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Migration Guides

v0.6

What's New

  • Styled components dict was renamed to Themed to avoid confusion with styled components constructors from @emotion/styled and similar libraries.

  • theme.useRootStyles configuration option (false by default). Set it to true to add styles.root to html instead of body.

    • theme.useBodyStyles configuration option still defaults to true, but it's going in to be deprecated in favor of theme.useRootStyles in the future.

  • New scale: transitions supporting transition CSS property. Issue #1079, PR #1272

  • Objects in nested scales can now have a __default key. PR #951

    Given the theme

    const theme = {
      colors: {
        primary: {
          __default: '#00f',
          light: '#33f',
        }
      }
    }

    color: 'primary' resolves to color: '#00f'.

  • Configuration option for printing color mode. PR #1267, issue #1144. No more wasted ink.

    {
      initialColorModeName: "dark",
      printColorModeName: "light"
    }

  • A new component, Paragraph was added in PR #1298

Breaking Changes

  • Theme UI 0.6 depends on Emotion 11, and isn't compatible with Emotion 10 anymore.

    • If you didn't install Emotion separately, this update shouldn't affect you.
    • If your other dependencies depend on Emotion 10, and have no published versions for Emotion 11, you can use Yarn resolutions or Webpack's resolve.alias to enforce a version.

    Refer to Emotion 11 release notes for more information.

  • Color mode flash on first render is gone, but to achieve this we had to bring back theme.rawColors.

    • You can no longer read raw color values from theme.colors when reading theme from useThemeUI or inside sx.
    • .colors object contains Custom CSS Properties now.
    • If you need to pass original value somewhere where CSS Properties (e.g. WebGL Canvas) won't work use .rawColors.

    How to migrate?

    Find places where you read colors from the useThemeUI and extract rawColors instead of colors.

    const { rawColors: colors } = useThemeUI().theme

  • Default color mode name is no longer "default" — it's now undefined, what represents the lack of color mode set by user or detected from preferences.

  • useColorSchemeMediaQuery defaults to true. Issue #624, PR #1373

    How to migrate? Add useColorSchemeMediaQuery: false to your theme if you don't have this property. Read more in the docs.

  • We no longer export internal React context named as Context 😅 It wasn't and it's still not public API, but if you used it and you really need it, you can grab it as __ThemeUIContext. (But please don't do this. Use ThemeProvider from @theme-ui/core for local theme overrides instead.)

Deprecations

  • Styled will be removed in v0.7. Use Themed instead.
  • useBodyStyles will be removed in v0.7. Use useRootStyles instead.

TypeScript Changes

Theme UI is now written in TypeScript, and the emitted types differ from @types/theme-ui.

  • false in now accepted in responsive tuple types. PR #1499

  • Known colors (primary, text, background, accent, secondary) in ColorMode can now be nested scales.

    The following no longer typechecks, as colors.primary can be an object.

    sx={{
      color: theme => theme.colors?.primary?.toUpperCase()
    }}

    But the following code still works.

    sx={{
      color: theme => theme.colors?.primary
    }}

    If colors.primary is an object, colors.primary.__default is used.

  • false values are skipped before passing style objects to Emotion. Issue #1297, PR #1460.

    The following syntax is now supported

    sx={{ color: isActive && blue }}

  • "as" prop on Themed.X components now properly opts out of typechecking

    • TypeScript users, don't use ComponentProps<typeof Themed['div']>, import ThemedComponent and use ThemedComponent<'div'> instead.

  • Theme UI 0.6 depends on csstype v3 instead of csstype v2.

  • Renamed types

    • Anything copied from styled-system types was renamed or removed.
    • SxProps was renamed to SxProp.
    • SxStyleProp, an alias for ThemeUIStyleObject was removed. Use ThemeUIStyleObject instead.

Refer to the changelog for a full list of changes.

v0.3

What's New

  • Components can now be imported directly from the theme-ui package. Be sure that treeshaking is enabled with your build tool.
  • Includes smart defaults for adding base styles to the <body> element.
  • Simplified color modes API.
  • New @theme-ui/css, @theme-ui/core, @theme-ui/color-modes, and @theme-ui/mdx packages allow for more bespoke ways to use the library.

Breaking Changes

  • @emotion/react and @mdx-js/react are now dependencies of theme-ui and should not be installed separately. If you'd like to use a particular version of each library, use Yarn resolutions.
  • Theme UI context no longer provides context.components. If you're using this object from context, use the MDX hook instead. E.g. import { useMDXComponents } from '@mdx-js/react'
  • If you'd like color mode to be initialized from the prefers-color-scheme media query, you must enable the useColorSchemeMediaQuery: true flag in your theme.
  • The ColorMode component is deprecated and no longer required to add color styles to the <body> element.
  • The following components have been removed in favor of using Box and Flex components: Layout, Header, Main, Footer
  • The initialColorMode flag no longer works, use initialColorModeName instead.
  • The ThemeProvider now adds global typographic styles to the <body> element based on theme.styles.root. To disable this behavior set the useBodyStyles: false flag in your theme.
  • Theme context is now stateless. If you've made use of context.setTheme, this no longer works. An alternative approach is available with the @theme-ui/editor package.
  • The ThemeStateProvider component is no longer avialable, see @theme-ui/editor as an alternative.
  • The @theme-ui/editor package has a completely new API. Please refer to the package's README.md for more information.

v0.2

JSX Pragma

If you were using the Theme UI custom JSX pragma, rename the css prop to sx. This does not apply if you were importing and using the css utility function manually.

theme-ui-typography

If you were using the theme-ui-typography package, install the new package named @theme-ui/typography instead. The toStyle API is no longer included. Use the toTheme API instead, see the Typography.js docs for how to use this utility.

Box and layout component

If you were using Styled System style props on the Box component or any other layout component, replace these props with either the sx prop or by using the css utility.

Other

  • Replace ColorModeProvider and ComponentProvider with the ThemeProvider component.
  • The @emotion/styled package is no longer required for Theme UI. If you are not using it directly in your application, you can remove it from your dependencies.
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