vue-api | vue中extend，mixins，extends，components , install的几个api对比 | Frontend Utils library

Any call to npm run after upgrading to Mix v4.x results in mix being undefined. I see errors like this on every run:

I have a wrapper component which provides the children with API calls and stores the result, and a list component which shows the requested items passed via prop. The problem is that it shows them in development mode but doesn't in production though API call is ok in both cases and the response is correct.

Both modes I ran in the same environment. Looks like a reactivity issue.

This is a template code:

Any call to npm run produces this error:

I've got a basic client-side rendered vue app that fetches a json array from an API endpoint and renders data from each array item as a list item in an ordered list.

The data renders as expected when I'm developing locally, using parcel index.pug to spin up my local dev environment. Here's a screenshot of the expected ordered list as shown in my local dev environment at localhost:1234:

However, the data does not render as expected when I build for production (using parcel build index.pug). Here's a screenshot of the unexpected behavior in production mode (which you can see live online at https://errands.netlify.com/):

Notice that the production version knows the fetched API data is an array with a length of 6 (because it renders out 6 empty