[select] Allow spacebar to select elements

[silviuaavram]

• I have followed (at least) the PR section of the contributing guide.

Reuse handleItemClick in the item key down handler for space bar.

Fixes #43874

[code-infra-dashboard]

Deploy preview

https://deploy-preview-48615--material-ui.netlify.app/

Bundle size

Bundle	Parsed size	Gzip size
@mui/material	🔺+168B(+0.03%)	🔺+48B(+0.03%)
@mui/lab	0B(0.00%)	0B(0.00%)
@mui/private-theming	0B(0.00%)	0B(0.00%)
@mui/system	0B(0.00%)	0B(0.00%)
@mui/utils	0B(0.00%)	0B(0.00%)

Details of bundle changes

---

Check out the code infra dashboard for more information about this PR.

[Copilot]

Pull request overview

Restores keyboard interaction for Select so pressing the Space key while an option is focused selects that option (bringing back the behavior from the previously reverted PR).

Changes:

• Refactors the internal “clone event + redefine target” logic into a shared clonedOnChange helper.
• Adds an option-level onKeyDown handler to select/close on Space.
• Adds a regression test covering Space-to-select.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

File	Description
packages/mui-material/src/Select/SelectInput.js	Adds shared clonedOnChange helper and implements Space key handling on options.
packages/mui-material/src/Select/Select.test.js	Adds a regression test asserting Space selects an option.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.

[silviuaavram]

@mj12albert @mnajdova updated the implementation and kept the key down handler, but now I'm triggering event.currentTarget.click so the handler will receive a click event, instead of keyboard.

I can't really do it like in the button base since we already have a preventDefault in keyUp for a close-after-open fix.

        if (event.key === SPACE) {
          // otherwise our MenuItems dispatches a click event
          // it's not behavior of the native <option> and causes
          // the select to close immediately since we open on space keydown
          event.preventDefault();
        }

[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated 1 comment.