app-already-mounted: Micro app already mounted

Cause

A handle's mount() was called, but when that mount got its turn the app was already mounted. Common cases:

• The handle returned by loadMicroApp mounts on its own, and the caller called mount() again.
• mount() was called twice on the same handle without an unmount() in between.

A handle runs its mount() and unmount() calls one after another in call order, and each one requires the app to be in the matching state.

Troubleshooting

1. Check whether mount() is called right after loadMicroApp.
2. Check that mount() and unmount() calls on the same handle come in pairs.
3. Use getStatus() to confirm which state the app was in when mount() was called.

Solution

You do not need to call mount() after loadMicroApp; await mountPromise instead. To mount again, call unmount() first and then mount().

Related

• Error codes and solutions
• app-already-mounted：微应用已挂载