4.0.0 brings lots of cleanup, a few features, and minimal breaking changes. RMWC remains committed having as few breaking changes between releases as possible.

Updates!

• The Select got a major overhaul and now includes leading icons and an "enhanced" variant that allows you to render the dropdown using a non-native menu.
• Dialogs now include an onStateChange prop which allows you to hook into the opening / closing lifecycle.
• Bugfixes for Switch and Radios
• Contriubtion docs have been updated at the request of people in the community to help get going on giving back

Breaking Changes Chips were heavily refactored to simplify the implementation for consumers and handle events better. This is likely the only breaking change you'll have to pay attention to. Older versions of RMWC used an apiRef prop to gain access to the vanilla JS material-components-web api. Since the vanilla JS components are no longer used, this prop no longer makes sense and has been removed.