TypeScript!

ui/timeago.ts

@@ -0,0 +1,30 @@
+const UNITS = {
+  year: 12 * 30 * 24 * 60 * 60 * 1000,
+  month: 30 * 24 * 60 * 60 * 1000,
+  day: 24 * 60 * 60 * 1000,
+  hour: 60 * 60 * 1000,
+  minute: 60 * 1000,
+  second: 1000
+};
+
+export default function timeAgo(dtime): string {
+  let res = "";
+  let level = 2;
+
+  for (const [u, t] of Object.entries(UNITS)) {
+    if (dtime >= t) {
+      let n;
+      if (level > 1) {
+        n = Math.floor(dtime / t);
+        dtime -= n * t;
+      } else {
+        n = Math.round(dtime / t);
+      }
+      if (n > 1) res += `${n} ${u}s `;
+      else res += `${n} ${u} `;
+      if (!--level) break;
+    }
+  }
+
+  return res + "ago";
+}