Allow specific names in publicRuntimeConfig

[ivodolenc]

Hi and thanks for your work on Nuxt.

Request

As I mentioned in the official Nuxt Discord, can you please consider allowing users to use words/names such as app in project configuration?

It's short, strong meaning and definitely one of the most common for a configuration within a project. I think this approach that doesn't allow the use of such common names in the project configuration can be very confusing and problematic for debugging.

Code example

This worked fine until version 2.15.0, so it's kind of a breaking-change:

// nuxt.config.js

export default {
  publicRuntimeConfig: {
    // Doesn't work after version '2.14.12'
    app: {
      title: 'New Title',
      titleSeparator: '-',
      titleTemplate: 'Title Template',
      description: 'New Description',
    },
  },
}

Suggestion

As Daniel said in Discord chat:

Nuxt is using the app namespace for internal dynamic config.

It might make more sense to use alternatives under the hood (in Nuxt core such as _app or __app) and allow users to use the normal versions (such as app).

Other examples

This is allowed in Next.js.

[danielroe]

Related: #9039.

I think this is reasonable (using _app for Nuxt internal namespace to prevent collisions).

[ivodolenc]

Awesome 👍 This will be available in the next release, right?