Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)
• Build (npm run build) was run locally and any changes were pushed
• Lint (npm run lint) has passed locally and any fixes were made for failures

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

What is the current behavior?

When fixing #24481 I discovered that Next.js crashes on the setupIonicReact check because document is not defined.

What is the new behavior?

• Ensure document is defined before calling it
• I also use the same pattern in Ionic Vue now for consistency, but the functionality is exactly the same
• Note: The initialize function has its own window undefined check, so we do not need to repeat that in IonicVue:

  ionic-framework/core/src/global/ionic-global.ts

  Line 17 in 223f36f

  if (typeof (window as any) === 'undefined') { return; }

Does this introduce a breaking change?

• Yes
• No

Other information