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babel-plugin-react-native-class-prop

v0.1.3

Published

Babel plugin to transpile class prop

Downloads

12

Readme

babel-plugin-react-native-class-prop

Are you tired of defining same styles across your project? This snippet look known to You?

const styles = StyleSheet.create({
  container: {
    flex: 1
  }
})

babel-plugin-react-native-class-prop enables defining collection of global styles that can be used anywhere in project via class props. This plugin recreates way of using global styles as on the web.

Usage

Install the plugin:

yarn add --dev babel-plugin-react-native-class-prop

or

npm install --save-dev babel-plugin-react-native-class-prop

Then include it in your .babelrc or babel.config.js:

{
  "plugins": ["react-native-class-prop", {
    classes: {
      flex: {
        flex: 1
      },
      'justify-center': {
        justifyContent: 'center'
      }
    }
  }]
}

Example

Now you can use the class prop in your components:

function App(props) {
  return (
    <View
      class="flex justify-center"
    >
      Hello world
    </View>
  );
}

If class should be applied conditionally this plugin supports syntax similar to classnames package:

function App(props) {
  return (
    <View
      class={["flex", { "justify-center": props.center }]}
    >
      Hello world
    </View>
  );
}

Sometimes if You just need to pass some class definitions as prop to sub component evaluateClass function do the job.

import { evaluateClass } from 'babel-plugin-react-native-class-prop';

function App(props) {
  return (
    <Paragraph
      passClassToSubComponent={evaluateClass('flex')}
    >
      Hello world
    </Paragraph>
  );
}

Using class prop does not mean You shouldn't use old way, the style prop. These two props should be used in combination. style prop should be used for styles that are not addded to babel configuration file, or they are just defined in runtime, computed in render method...

Babel plugin options

  • propName: Default value is class. But if You want to use something more appropriate for your needs it can be changed here.
  • classes: Object that contain global classes definitions. It has same format as any style created with StyleSheet.create. Bare in mind that babel uses older JS syntax for configuration file and at this step babel plugins are not applied to project files.

Classes are not working

Please restart react-native packager with npm start -- --reset-cache command. Sometimes when new classes are added packager still use cached ones.

TODO

  • error handling for unsupported cases
  • support robust cases
  • typescript types
  • semantic release