@storm-stack/hooks/dist/use-memo-stable.cjs

A collection of React hooks used by Storm Software in various client libraries and applications.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.useMemoStable = useMemoStable;
var _react = require("react");
const areInputsEqual = (newInputs, lastInputs) => {
  if (newInputs.length !== lastInputs.length) {
    return false;
  }
  for (const [i, newInput] of newInputs.entries()) {
    if (newInput !== lastInputs[i]) {
      return false;
    }
  }
  return true;
};
function useMemoStable(getResult, inputs) {
  const initial = (0, _react.useState)(() => ({
    inputs,
    result: getResult()
  }))[0];
  const isFirstRun = (0, _react.useRef)(true);
  const committed = (0, _react.useRef)(initial);
  const useCache = isFirstRun.current || Boolean(inputs && committed.current.inputs && areInputsEqual(inputs, committed.current.inputs));
  const cache = useCache ? committed.current : {
    inputs,
    result: getResult()
  };
  (0, _react.useEffect)(() => {
    isFirstRun.current = false;
    committed.current = cache;
  }, [cache]);
  return cache.result;
}