es5triv.js

Object.defineProperties(Object, {
  seal: {
    configurable: true,
    enumerable: false,
    value: function (object) {
      var properties = Object.getOwnPropertyNames(object);
      properties.forEach(function (name) {
        var desc = Object.getOwnPropertyDescriptor(object, name);
        desc.configurable = false;
        Object.defineProperty(object, name, desc);
      });
    },
    writable: false
  },
  
  isSealed: {
    configurable: true,
    enumerable: false,
    value: function (object) {
      var properties = Object.getOwnPropertyNames(object);
      return properties.every(function (name) {
        var desc = Object.getOwnPropertyDescriptor(object, name);
        return !decs.configurable;
      });
    },
    writable: false
  },
  
  freeze: {
    configurable: true,
    enumerable: false,
    value: function (object) {
      var properties = Object.getOwnPropertyNames(object);
      properties.forEach(function (name) {
        var desc = Object.getOwnPropertyDescriptor(object, name);
        if ("value" in desc) {
          desc.writable = false;
        }
        desc.configurable = false;
        Object.defineProperty(object, name, desc);
      });
    },
    writable: false
  },
  
  isFrozen: {
    configurable: true,
    enumerable: false,
    value: function (object) {
      var properties = Object.getOwnPropertyNames(object);
      return properties.every(function (name) {
        var desc = Object.getOwnPropertyDescriptor(object, name);
        return !(desc.configurable || "value" in desc && desc.writable);
      });
    },
    writable: false
  }
});