rn-variant/dist/index.mjs

Light-weight, type-safe style variants for React Native.

// src/create-variant.ts
import { StyleSheet } from "react-native";
function createVariantStyles(config) {
  const { base = {}, variants, compoundVariants = [] } = config;
  const styleMap = {};
  for (const variantKey in variants) {
    styleMap[variantKey] = {};
    for (const optionKey in variants[variantKey]) {
      styleMap[variantKey][optionKey] = StyleSheet.create({
        style: variants[variantKey][optionKey]
      });
    }
  }
  function useVariants(input) {
    const selected = [base];
    for (const variantKey in input) {
      const value = input[variantKey];
      if (value !== void 0 && value !== null) {
        let resolvedValue;
        if (typeof value === "boolean") {
          resolvedValue = value.toString();
        } else {
          resolvedValue = value;
        }
        if (styleMap[variantKey]?.[resolvedValue]) {
          selected.push(styleMap[variantKey][resolvedValue].style);
        }
      }
    }
    compoundVariants.forEach(({ variants: compound, style }) => {
      const isMatch = Object.entries(compound).every(([key, value]) => {
        const inputValue = input[key];
        const compoundValue = value;
        if (typeof inputValue === "boolean") {
          return inputValue.toString() === compoundValue;
        }
        return inputValue === compoundValue;
      });
      if (isMatch) {
        selected.push(style);
      }
    });
    return {
      style: StyleSheet.flatten(selected)
    };
  }
  return {
    styles: styleMap,
    useVariants
  };
}
export {
  createVariantStyles
};