refun/node/map-with-props-memo.js

A collection of React Hook-enabled functions that compose harmoniously with each other. Similar to `recompose`, but:

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.mapWithPropsMemo = void 0;

var _react = require("react");

var _tsfn = require("tsfn");

var _utils = require("./utils");

const mapWithPropsMemo = (getFn, watchKeys) => props => {
  const prevProps = (0, _react.useRef)(_tsfn.EMPTY_OBJECT);
  const prevResult = (0, _react.useRef)(_tsfn.EMPTY_OBJECT);

  if (prevResult.current === _tsfn.EMPTY_OBJECT || !(0, _utils.shallowEqualByKeys)(prevProps.current, props, watchKeys)) {
    prevProps.current = props;
    prevResult.current = getFn(props);
  }

  return { ...props,
    ...prevResult.current
  };
};

exports.mapWithPropsMemo = mapWithPropsMemo;