proxyequal/dist/es2015/shouldInstrument.js

A proxy based usage tracking and comparison

var _collectionHandlers;

// Based on https://github.com/nx-js/observer-util/blob/master/src/builtIns/index.js
// built-in object can not be wrapped by Proxies, or, to be clear - unfreezed
// their methods expect the object instance as the 'this' instead of the Proxy wrapper
// complex objects are wrapped with a Proxy of instrumented methods
// which switch the proxy to the raw object and to add reactive wiring
var collectionHandlers = (_collectionHandlers = {
  get: true,
  has: true,
  forEach: true,
  keys: true,
  values: true,
  entries: true,
  size: true
}, _collectionHandlers[Symbol.iterator] = true, _collectionHandlers);
var handlers = {
  Map: collectionHandlers,
  Set: collectionHandlers,
  WeakMap: collectionHandlers,
  WeakSet: collectionHandlers,
  Object: false,
  Array: false,
  Int8Array: false,
  Uint8Array: false,
  Uint8ClampedArray: false,
  Int16Array: false,
  Uint16Array: false,
  Int32Array: false,
  Uint32Array: false,
  Float32Array: false,
  Float64Array: false
};
var globalObj = typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : typeof window !== 'undefined' ? window : {};
export function shouldInstrument(_ref) {
  var constructor = _ref.constructor;

  if (!constructor) {
    return true;
  }

  var name = constructor.name;
  var isBuiltIn = typeof constructor === 'function' && name in globalObj && globalObj[name] === constructor;
  return !isBuiltIn || handlers.hasOwnProperty(name);
}
export var getCollectionHandlers = function getCollectionHandlers(_ref2) {
  var constructor = _ref2.constructor;
  return constructor && handlers[constructor.name];
};