linkedstate/dist/isEqual.js

Context alternative for react. Link multiple states within components using a unique key, and set them/update them globally.

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = isEqual;

//Fast, generic, early exiting deep object comparitor with no dependencies.
var getSimpleComparitor = comparitor => ["string", "number", "boolean"].includes(typeof comparitor);

function isEqual(compareFrom, compareTo) {
  if (typeof compareTo === "undefined" && typeof compareFrom !== "undefined") return false;
  if (typeof compareFrom === "undefined" && typeof compareTo !== "undefined") return false;
  if (typeof compareFrom !== typeof compareTo) return false;
  if (typeof compareFrom === "undefined" && typeof compareTo === "undefined") return true;

  if (getSimpleComparitor(compareFrom)) {
    return JSON.stringify(compareFrom) === JSON.stringify(compareTo);
  }

  if (Array.isArray(compareFrom)) {
    if (compareFrom.length !== compareTo.length) return false;
    var arrayReturn = true;

    for (var i = 0; i < compareFrom.length; i++) {
      if (!isEqual(compareFrom[i], compareTo[i])) {
        arrayReturn = false;
        break;
      }
    }

    return arrayReturn;
  }

  if (typeof compareFrom === "object") {
    if (Object.keys(compareFrom).length !== Object.keys(compareTo).length) return false;
    var objectReturn = true;

    for (var key of Object.keys(compareFrom)) {
      if (!(key in compareTo)) {
        objectReturn = false;
        break;
      }

      if (!isEqual(compareTo[key], compareFrom[key])) {
        objectReturn = false;
        break;
      }
    }

    return objectReturn;
  }
}