fluentui Virtualizer: ScrollTo hooks & callbacks

New Behavior

ScrollTo hooks for scrolling animated or instantly to a specific item index Callback for when a flagged index has been rendered Optional isScrolling flag available in the child render function for users to render lightweight placeholders

Related Issue(s)

https://github.com/microsoft/fluentui/issues/27217 https://github.com/microsoft/fluentui/issues/27218 https://github.com/microsoft/fluentui/issues/27219

May 16 '23 16:05 Mitch-At-Work

Perf Analysis (`@fluentui/react-components`)

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
FluentProviderWithTheme	mount	78	85	10	Possible regression
InfoButton	mount	17	16	5000	Possible regression

All results

Scenario	Render type	Master Ticks	PR Ticks	Iterations	Status
Avatar	mount	578	580	5000
Button	mount	284	298	5000
Field	mount	1009	1052	5000
FluentProvider	mount	663	666	5000
FluentProviderWithTheme	mount	78	85	10	Possible regression
FluentProviderWithTheme	virtual-rerender	84	70	10
FluentProviderWithTheme	virtual-rerender-with-unmount	87	83	10
InfoButton	mount	17	16	5000	Possible regression
MakeStyles	mount	860	843	50000
Persona	mount	1598	1542	5000
SpinButton	mount	1256	1288	5000

May 16 '23 17:05 fabricteam

This pull request is automatically built and testable in CodeSandbox.

To see build info of the built libraries, click here or the icon next to each commit SHA.

Latest deployment of this branch, based on commit 4e32934017be878e9b4721deb2b4d31e7b04c39d:

Sandbox	Source
@fluentui/react 8 starter	Configuration
@fluentui/react-components 9 starter	Configuration

May 16 '23 17:05 codesandbox-ci[bot]

📊 Bundle size report

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
`react-components` react-components: Button, FluentProvider & webLightTheme	`64.935 kB` `17.918 kB`
`react-components` react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	`211.151 kB` `58.715 kB`
`react-components` react-components: FluentProvider & webLightTheme	`36.168 kB` `11.964 kB`
`react-portal-compat` PortalCompatProvider	`6.473 kB` `2.196 kB`

_{🤖 This report was generated against 1acc2cdf9ab63707eb26d656fca5161680df42c5}

May 16 '23 17:05 fabricteam

Asset size changes

Size Auditor did not detect a change in bundle size for any component!

Baseline commit: 1acc2cdf9ab63707eb26d656fca5161680df42c5 (build)