@mui/system/esm/compose/compose.js

MUI System is a set of CSS utilities to help you build custom designs more efficiently. It makes it possible to rapidly lay out custom designs.

import merge from "../merge/index.js";
function compose(...styles) {
  const handlers = styles.reduce((acc, style) => {
    style.filterProps.forEach(prop => {
      acc[prop] = style;
    });
    return acc;
  }, {});

  // false positive
  // eslint-disable-next-line react/function-component-definition
  const fn = props => {
    return Object.keys(props).reduce((acc, prop) => {
      if (handlers[prop]) {
        return merge(acc, handlers[prop](props));
      }
      return acc;
    }, {});
  };
  fn.propTypes = process.env.NODE_ENV !== 'production' ? styles.reduce((acc, style) => Object.assign(acc, style.propTypes), {}) : {};
  fn.filterProps = styles.reduce((acc, style) => acc.concat(style.filterProps), []);
  return fn;
}
export default compose;