preact-dnd/lib/utils/shallowEqual.js

Drag and Drop for Preact (port from React DnD)

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = shallowEqual;
function shallowEqual(objA, objB) {
  if (objA === objB) {
    return true;
  }

  var keysA = Object.keys(objA);
  var keysB = Object.keys(objB);

  if (keysA.length !== keysB.length) {
    return false;
  }

  // Test for A's keys different from B.
  var hasOwn = Object.prototype.hasOwnProperty;
  for (var i = 0; i < keysA.length; i++) {
    if (!hasOwn.call(objB, keysA[i]) || objA[keysA[i]] !== objB[keysA[i]]) {
      return false;
    }

    var valA = objA[keysA[i]];
    var valB = objB[keysA[i]];

    if (valA !== valB) {
      return false;
    }
  }

  return true;
}