Backspacing across lines on Android is broken

Specifically, when there is a gutter, trying to backspace at the start of the line removes the virtual keyboard and does nothing.

The issue appears to be a mobile Chrome bug which, in this HTML (which is a simplification of what CodeMirror creates when there is a gutter)

<div contenteditable=true>
  <pre>foo</pre>
  <div contenteditable="false">(gutter)</div>
  <pre>bar</pre>
</div>

if you put the cursor before ‘bar’ and press backspace, the document isn’t changed, but the selection is moved into the non-editable div, and thus the virtual keyboard disappears.

[ZhennanWu]

Just here to confirm the state of this issue. As @edemaine has pointed out, if you delete across lines, then the keyboard will disappear and reopen.

Such behavior has been confirmed with Android P + Chrome 71.0.3578.99 (latest as of Dec/25/2018) + Gboard/Swiftkey

Gboard version: 7.8.7.224352916 Updated on Dec 10 2018 SwiftKey version: 7.1.9.24 Updated on Dec 5 2018

(Strangely enough, Hacker’s Keyboard works fine.)

The impact of this behavior: makes continuous backspacing across multiple lines impossible, because it always will be interrupted at every line break. After each interruption, you have to release and re-press the button, otherwise the closed-and-reopened keyboard won’t react anymore.

Is such behavior going to be fixed or a wontfix?

[edemaine]

Hmm, I just tested again on the codemirror.net demos, and I concur: it seems to work fine now. Specifically, when backspacing at the beginning of a line, the keyboard disappears briefly, but comes back.

There may have been a SwiftKey update recently that fixed this. Anyway, I think you can close the issue again. Sorry for the hassle!