@fruits-chain/react-native-xiaoshu/lib/module/theme/width-style.js

React Native UI library

const StyleMap = new Map();
export const widthStyle = (vars, creator) => {
  let myStyle;

  for (let [key, value] of StyleMap) {
    if (key[1] === creator) {
      if (key[0] === vars) {
        myStyle = value;
      } else {
        StyleMap.delete(key);
      }
    }
  }

  if (!myStyle) {
    myStyle = creator(vars);
    StyleMap.set([vars, creator], myStyle);
  }

  return myStyle;
};
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