Mar 30, 2019

A big thanks to the 20 contributors who made this release possible!

Here are some highlights ✨:

• 🔥 Many new TypeScript & hook demos @eluchsinger, @sperry94, @Dudrie.
• 🎀 5 more core components migrated from Classes to Hooks @joshwooding.
• ⚛️ A simpler server-side rendering API (#15030).
• 💅 Better typography defaults (#15100) @oliviertassinari
• And many more 🐛 bug fixes and 💄 improvements.

@material-ui/core@v4.0.0-alpha.6

Breaking changes

• [Typography] Better defaults (#15100) @oliviertassinari

  • Change the default variant from body2 to body1. A font size of 16px is a better default than 14px. Bootstrap, material.io, and even our documentation use 16px as the default font size. 14px like Ant Design is understandable as Chinese users have a different alphabet. We document 12px as the default font size for Japanese.
  • Remove the default color from the typography variants. The color should inherit most of the time. It's the default behavior of the web.
  • Rename color="default" to color="initial" following the logic of #13028. The use of default should be avoided, it lacks semantic meaning.

• [Container] Move to the core (#15062) @oliviertassinari

Changes

• [Box] Use the default theme (#15019) @apanizo
• [SwipeableDrawer] Ignore open swipe if it didn't start on the swipe area (#15045) @leMaik
• [Divider] Enable component generic props (#15040) @StevenGodin
• [ListItem] Add type test for button prop (#15049) @eps1lon
• [Button] Fix typing for type-attribute (#15077) @karlbohlmark
• [RadioGroup] Remove cloneElement, use the context (#15069) @oliviertassinari
• [Popover] Add warning to Popover if anchorRef is not visible (#15090) @alexmironof
• [MobileStepper] Support variant "text" (#15108) @AcidRaZor
• [Tabs] Update so that tabs keep equal widths (#15114) @sosaucily

@material-ui/styles@v4.0.0-alpha.6

• [styles] Fix IE 11 issue (#15034) @oliviertassinari
• [styles] Use the hook directly in styled() (#15029) @oliviertassinari
• [styles] Add a new injectFirst prop (#15028) @oliviertassinari
• [styles] Go back to index counter (#15044) @oliviertassinari
• [styles] Server-side rendering API (#15030) @oliviertassinari
• [styled] Correct doc and typings for styled with theme (#15004) @sveyret

@material-ui/lab@v4.0.0-alpha.6

• [Slider] Fix onChange not being fired on single touch (#14998) @ahockersten

Docs

• [docs] Add keyframes in the v3 -> v4 upgrade guide (#15039) @oliviertassinari
• [docs] Migrate one demo to the hooks (#15031) @oliviertassinari
• [docs] Add TypeScript demos for Dividers (#15037) @eluchsinger
• [docs] Add Chip TypeScript demo for Chip array (#15050) @sperry94
• [docs] Add MQTT Explorer to showcases (#15033) @thomasnordquist
• [docs] Fix CustomizedTabs demo (#15065) @HaNdTriX
• [docs] Add a new site to showcase (learnseeker) (#15064) @ravishwetha
• [docs] Add Tabs TypeScript demo (#15053) @sperry94
• [docs] Migrate docs' badge page to hooks (#15109) @apanizo
• [docs] Migrate docs' buttons page to hooks (#15110) @apanizo
• [docs] Add Pickers TypeScript demos (#15103) @sperry94
• [docs] Migrate Avatar demo page to the hooks (#15116) @rick-mo
• [docs] Add Snackbars TypeScript Demos (#15087) @sperry94
• [docs] Add Tooltip TypeScript demos (#15061) @Dudrie

Core

• [ToggleButtonGroup] Convert to function component (#15025) @joshwooding
• [ToggleButton] Convert to function component (#14965) @joshwooding
• [Fade] Convert to function component (#15027) @joshwooding
• [performance] Add live pages (#15046) @oliviertassinari
• [ExpansionPanelSummary] Convert to function component (#15043) @joshwooding
• [test] Add conformance suite (#14958) @eps1lon
• [Menu] Convert to function component (#15068) @joshwooding
• [test] Update enzyme (#14987) @eps1lon
• [core] Batch of fixes (#15115) @oliviertassinari