Comment creation fails in Safari <17.4: Missing checkVisibility function

[Amerlander]

Bug Report

Summary

In Safari versions below 17.4, creating a comment in blank space (not linked to a block) does not work. This issue is likely caused by the checkVisibility function, which is unavailable in earlier Safari versions (pre-17.4), released before March 5, 2024. Reference: CanIUse.

Steps to Reproduce

1. Open Safari (version below 17.4)
2. Visit MakeCode Microbit Editor
3. Attempt to add a comment on blank space (not attached to a block)
4. Observe that only a trash icon appears instead of a comment field

Screenshot:

Expected Behavior

A complete comment field should appear instead of just the trash icon.

Expected Screenshot:

Environment

• OS: macOS
• Browser: Safari
• Version: 16.6 (18615.3.12.11.2)

Additional Information

• Issue occurs on both makecode.microbit.org and makecode.calliope.cc

Console Error:

[Error] TypeError: this.foldoutIcon.checkVisibility is not a function. (In 'this.foldoutIcon.checkVisibility()', 'this.foldoutIcon.checkVisibility' is undefined)
    calcMinSize (main.js:7:178205)
    setSize (main.js:7:177588)
    yc (main.js:7:175954)
    Ku (main.js:7:211726)
    callback (main.js:7:124434)
    (anonymous function) (main.js:7:77740)