What sets apart the usage of `import Anything from #anywhere` from not importing anything at all?

When utilizing the autoimport feature of Nuxt 3:

  • Are there any implications (such as types, performance, bundle size, tree shaking, etc.) when using the # alias to import something as opposed to not importing at all?
  • Or is its sole purpose to provide explicit imports and potentially assist in resolving IDE/linter/TypeScript issues?

For instance:

// plugins/vuetify.ts
import { createVuetify, VuetifyOptions } from "vuetify";
import { defineNuxtPlugin, NuxtApp, Plugin } from "#app"; // this line could be considered optional

export const VuetifyPlugin: Plugin = defineNuxtPlugin((nuxtApp: NuxtApp) => {
  const vuetify = createVuetify();

  nuxtApp.vueApp.use(vuetify);
});

export default VuetifyPlugin;

Answer №1

Is there a specific reference for the # import that I wasn't aware of?

It seems like there are no direct benefits to manually making imports when Nuxt automatically handles things like ref, computed, and watch for you. The compiler analyzes your file to determine what you're using in your template + script sections and dynamically imports them at runtime. However, it may have trouble with fully dynamic imports, such as components based on variables.

In terms of performance, it should function exactly the same way. As for types, there may be some limitations but since I don't use TS, I'm not well-informed about all the details.

Most IDEs/code editors should work fine with this system, although some may require a bit of configuration to run smoothly. Linters may also raise some issues if they're not properly informed about the implicit imports.

Nuxt's auto import feature likely functions similarly to https://github.com/antfu/unplugin-auto-import. You can check out this link for a more detailed explanation of how it works.

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