新建项目

utils/format.js

@@ -0,0 +1,30 @@
+function pad(value) {
+  return String(value).padStart(2, "0");
+}
+
+function formatCountdown(totalSeconds) {
+  const safe = Math.max(0, Math.floor(totalSeconds || 0));
+  const minutes = Math.floor(safe / 60);
+  const seconds = safe % 60;
+  return `${pad(minutes)}:${pad(seconds)}`;
+}
+
+function formatTime(timestamp) {
+  const date = new Date(timestamp);
+  return `${pad(date.getHours())}:${pad(date.getMinutes())}`;
+}
+
+function randomCode() {
+  return String(Math.floor(100000 + Math.random() * 900000));
+}
+
+function clone(value) {
+  return JSON.parse(JSON.stringify(value));
+}
+
+module.exports = {
+  formatCountdown,
+  formatTime,
+  randomCode,
+  clone
+};