how can i forbid auto install?

[cereschen]

Or During the second installation, no errors are thrown?
I had trouble using WebComponent.

[antfu]

@cereschen Can you provide more context?

[cereschen]

If I use composition-api in WebComponent,
I can only use the CDN approach (including projects that use the WebComponent),
otherwise composition-api might be installed several times and throw an error.
I can use plugininstAlledFlag to determine whether to install it, but only if it doesn't install automatically

[antfu]

How about importing @vue/composition-api before importing vue?

[cereschen]

How about importing @vue/composition-api before importing vue?

Since I'm using vue in the cdn, it's hard to avoid this problem, so I decided to use the cdn as well for comperation-api, but even so, hopefully there's a way to lower the error level so that the program runs smoothly.