react-instantsearch-core/dist/cjs/lib/dequal.js

⚡ Lightning-fast search for React, by Algolia

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.dequal = dequal;
function _typeof(o) { "@babel/helpers - typeof"; return _typeof = "function" == typeof Symbol && "symbol" == typeof Symbol.iterator ? function (o) { return typeof o; } : function (o) { return o && "function" == typeof Symbol && o.constructor === Symbol && o !== Symbol.prototype ? "symbol" : typeof o; }, _typeof(o); }
/* eslint-disable complexity */

/*
 * Code taken from dequal/lite v2.0.0
 * https://github.com/lukeed/dequal/blob/9aa73181ac7e081cd330cac67d313632ac04bb02/src/lite.js
 *
 * It adds a 3rd argument `compare(a, b)` that lets execute custom logic to
 * compare values.
 * We use it to skip comparing function references.
 */

// eslint-disable-next-line @typescript-eslint/unbound-method
var has = Object.prototype.hasOwnProperty;
function dequal(foo, bar, compare) {
  // start of custom implementation
  if (compare !== null && compare !== void 0 && compare(foo, bar)) {
    return true;
  }
  // end of custom implementation

  var ctor;
  var len;
  if (foo === bar) return true;
  if (foo && bar && (ctor = foo.constructor) === bar.constructor) {
    if (ctor === Date) return foo.getTime() === bar.getTime();
    if (ctor === RegExp) return foo.toString() === bar.toString();
    if (ctor === Array) {
      if ((len = foo.length) === bar.length) {
        while (len-- && dequal(foo[len], bar[len], compare));
      }
      return len === -1;
    }
    if (!ctor || _typeof(foo) === 'object') {
      len = 0;
      // eslint-disable-next-line guard-for-in, no-restricted-syntax
      for (ctor in foo) {
        if (has.call(foo, ctor) && ++len && !has.call(bar, ctor)) return false;
        if (!(ctor in bar) || !dequal(foo[ctor], bar[ctor], compare)) return false;
      }
      return Object.keys(bar).length === len;
    }
  }

  // eslint-disable-next-line no-self-compare
  return foo !== foo && bar !== bar;
}