Removal of erraneous functionality in CT

[rockindahizzy]

We want to remove functionality that was deemed as erraneous with regards to critical functionality in Component Testing. Use the no-dead-code paradigm when practical to ensure users don't experience unnecessary blockers.

Things that need to be removed

Global

• deprecate style injections (including impl in mount-utils).

React

• mountHook function
• unmount function should no longer be exported
• Auto aliasing of mounted component

Vue

• Remove mount callback

[baus]

Hey team! Please add your planning poker estimate with Zenhub @amehta265 @astone123 @lmiller1990 @marktnoonan @mike-plummer @rockindahizzy @warrensplayer @ZachJW34

[ZachJW34]

I feel like this has been answered but wanted an explicit answer to this: For functionality that is being removed, do we deprecate, deprecate + throw error when used or deprecate + noop/log when used?

[rockindahizzy]

I feel like this has been answered but wanted an explicit answer to this: For functionality that is being removed, do we deprecate, deprecate + throw error when used or deprecate + noop/log when used?

@ZachJW34, my vote is to deprecate + throw.

@marktnoonan, could you give us the preferred method?

[lmiller1990]

It looks like we didn't share the final conclusion to the question in the post above by @rockindahizzy.

We will deprecate styles,stylesheets, mountCallback and unmount. Those will throw errors in Cypress 11. The error will explain the deprecation, and link to the migration guide.

[cypress-bot]

The code for this is done in cypress-io/cypress#24419, but has yet to be released.
We'll update this issue and reference the changelog when it's released.

[cypress-bot]

Released in 11.0.0.

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