How to avoid duplication of critical data

While developing apps, software developers often have to be sure that a database won't have duplicated data. Users are one of the best example. An username or an email has to be unique for one app. It might seem to be a trivial issue but for some cases, a solution is more sophisticated.

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refs in Vue 3

When I migrated from Vue 2 to Vue 3, one thing was annoying - how to get access to a DOM element in Composition API? In Vue 2, it was easy, you just needed to use the this.$refs object. How to do it in Vue 3?

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