fix: chromium interrupt IME when moving cursor

[WindRunnerMax]

Description
I found an issue in Chromium: when a node (A) is set to contenteditable=false and is followed by a text node (B), activating the IME between A and B and then holding the left arrow key to adjust input causes the IME to disappear and leads to unexpected state issues, such as composition events.

This problem does not occur in Firefox and Safari, only in browsers with the Chromium engine.

This issue is also mentioned in #3490 (comment).

Issue
Fixes: #3490 (comment)

Example
The current issues.

After making adjustments.

Context
Here's the minimal demo for this issue: when you activate the IME before the "!" character and then hold the left arrow key, the input method gets interrupted and disappears.

<div contenteditable="true"><span contenteditable="false" style="background: #eee;">Void</span><span>!</span></div>

To fix this issue, you need to create the following DOM structure. The key is that the outer span tag has a display:inline-block style, and the child div tag has a contenteditable=false attribute. This is magic.

<div contenteditable="true"><span contenteditable="false" style="background: #eee; display: inline-block;"><div contenteditable="false">Void</div></span><span>!</span></div>

Checks

• The new code matches the existing patterns and styles.
• The tests pass with yarn test.
• The linter passes with yarn lint. (Fix errors with yarn fix.)
• The relevant examples still work. (Run examples with yarn start.)
• You've added a changeset if changing functionality. (Add one with yarn changeset add.)

[changeset-bot]

⚠️ No Changeset found

Latest commit: f18a43f

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[dylans]

Thanks @WindRunnerMax !