Initial commit

src/composables/useTimer.js

@@ -0,0 +1,49 @@
+import { ref, onUnmounted } from 'vue';
+
+export function useTimer() {
+  const time = ref(0);
+  const timerInterval = ref(null);
+  const isRunning = ref(false);
+
+  const formatTime = (seconds) => {
+    const m = Math.floor(seconds / 60).toString().padStart(2, '0');
+    const s = (seconds % 60).toString().padStart(2, '0');
+    return `${m}:${s}`;
+  };
+
+  const start = () => {
+    if (isRunning.value) return;
+    isRunning.value = true;
+    const startTime = Date.now() - (time.value * 1000);
+    
+    timerInterval.value = setInterval(() => {
+      time.value = Math.floor((Date.now() - startTime) / 1000);
+    }, 1000);
+  };
+
+  const stop = () => {
+    if (timerInterval.value) {
+      clearInterval(timerInterval.value);
+      timerInterval.value = null;
+    }
+    isRunning.value = false;
+  };
+
+  const reset = () => {
+    stop();
+    time.value = 0;
+  };
+
+  onUnmounted(() => {
+    stop();
+  });
+
+  return {
+    time,
+    isRunning,
+    start,
+    stop,
+    reset,
+    formatTime
+  };
+}