+      selection.addRange(range);
+
+      try {
+        document.execCommand("copy");
+        const originalText = codeBlock.innerText;
+        codeBlock.innerText = "Copied!";
+        setTimeout(function () {
+          codeBlock.innerText = originalText;
+        }, 1000); // Reset the text after 1 second
+      } catch (err) {
+        console.error("Unable to copy:", err);
+      }
+
+      selection.removeAllRanges();
+    });
+  });
+});