Several improvements

lib/format-duration.js

@@ -0,0 +1,24 @@
+(function exposeDurationFormatter(root, factory) {
+  const formatter = factory();
+  if (typeof module === "object" && module.exports) {
+    module.exports = formatter;
+  } else {
+    root.NCCFormatDuration = formatter;
+  }
+}(globalThis, () => function formatDuration(value) {
+  if (typeof value !== "string") return value;
+  const match = value.match(/^P(?:(\d+)D)?(?:T(?:(\d+)H)?(?:(\d+)M)?(?:(\d+)S)?)?$/);
+  if (!match || !match.slice(1).some((part) => part !== undefined)) return value;
+
+  const units = [
+    [match[1], "day"],
+    [match[2], "hr"],
+    [match[3], "min"],
+    [match[4], "sec"]
+  ].filter(([amount]) => Number(amount) > 0);
+
+  if (!units.length) return "0 min";
+  return units.map(([amount, unit]) => (
+    `${Number(amount)} ${unit}${unit === "day" && Number(amount) !== 1 ? "s" : ""}`
+  )).join(" ");
+}));