feat: add loading

src/composables/useLoading.ts

@@ -0,0 +1,22 @@
+import { ref } from 'vue'
+
+const pendingCount = ref(0)
+const loading = ref(false)
+
+export function useLoading() {
+  function start() {
+    pendingCount.value++
+    loading.value = true
+  }
+
+  function stop() {
+    if (pendingCount.value > 0) {
+      pendingCount.value--
+    }
+    if (pendingCount.value === 0) {
+      loading.value = false
+    }
+  }
+
+  return { loading, start, stop }
+}