Fix inconsistent Enter key behavior in Textbox for multiline inputs

[Khushi-Roy-123]

Problem

Enter key does not trigger submit for multiline Textbox (lines > 1), while Shift+Enter does.

Cause

Conditional logic in handle_keypress restricts Enter submission to single-line inputs.

Fix

• Make Enter always trigger submit
• Preserve Shift+Enter for newline behavior

Result

Consistent behavior across all Textbox configurations.

Fixes #13354

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Note

Medium Risk
Changes core Textbox key handling so plain Enter always triggers onsubmit, which may alter UX for multiline textareas and affect flows that previously relied on Enter inserting a newline.

Overview
Unifies Textbox Enter key behavior by simplifying handle_keypress: plain Enter now always prevents default and calls onsubmit, regardless of lines/max_lines settings.

Shift+Enter is preserved for inserting a newline, and the component still calls oninput after key handling.

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Cursor Bugbot has reviewed your changes and found 2 potential issues.

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[cursor]

Function body indentation is incorrect and inconsistent

Low Severity

The handle_keypress function body is indented at the same level as the function declaration (1 tab), and the closing brace is at 0 tabs. Every sibling function (handle_select, handle_scroll, etc.) has its body at 2 tabs and closing brace at 1 tab. This makes the code visually appear to close at the module level rather than the <script> block level.

 

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[Khushi-Roy-123]

I’ve updated the handler to ensure:

• oninput is always triggered (even on Shift+Enter in multiline)
• Enter behavior remains consistent across input types

Also aligned indentation with surrounding code style.

Pushing updates soon

[Khushi-Roy-123]

Update pushed with clean implementation.

This change ensures:

• Enter consistently triggers submit
• Shift+Enter preserves newline behavior
• oninput is always triggered

Happy to adjust if a different UX direction is preferred.