feat: add mountComponent utils

src/utils/index.ts

@@ -1,3 +1,5 @@
+import { createApp, Component } from 'vue';
+
 export { addUnit, getSizeStyle } from './format/unit';
 export { createNamespace } from './create';
 
@@ -40,3 +42,18 @@ export function pick(obj: Record<string, any>, keys: string[]) {
     return ret;
   }, {} as Record<string, any>);
 }
+
+export function mountComponent(RootComponent: Component) {
+  const app = createApp(RootComponent);
+  const root = document.createElement('div');
+
+  document.body.appendChild(root);
+
+  return {
+    instance: app.mount(root),
+    unmount() {
+      app.unmount(root);
+      document.body.removeChild(root);
+    },
+  };
+}