redext/dist/memoize.mjs

A simple global store based on React Context and Hooks

// src/memoize.ts
import React from "react";

// src/utils/isEqual.ts
var isArray = Array.isArray;
var keyList = Object.keys;
var hasProp = Object.prototype.hasOwnProperty;
var hasElementType = typeof Element !== "undefined";
function equal(a, b) {
  if (a === b) {
    return true;
  }
  if (a && b && typeof a == "object" && typeof b == "object") {
    const arrA = isArray(a);
    const arrB = isArray(b);
    let length;
    let key;
    if (arrA && arrB) {
      length = a.length;
      if (length !== b.length) {
        return false;
      }
      for (let i = 0; i < length; i++) {
        if (!equal(a[i], b[i])) {
          return false;
        }
      }
      return true;
    }
    if (arrA !== arrB) {
      return false;
    }
    const dateA = a instanceof Date;
    const dateB = b instanceof Date;
    if (dateA !== dateB) {
      return false;
    }
    if (dateA && dateB) {
      return a.getTime() === b.getTime();
    }
    const regexpA = a instanceof RegExp;
    const regexpB = b instanceof RegExp;
    if (regexpA !== regexpB) {
      return false;
    }
    if (regexpA && regexpB) {
      return a.toString() === b.toString();
    }
    const keys = keyList(a);
    length = keys.length;
    if (length !== keyList(b).length)
      return false;
    for (let i = 0; i < length; i++) {
      if (!hasProp.call(b, keys[i])) {
        return false;
      }
    }
    if (hasElementType && a instanceof Element) {
      return false;
    }
    for (let i = 0; i < length; i++) {
      key = keys[i];
      if (key === "_owner" && a.$$typeof) {
        continue;
      } else {
        if (!equal(a[key], b[key])) {
          return false;
        }
      }
    }
    return true;
  }
  return a !== a && b !== b;
}
function exportedEqual(a, b) {
  try {
    return equal(a, b);
  } catch (error) {
    if (error.message && error.message.match(/stack|recursion/i) || error.number === -2146828260) {
      console.warn("Warning: isEqual does not handle circular references.", error.name, error.message);
      return false;
    }
    throw error;
  }
}

// src/memoize.ts
var shallowDiffers = (prev, next) => {
  for (let attribute in prev) {
    if (!(attribute in next)) {
      return true;
    }
  }
  for (let attribute in next) {
    if (!exportedEqual(prev[attribute], next[attribute])) {
      return true;
    }
  }
  return false;
};
var areEqual = (prevProps, nextProps) => {
  const { style: prevStyle, ...prevRest } = prevProps;
  const { style: nextStyle, ...nextRest } = nextProps;
  return !shallowDiffers(prevStyle, nextStyle) && !shallowDiffers(prevRest, nextRest);
};
var memoize = (Component, memoPropsAreEqual = areEqual) => {
  return React.memo(Component, memoPropsAreEqual);
};
var memoize_default = memoize;
export {
  memoize_default as default
};