Renamed /src to /frontend.

frontend/utils.js

@@ -0,0 +1,27 @@
+
+const dateString = (date) => {
+  if (typeof(date) == "string") {
+    date = new Date(date);
+  }
+  const ye = new Intl.DateTimeFormat('en', { year: 'numeric' }).format(date)
+  const mo = new Intl.DateTimeFormat('en', { month: '2-digit' }).format(date)
+  const da = new Intl.DateTimeFormat('en', { day: '2-digit' }).format(date)
+
+  return `${ye}-${mo}-${da}`
+}
+
+function humanReadableDate(date) {
+  const options = { year: 'numeric', month: 'long', day: 'numeric' };
+  return new Date(date).toLocaleDateString(undefined, options);
+}
+
+function daysAgo(date) {
+  const day = 24 * 60 * 60 * 1000;
+  return Math.round(Math.abs((new Date() - new Date(date)) / day));
+}
+
+export {
+  dateString,
+  humanReadableDate,
+  daysAgo
+}