Upgrade to Typescript 4.4+

[ecraig12345]

According to TS team, 4.4 has "some big perf wins." 4.5 is current as of writing, but we should probably try 4.4 first.

[chrisdholt]

We won't be able to move the Web Components to Typescript v4.4 as part of this due to an issue where lib-dom ARIAMixin value typings changed from string | null to string, essentially making these "non-nullable", which is problematic. This problem was initially raised here: microsoft/TypeScript#45047 and can be seen in the table denoting that a trivial fix is not available for this.

On the heels of this, the Typescript team quickly has provided a feature as of v4.5.0 which allows teams to pin lib-dom versions, which would enable stability between minor versions and allow us to move ahead. Without that, we'll hit build errors due to the typing incompatibilities noted above.

[chrisdholt]

We won't be able to move the Web Components to Typescript v4.4 as part of this due to an issue where lib-dom ARIAMixin value typings changed from string | null to string, essentially making these "non-nullable", which is problematic. This problem was initially raised here: microsoft/TypeScript#45047 and can be seen in the table denoting that a trivial fix is not available for this.

On the heels of this, the Typescript team quickly has provided a feature as of v4.5.0 which allows teams to pin lib-dom versions, which would enable stability between minor versions and allow us to move ahead. Without that, we'll hit build errors due to the typing incompatibilities noted above.

We’ve resolved this - FYI, so we can upgrade any time!

[msft-fluent-ui-bot]

Because this issue has not had activity for over 180 days, we're automatically closing it for house-keeping purposes.

Still require assistance? Please, create a new issue with up-to date details.

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release

[msft-fluent-ui-bot]

🎉This issue was addressed in #27936, which has now been successfully released as @fluentui/[email protected].:tada:

Handy links:

• Release Notes
• Official NPM Release