Bug Description

The expand/collapse functionality of the panel doesn’t follow the general action triggering and canceling behavior found in other components, like the button.

Some issues can be reproduced using the component’s Basic Sample:

1. Expand/collapse the panel using the enter key:
   • Focus the panel header.
   • Press down and hold the enter key.
   • Actual:
     • Windows: The panel starts continuously expanding and collapsing as long as the user presses down the enter key.
     • macOS: The panel only expands/collapses once after releasing the enter key.
   • Expected: The panel expands/collapses once as soon as pressing down the enter key.
2. Cancel expanding/collapsing the panel using the spacebar, shift, and esc keys:
   • Focus the panel header.
   • Press down and hold the spacebar.
   • Press the esc or shift key.
   • Release the spacebar.
   • Actual:
     • Windows: The panel expands/collapses as soon as pressing the esc or shift key.
     • macOS: The panel expands/collapses after releasing the spacebar.
   • Expected: The panel does not change its expanded/collapsed state.

Other issues can be reproduced using the component’s Custom Header sample:

1. Expand/collapse the panel using the enter key:
   • Focus the icon button in the panel header.
   • Press down and hold the enter key.
   • Actual:
     • Windows: The panel starts continuously expanding and collapsing as long as the user presses down the enter key.
     • macOS: The panel only expands/collapses once after releasing the enter key.
   • Expected: The panel expands/collapses as soon as pressing down the enter key.
2. Cancel expanding/collapsing the panel using the spacebar, shift, and esc keys:
   • Focus the icon button in the panel header.
   • Press down and hold the spacebar.
   • Press the esc or shift key.
   • Release the spacebar.
   • Actual: The panel expands/collapses.
     • Windows: The panel expands/collapses as soon as pressing the esc or shift key.
     • macOS: The panel expands/collapses after releasing the spacebar.
   • Expected: The panel does not change its expanded/collapsed state.

Affected Component

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Expected Behaviour

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Isolated Example

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Steps to Reproduce

...

Log Output, Stack Trace or Screenshots

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Priority

None

UI5 Web Components Version

2.16.2

Browser

Edge

Operating System

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Additional Context

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Organization

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Declaration

• I’m not disclosing any internal or sensitive information.