react-entities/lib/utils.js

React Entities - the simplest app state management for React

"use strict";

exports.__esModule = true;
exports.shallowEqual = exports.strictEqual = exports.selectNone = exports.selectAll = void 0;

/* Basic selectors */
var selectAll = function selectAll(state) {
  return state;
};

exports.selectAll = selectAll;

var selectNone = function selectNone(_) {
  return null;
};
/* Basic equality functions */


exports.selectNone = selectNone;

var strictEqual = function strictEqual(a, b) {
  return a === b;
};

exports.strictEqual = strictEqual;

var shallowEqual = function shallowEqual(a, b) {
  return strictEqual(a, b) || bothObjects(a, b) && equalProps(a, b);
};

exports.shallowEqual = shallowEqual;

var bothObjects = function bothObjects(a, b) {
  return typeof a === 'object' && a !== null && typeof b === 'object' && b !== null;
};

var equalProps = function equalProps(a, b) {
  var keysOfA = Object.keys(a);
  var keysOfB = Object.keys(b);
  if (keysOfA.length !== keysOfB.length) return false;

  for (var i = 0; i < keysOfA.length; i++) {
    var key = keysOfA[i];
    if (!b.hasOwnProperty(key) || a[key] !== b[key]) return false;
  }

  return true;
};