StyleX v0.7.3 is now available with a fix to the Rollup plugin, which didn't previously include all the necessary files in the publish to NPM.
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We're excited to release StyleX v0.7.0 with a new CLI to make it easier to get started with StyleX, improvements to variables, and various bug-fixes.
CLI
StyleX relies on a compiler that transforms your JavaScript code and generates a static CSS file. However, integrating this compiler with with your bundler can be tricky. So, while we continue to work on improving the quality of our bundler integrations, we are introducing a new CLI as an alternative!
The CLI transforms an entire folder. It generates an output folder where StyleX has already been compiled away and a static CSS file has been generated. Further, the CLI inserts an import statement for the generated CSS file into each file that uses StyleX.
We are excited to offer this alternative to the bundler-based setup and are choosing to release the CLI in an experimental state. We would love to hear your feedback on how it works for you and what improvements you would like to see.
Special thanks to Joel Austin for his work on the CLI.
Literal names for CSS variables
When using, stylex.defineVars
, StyleX abstracts away the actual CSS variable name,
and lets you use it as a JavaScript reference. Behind the scenes, unique variable names
are generated for each variable.
However, there are scenarios where it is useful to know the exact variable name. For example, when you may want to use the variable in a standalone CSS file.
To address such use-cases, we have updated the stylex.defineVars
API to use literals
that start with --
as is. Other than the keys passed to stylex.defineVars
, the
API is unchanged.
const vars = stylex.defineVars({
'--primary-color': 'red',
'--secondary-color': 'blue',
});
When using literals for variable names, StyleX cannot guarantee uniqueness.
Bug Fixes and improvements
Additionally bug fixes to types, eslint rules and the bundler plugins has been made.
Release 0.6.1
We're excited to release StyleX v0.6.1 with some big improvements for working with CSS custom properties (aka "variables") as well as numerous bug-fixes.
Improvements for variables
We've added some new features and improvements for working with variables and themes in StyleX.
Fallback values for variables
You can now provide a fallback value for variables defined with the stylex.defineVars
API.
This new capability does not introduce any new API. Instead, the existing stylex.firstThatWorks
API
now supports variables as arguments.
import * as stylex from '@stylexjs/stylex';
import {colors} from './tokens.stylex';
const styles = stylex.create({
container: {
color: stylex.firstThatWorks(colors.primary, 'black'),
},
});
Using a list of fallbacks variables is supported.
Typed variables
StyleX introduces a brand new set of APIs for defining <syntax>
types for CSS
variables. This results in @property
rules in the generated CSS output which
can be used to animate CSS variables as well as other special use-cases.
The new stylex.types.*
functions can be used when defining variables to define
them with a particular type.
import * as stylex from '@stylexjs/stylex';
const typedTokens = stylex.defineVars({
bgColor: stylex.types.color<string>({
default: 'cyan',
[DARK]: 'navy',
}),
cornerRadius: stylex.types.length<string | number>({
default: '4px',
'@media (max-width: 600px)': 0,
}),
translucent: stylex.types.number<number>(0.5),
angle: stylex.types.angle<string>('0deg'),
shortAnimation: stylex.types.time<string>('0.5s'),
});
Once variables have been defined with types, they can be animated
with stylex.keyframes
just like any other CSS property.
import * as stylex from '@stylexjs/stylex';
import {typedTokens} from './tokens.stylex';
const rotate = stylex.keyframes({
from: { [typedTokens.angle]: '0deg' },
to: { [typedTokens.angle]: '360deg' },
});
const styles = stylex.create({
gradient: {
backgroundImage: `conic-gradient(from ${tokens.angle}, ...colors)`,
animationName: rotate,
animationDuration: '10s',
animationTimingFunction: 'linear',
animationIterationCount: 'infinite',
},
})
This can be used achieve some interesting effects, such as animating the
angle
of a conic-gradient:
This new capability is primarily about CSS types, but the new API also makes the TypeScript (or Flow) types for the variables more powerful.
As can be seen in the example, generic type arguments can be used to constrain
the values the variable can take when creating themes with stylex.createTheme
.
ESlint plugin
New sort-keys
rule
We've added a new sort-keys
rule to the StyleX ESlint plugin. This rule
is a stylistic rule to enforce a consistent order for keys for your StyleX
styles.
Thanks nedjulius
Improvements to propLimits
for valid-styles
rule.
The valid-styles
rule has been improved to allow more expressive
"prop limits".
Miscellaneous
- ESlint
'valid-styles'
rule now allows using variables created withstylex.defineVars
as keys within dynamic styles. - Bug-fixes to the experimental
stylex.include
API - Fixed debug className generation for
stylex.createTheme
- Units are no longer removed from
0
values - Compilation bug-fixes
Our Ecosystem page continues to grow with community projects. Including a Prettier plugin for sorting StyleX styles.
Release 0.5.0
We're excited to release Stylex v0.5.0 with some big improvements and fixes!
New stylex.attrs
function
The stylex.props
function returns an object with a className
string and a
style
object. Some frameworks may expect class
instead of className
and a
string value for style
.
We are introducing a new stylex.attrs
function so StyleX works well in more
places. stylex.attrs
returns an object with a class
string and a style
string.
New sort-keys
rule for the Eslint plugin
A new @stylexjs/sort-keys
plugin has been introduced which will sort styles
alphabetically and by priority. This will make media query order more
predictable.
Thanks @nedjulius!
New aliases
option for the StyleX Babel plugin
A new aliases
field can be used to configure StyleX to resolve custom aliases
that may be set up in your tsconfig
file. NOTE: StyleX currently needs to
be configured with absolute paths for your aliases.
Thanks @rayan1810!
New Esbuild plugin
A new official plugin for Esbuild has been introduced as
@stylexjs/esbuild-plugin
.
Thanks @nedjulius!
Other Enhancements
- Configuration options passed to the StyleX Babel plugin will now be validated.
- The
@stylexjs/stylex
now has ESM exports alongside the commonJS exports. - The ESLint
valid-styles
rule will catch when using empty strings as string values.
Bug Fixes
- Some CSS properties which previously caused type and lint errors will now be accepted.
- Using variables for
opacity
will no longer cause type errors. - Using
stylex.keyframes
withinstylex.defineVars
will now work correctly runtimeInjection
will correctly be handled- Setting the value of variables from
defineVars
as dynamic styles will now work correctly. - Usage of
0px
within CSS functions will no longer be simplified to a unit-less0
as this doesn't work in certain cases. - Spaces around CSS operators will be maintained.
In addition to these, we've added an "Ecosystem" page to our website to highlight various community projects around StyleX.
Release 0.4.1
Three weeks ago, we open-sourced StyleX. Since then, we've been diligently fixing bugs and making improvements. Here are some of the highlights:
Enhancements
- The amount of JavaScript generated after compilation has been further reduced.
- Added support for some previously missing CSS properties to the ESLint plugin.
- Added support for using variables in
stylex.keyframes
. - Removed the code for style injection from the production runtime, reducing the size of the runtime by over 50%.
- Added Flow and TypeScript types for the Rollup Plugin.
- Added the option to use CSS Layers in all bundler plugins.
- TypeScript will now auto-complete style property names.
- Bundler plugins will now skip files that don't contain StyleX, resulting in faster build times.
Bug Fixes
- Fixed a bug where the ESLint plugin was sometimes unable to resolve local constants used for Media Queries and Pseudo Classes.
- Resolved a bug where the runtime injection of styles in dev mode would sometimes fail.
- Addressed a bug where styles injected at runtime during development would sometimes suffer from specificity conflicts.
- The TypeScript types for
Theme
will now correctly throw an error when applying a theme for the wrongVarGroup
.
In addition to these, we've made other improvements to the types and documentation. I want to extend my gratitude to all the contributors for their pull requests. ♥️
Happy New Year!