refactor: make styles, js common for posts

scripts/common.js

@@ -0,0 +1,30 @@
+const TERMINAL_PROMPT = "barrett@ruth:~$ ";
+let clearing = false;
+
+function clearPrompt(delay, callback) {
+  if (clearing) return;
+  clearing = true;
+
+  const terminalPrompt = document.querySelector(".terminal-prompt");
+  const topicLength = terminalPrompt.innerHTML.length - TERMINAL_PROMPT.length;
+  let i = 0;
+
+  function removeChar() {
+    if (i++ < topicLength) {
+      terminalPrompt.textContent = terminalPrompt.textContent.slice(0, -1);
+      setTimeout(removeChar, delay / topicLength);
+    } else {
+      i = 0;
+      clearing = false;
+      callback && callback();
+    }
+  }
+
+  removeChar();
+}
+
+function goHome(e) {
+  e.preventDefault();
+
+  clearPrompt(500, () => (window.location.href = "/"));
+}