From c52a604c4e21b9ccf5925faef40eeb5758099e91 Mon Sep 17 00:00:00 2001
From: toxic-johann <353904974@qq.com>
Date: Sat, 5 Aug 2017 22:29:23 +0800
Subject: [PATCH] [build] 0.3.7 what: why: how:

---
 lib/toxic-decorators.browser.js | 336 +++++++++++++++++---------------
 lib/toxic-decorators.js         | 121 ++++++------
 lib/toxic-decorators.min.js     |   2 +-
 lib/toxic-decorators.mjs        | 121 ++++++------
 package.json                    |   2 +-
 5 files changed, 286 insertions(+), 296 deletions(-)

diff --git a/lib/toxic-decorators.browser.js b/lib/toxic-decorators.browser.js
index eb678e2..6b20ec3 100644
--- a/lib/toxic-decorators.browser.js
+++ b/lib/toxic-decorators.browser.js
@@ -1,6 +1,6 @@
 
 /**
- * toxic-decorators v0.3.6
+ * toxic-decorators v0.3.7
  * (c) 2017 toxic-johann
  * Released under GPL-3.0
  */
@@ -1355,6 +1355,125 @@ function getDeepProperty(obj, keys) {
   return target;
 }
 
+var _typeof$1 = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) {
+  return typeof obj;
+} : function (obj) {
+  return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+};
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+var defineProperty$1 = function (obj, key, value) {
+  if (key in obj) {
+    Object.defineProperty(obj, key, {
+      value: value,
+      enumerable: true,
+      configurable: true,
+      writable: true
+    });
+  } else {
+    obj[key] = value;
+  }
+
+  return obj;
+};
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+var slicedToArray = function () {
+  function sliceIterator(arr, i) {
+    var _arr = [];
+    var _n = true;
+    var _d = false;
+    var _e = undefined;
+
+    try {
+      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
+        _arr.push(_s.value);
+
+        if (i && _arr.length === i) break;
+      }
+    } catch (err) {
+      _d = true;
+      _e = err;
+    } finally {
+      try {
+        if (!_n && _i["return"]) _i["return"]();
+      } finally {
+        if (_d) throw _e;
+      }
+    }
+
+    return _arr;
+  }
+
+  return function (arr, i) {
+    if (Array.isArray(arr)) {
+      return arr;
+    } else if (Symbol.iterator in Object(arr)) {
+      return sliceIterator(arr, i);
+    } else {
+      throw new TypeError("Invalid attempt to destructure non-iterable instance");
+    }
+  };
+}();
+
+
+
+
+
+
+
+
+
+
+
+
+
+var toConsumableArray$1 = function (arr) {
+  if (Array.isArray(arr)) {
+    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
+
+    return arr2;
+  } else {
+    return Array.from(arr);
+  }
+};
+
 var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
 // **********************  对象操作  ************************
 /**
@@ -1410,7 +1529,7 @@ function isInitializerDescriptor(desc) {
  * @param {string} key
  */
 function createDefaultSetter(key) {
-  return function set(newValue) {
+  return function set$$1(newValue) {
     Object.defineProperty(this, key, {
       configurable: true,
       writable: true,
@@ -1451,13 +1570,10 @@ function compressOneArgFnArray(fns) {
  * @param {anything} args
  */
 function warn() {
-  var _console2, _console3;
+  var _console, _console2;
 
-  var _console = console,
-      warn = _console.warn;
-
-  if (isFunction(warn)) return (_console2 = console).warn.apply(_console2, arguments);
-  (_console3 = console).log.apply(_console3, arguments);
+  if (isFunction(console.warn)) return (_console = console).warn.apply(_console, arguments);
+  (_console2 = console).log.apply(_console2, arguments);
 }
 
 function getOwnKeysFn() {
@@ -1489,9 +1605,9 @@ function compressMultipleDecorators() {
     fns[_key] = arguments[_key];
   }
 
-  var fnOnlyErrorMsg = 'compressMultipleDecorators only accept function';
+  if (!fns.length) throw new TypeError('You must pass in decorators in compressMultipleDecorators');
   fns.forEach(function (fn) {
-    if (!isFunction(fns[0])) throw new TypeError(fnOnlyErrorMsg);
+    if (!isFunction(fn)) throw new TypeError('Decorators must be a function, but not "' + fn + '" in ' + (typeof fn === 'undefined' ? 'undefined' : _typeof$1(fn)));
   });
   if (fns.length === 1) return fns[0];
   return function (obj, prop, descirptor) {
@@ -1523,10 +1639,6 @@ function accessor() {
         configurable = _ref3$configurable === undefined ? true : _ref3$configurable,
         _ref3$enumerable = _ref3.enumerable,
         enumerable = _ref3$enumerable === undefined ? true : _ref3$enumerable;
-    // const configurable = descriptor ? descriptor.configurable : true;
-    // const enumerable = descriptor ? descriptor.enumerable : true;
-    // const writable = descriptor ? descriptor.w : true;
-
 
     var hasGet = isFunction(get);
     var hasSet = isFunction(set);
@@ -1544,10 +1656,10 @@ function accessor() {
 
       var hasOriginGet = isFunction(originGet);
       var hasOriginSet = isFunction(originSet);
-      if (!hasOriginGet && hasGet) {
+      if (process.env.NODE_ENV !== 'production' && !hasOriginGet && hasGet) {
         warn('You are trying to set getter via @accessor on ' + prop + ' without getter. That\'s not a good idea.');
       }
-      if (!hasOriginSet && hasSet) {
+      if (process.env.NODE_ENV !== 'production' && !hasOriginSet && hasSet) {
         warn('You are trying to set setter via @accessor on  ' + prop + ' without setter. That\'s not a good idea.');
       }
       var getter = hasOriginGet || hasGet ? function () {
@@ -1637,101 +1749,6 @@ function accessor() {
   };
 }
 
-var defineProperty$1 = function (obj, key, value) {
-  if (key in obj) {
-    Object.defineProperty(obj, key, {
-      value: value,
-      enumerable: true,
-      configurable: true,
-      writable: true
-    });
-  } else {
-    obj[key] = value;
-  }
-
-  return obj;
-};
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-var slicedToArray = function () {
-  function sliceIterator(arr, i) {
-    var _arr = [];
-    var _n = true;
-    var _d = false;
-    var _e = undefined;
-
-    try {
-      for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
-        _arr.push(_s.value);
-
-        if (i && _arr.length === i) break;
-      }
-    } catch (err) {
-      _d = true;
-      _e = err;
-    } finally {
-      try {
-        if (!_n && _i["return"]) _i["return"]();
-      } finally {
-        if (_d) throw _e;
-      }
-    }
-
-    return _arr;
-  }
-
-  return function (arr, i) {
-    if (Array.isArray(arr)) {
-      return arr;
-    } else if (Symbol.iterator in Object(arr)) {
-      return sliceIterator(arr, i);
-    } else {
-      throw new TypeError("Invalid attempt to destructure non-iterable instance");
-    }
-  };
-}();
-
-
-
-
-
-
-
-
-
-
-
-
-
-var toConsumableArray$1 = function (arr) {
-  if (Array.isArray(arr)) {
-    for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) arr2[i] = arr[i];
-
-    return arr2;
-  } else {
-    return Array.from(arr);
-  }
-};
-
 function before() {
   for (var _len = arguments.length, fns = Array(_len), _key = 0; _key < _len; _key++) {
     fns[_key] = arguments[_key];
@@ -1739,21 +1756,19 @@ function before() {
 
   if (fns.length === 0) throw new Error("@before accept at least one parameter. If you don't need to preprocess before your function, do not add @before decorators");
   if (fns.length > 2 && isDescriptor(fns[2])) {
-    throw new Error('You may use @before straightly, @before return decorators, you need to call it');
+    throw new Error('You may use @before straightly, @before return decorators, you should call it before you set it as decorator.');
   }
   for (var i = fns.length - 1; i > -1; i--) {
     if (!isFunction(fns[i])) throw new TypeError('@before only accept function parameter');
   }
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@before must used on descriptor, are you using it on undefined property?');
-    }
-    var fn = descriptor.value,
-        configurable = descriptor.configurable,
-        enumerable = descriptor.enumerable,
-        writable = descriptor.writable;
+    var _ref = descriptor || {},
+        fn = _ref.value,
+        configurable = _ref.configurable,
+        enumerable = _ref.enumerable,
+        writable = _ref.writable;
 
-    if (!isFunction(fn)) throw new TypeError('@before can only be used on function');
+    if (!isFunction(fn)) throw new TypeError('@before can only be used on function, please check the property "' + prop + '" is a method or not.');
     var handler = function handler() {
       var _this = this;
 
@@ -1785,19 +1800,17 @@ function after() {
 
   if (fns.length === 0) throw new Error("@after accept at least one parameter. If you don't need to preprocess after your function, do not add @after decorators");
   if (fns.length > 2 && isDescriptor(fns[2])) {
-    throw new Error('You may use @after straightly, @after return decorators, you need to call it');
+    throw new Error('You may have used @after straightly. @after return decorators. You should call it before you use it as decorators');
   }
   var fn = compressOneArgFnArray(fns, '@after only accept function parameter');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@after must used on descriptor, are you using it on undefined property?');
-    }
-    var value = descriptor.value,
-        configurable = descriptor.configurable,
-        enumerable = descriptor.enumerable,
-        writable = descriptor.writable;
+    var _ref = descriptor || {},
+        value = _ref.value,
+        configurable = _ref.configurable,
+        enumerable = _ref.enumerable,
+        writable = _ref.writable;
 
-    if (!isFunction(value)) throw new TypeError('@after can only be used on function');
+    if (!isFunction(value)) throw new TypeError('@after can only be used on function, please checkout your property "' + prop + '" is a method or not.');
     var handler = function handler() {
       var ret = bind(value, this).apply(undefined, arguments);
       return bind(fn, this)(ret);
@@ -1813,7 +1826,8 @@ function after() {
 
 function readonly(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @readonly on an undefined property. This property will become a readonly undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @readonly on an undefined property "' + prop + '". This property will become a readonly undefined forever, which is meaningless.');
     return {
       value: undefined,
       writable: false,
@@ -1910,9 +1924,10 @@ function setAlias(root, prop, _ref, obj, key, _ref2) {
   var originDesc = getOwnPropertyDescriptor$1(obj, key);
   if (originDesc !== undefined) {
     if (omit) return;
-    if (!force) throw new Error("@alias can't set alias on an existing attribute");
+    // TODO: we should add an github link here
+    if (!force) throw new Error('"' + prop + '" is an existing property, if you want to override it, please set "force" true in @alias option.');
     if (!originDesc.configurable) {
-      throw new Error("You are tring to set alias on an existing attribute which its configurable is false. That's impossible. Please check if you have set @frozen on it.");
+      throw new Error('property "' + prop + '" is unconfigurable.');
     }
   }
   defineProperty$2(obj, key, {
@@ -2090,14 +2105,13 @@ function getBoundSuper(obj, fn) {
  */
 function autobind(obj, prop, descriptor) {
   if (arguments.length === 1) return autobindClass()(obj);
-  if (!isDescriptor(descriptor)) {
-    throw new Error('@autobind must used on descriptor, are you using it on undefined property?');
-  }
-  var fn = descriptor.value,
-      configurable = descriptor.configurable;
+
+  var _ref = descriptor || {},
+      fn = _ref.value,
+      configurable = _ref.configurable;
 
   if (!isFunction(fn)) {
-    throw new TypeError('@autobind can only be used on functions, not: ' + fn + ')');
+    throw new TypeError('@autobind can only be used on functions, not "' + fn + '" in ' + (typeof fn === 'undefined' ? 'undefined' : _typeof$1(fn)) + ' on property "' + prop + '"');
   }
   var constructor = obj.constructor;
 
@@ -2156,7 +2170,8 @@ var defineProperty$4 = Object.defineProperty;
 
 function frozen(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @frozen on an undefined property. This property will become a frozen undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @frozen on an undefined property. This property will become a frozen undefined forever, which is meaningless');
     return {
       value: undefined,
       writable: false,
@@ -2171,7 +2186,8 @@ function frozen(obj, prop, descriptor) {
 
     descriptor.set = undefined;
     if (!isFunction(_get)) {
-      warn('You are using @frozen on one accessor descriptor without getter. This property will become a frozen undefined finally.Which maybe meaningless.');
+      /* istanbul ignore else  */
+      if (process.env.NODE_ENV !== 'production') warn('You are using @frozen on one accessor descriptor without getter. This property will become a frozen undefined finally.Which maybe meaningless.');
       return;
     }
     return {
@@ -2205,13 +2221,11 @@ function waituntil(key) {
 
   if (!isFunction(key) && !isPromise(key) && !isString(key)) throw new TypeError('@waitUntil only accept Function, Promise or String');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@waituntil must used on descriptor, are you using it on undefined property?');
-    }
-    var _value = descriptor.value,
-        configurable = descriptor.configurable;
+    var _ref2 = descriptor || {},
+        _value = _ref2.value,
+        configurable = _ref2.configurable;
 
-    if (!isFunction(_value)) throw new TypeError('@waituntil can only be used on function, but not ' + _value);
+    if (!isFunction(_value)) throw new TypeError('@waituntil can only be used on function, but not ' + _value + ' on property "' + prop + '"');
     var binded = false;
     var waitingQueue = [];
     var canIRun = isPromise(key) ? function () {
@@ -2291,7 +2305,8 @@ var defineProperty$6 = Object.defineProperty;
 function lazyInit(obj, prop, descriptor) {
   if (descriptor === undefined) throw new TypeError('@lazyInit cannot be apply on undefined property.');
   if (!isFunction(descriptor.initializer)) {
-    warn('@lazyInit can only be used on property, but not methods and getter/setter.');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('@lazyInit can only be used on property, but not propery "' + prop + '" which may be methods or getter/setter.');
     // $FlowFixMe: disjoint union ****
     return descriptor;
   }
@@ -2329,7 +2344,8 @@ var defineProperty$7 = Object.defineProperty;
 
 function lock(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @lock on an undefined property. This property will become a lock undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @lock on an undefined property "' + prop + '". This property will become a lock undefined forever, which is meaningless.');
     return {
       value: undefined,
       writable: false,
@@ -2420,7 +2436,8 @@ function applyDecorators(Class, props) {
     try {
       handler = compressMultipleDecorators.apply(undefined, toConsumableArray$1(decorators));
     } catch (err) {
-      warn(err && err.message);
+      /* istanbul ignore else  */
+      if (process.env.NODE_ENV !== 'production') warn(err && err.message);
       throw new Error('The decorators set on props must be Function or Array of Function');
     }
     var descriptor = getOwnPropertyDescriptor$3(prototype, key);
@@ -2578,10 +2595,6 @@ function deepObserve(value, hook, _ref2) {
     };
   }), nonenumerable]), defineProperty$1(_operateProps2, operationPrefix + 'del', [initialize(function (method) {
     return function (property) {
-      if (getOwnKeys(value).indexOf(property) === -1) {
-        var _props3 = getPropertyDecorators([property]);
-        applyDecorators(value, _props3, { self: true, omit: true });
-      }
       if (isFunction(method)) {
         bind(method, _this)(property);
       } else {
@@ -2612,9 +2625,10 @@ function watch() {
 
   var proxy = option.proxy;
 
-  if (!Proxy) {
+  if (typeof Proxy !== 'function') {
     proxy = false;
-    warn('You browser do not support Proxy, we will change back into observe mode.');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You browser do not support Proxy, we will fall back into observe mode.');
   }
   if (!args.length) throw new TypeError('You must pass a function or a string to find the hanlder function.');
   if (other !== undefined && isPrimitive(other)) throw new TypeError('If you want us to trigger function on the other instance, you must pass in a legal instance');
@@ -2696,7 +2710,7 @@ function watch() {
 var preventExtensions = Object.preventExtensions;
 
 function nonextendable(obj, prop, descriptor) {
-  if (descriptor === undefined) throw new Error('@nonextendable could not handle undefined');
+  if (descriptor === undefined) throw new Error('@nonextendable could not handle undefined property "' + prop + '".');
   return initialize(function (value) {
     preventExtensions(value);
     return value;
@@ -2710,13 +2724,11 @@ function runnable(key) {
 
   if (!isFunction(key) && !isString(key)) throw new TypeError('@runnable only accept Function or String');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@runnable must used on descriptor, are you using it on undefined property?');
-    }
-    var _value = descriptor.value,
-        configurable = descriptor.configurable;
+    var _ref2 = descriptor || {},
+        _value = _ref2.value,
+        configurable = _ref2.configurable;
 
-    if (!isFunction(_value)) throw new TypeError('@runnable can only be used on method, but not ' + _value + ' on ' + prop);
+    if (!isFunction(_value)) throw new TypeError('@runnable can only be used on method, but not ' + _value + ' on property "' + prop + '".');
     var canIRun = isFunction(key) ? key : function () {
       var keys = key.split('.');
       var originTarget = isPrimitive(other) ? this : other;
diff --git a/lib/toxic-decorators.js b/lib/toxic-decorators.js
index c815962..c0ce8a3 100644
--- a/lib/toxic-decorators.js
+++ b/lib/toxic-decorators.js
@@ -1,6 +1,6 @@
 
 /**
- * toxic-decorators v0.3.6
+ * toxic-decorators v0.3.7
  * (c) 2017 toxic-johann
  * Released under GPL-3.0
  */
@@ -11,6 +11,7 @@ Object.defineProperty(exports, '__esModule', { value: true });
 
 function _interopDefault (ex) { return (ex && (typeof ex === 'object') && 'default' in ex) ? ex['default'] : ex; }
 
+var _typeof = _interopDefault(require('babel-runtime/helpers/typeof'));
 var _Object$getOwnPropertyDescriptors = _interopDefault(require('babel-runtime/core-js/object/get-own-property-descriptors'));
 var _Array$from = _interopDefault(require('babel-runtime/core-js/array/from'));
 var _Object$getOwnPropertySymbols = _interopDefault(require('babel-runtime/core-js/object/get-own-property-symbols'));
@@ -124,13 +125,10 @@ function compressOneArgFnArray(fns) {
  * @param {anything} args
  */
 function warn() {
-  var _console2, _console3;
+  var _console, _console2;
 
-  var _console = console,
-      warn = _console.warn;
-
-  if (toxicPredicateFunctions.isFunction(warn)) return (_console2 = console).warn.apply(_console2, arguments);
-  (_console3 = console).log.apply(_console3, arguments);
+  if (toxicPredicateFunctions.isFunction(console.warn)) return (_console = console).warn.apply(_console, arguments);
+  (_console2 = console).log.apply(_console2, arguments);
 }
 
 function getOwnKeysFn() {
@@ -162,9 +160,9 @@ function compressMultipleDecorators() {
     fns[_key] = arguments[_key];
   }
 
-  var fnOnlyErrorMsg = 'compressMultipleDecorators only accept function';
+  if (!fns.length) throw new TypeError('You must pass in decorators in compressMultipleDecorators');
   fns.forEach(function (fn) {
-    if (!toxicPredicateFunctions.isFunction(fns[0])) throw new TypeError(fnOnlyErrorMsg);
+    if (!toxicPredicateFunctions.isFunction(fn)) throw new TypeError('Decorators must be a function, but not "' + fn + '" in ' + (typeof fn === 'undefined' ? 'undefined' : _typeof(fn)));
   });
   if (fns.length === 1) return fns[0];
   return function (obj, prop, descirptor) {
@@ -196,10 +194,6 @@ function accessor() {
         configurable = _ref3$configurable === undefined ? true : _ref3$configurable,
         _ref3$enumerable = _ref3.enumerable,
         enumerable = _ref3$enumerable === undefined ? true : _ref3$enumerable;
-    // const configurable = descriptor ? descriptor.configurable : true;
-    // const enumerable = descriptor ? descriptor.enumerable : true;
-    // const writable = descriptor ? descriptor.w : true;
-
 
     var hasGet = toxicPredicateFunctions.isFunction(get);
     var hasSet = toxicPredicateFunctions.isFunction(set);
@@ -217,10 +211,10 @@ function accessor() {
 
       var hasOriginGet = toxicPredicateFunctions.isFunction(originGet);
       var hasOriginSet = toxicPredicateFunctions.isFunction(originSet);
-      if (!hasOriginGet && hasGet) {
+      if (process.env.NODE_ENV !== 'production' && !hasOriginGet && hasGet) {
         warn('You are trying to set getter via @accessor on ' + prop + ' without getter. That\'s not a good idea.');
       }
-      if (!hasOriginSet && hasSet) {
+      if (process.env.NODE_ENV !== 'production' && !hasOriginSet && hasSet) {
         warn('You are trying to set setter via @accessor on  ' + prop + ' without setter. That\'s not a good idea.');
       }
       var getter = hasOriginGet || hasGet ? function () {
@@ -317,21 +311,19 @@ function before() {
 
   if (fns.length === 0) throw new Error("@before accept at least one parameter. If you don't need to preprocess before your function, do not add @before decorators");
   if (fns.length > 2 && isDescriptor(fns[2])) {
-    throw new Error('You may use @before straightly, @before return decorators, you need to call it');
+    throw new Error('You may use @before straightly, @before return decorators, you should call it before you set it as decorator.');
   }
   for (var i = fns.length - 1; i > -1; i--) {
     if (!toxicPredicateFunctions.isFunction(fns[i])) throw new TypeError('@before only accept function parameter');
   }
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@before must used on descriptor, are you using it on undefined property?');
-    }
-    var fn = descriptor.value,
-        configurable = descriptor.configurable,
-        enumerable = descriptor.enumerable,
-        writable = descriptor.writable;
+    var _ref = descriptor || {},
+        fn = _ref.value,
+        configurable = _ref.configurable,
+        enumerable = _ref.enumerable,
+        writable = _ref.writable;
 
-    if (!toxicPredicateFunctions.isFunction(fn)) throw new TypeError('@before can only be used on function');
+    if (!toxicPredicateFunctions.isFunction(fn)) throw new TypeError('@before can only be used on function, please check the property "' + prop + '" is a method or not.');
     var handler = function handler() {
       var _this = this;
 
@@ -363,19 +355,17 @@ function after() {
 
   if (fns.length === 0) throw new Error("@after accept at least one parameter. If you don't need to preprocess after your function, do not add @after decorators");
   if (fns.length > 2 && isDescriptor(fns[2])) {
-    throw new Error('You may use @after straightly, @after return decorators, you need to call it');
+    throw new Error('You may have used @after straightly. @after return decorators. You should call it before you use it as decorators');
   }
   var fn = compressOneArgFnArray(fns, '@after only accept function parameter');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@after must used on descriptor, are you using it on undefined property?');
-    }
-    var value = descriptor.value,
-        configurable = descriptor.configurable,
-        enumerable = descriptor.enumerable,
-        writable = descriptor.writable;
+    var _ref = descriptor || {},
+        value = _ref.value,
+        configurable = _ref.configurable,
+        enumerable = _ref.enumerable,
+        writable = _ref.writable;
 
-    if (!toxicPredicateFunctions.isFunction(value)) throw new TypeError('@after can only be used on function');
+    if (!toxicPredicateFunctions.isFunction(value)) throw new TypeError('@after can only be used on function, please checkout your property "' + prop + '" is a method or not.');
     var handler = function handler() {
       var ret = toxicUtils.bind(value, this).apply(undefined, arguments);
       return toxicUtils.bind(fn, this)(ret);
@@ -391,7 +381,8 @@ function after() {
 
 function readonly(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @readonly on an undefined property. This property will become a readonly undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @readonly on an undefined property "' + prop + '". This property will become a readonly undefined forever, which is meaningless.');
     return {
       value: undefined,
       writable: false,
@@ -488,9 +479,10 @@ function setAlias(root, prop, _ref, obj, key, _ref2) {
   var originDesc = getOwnPropertyDescriptor$1(obj, key);
   if (originDesc !== undefined) {
     if (omit) return;
-    if (!force) throw new Error("@alias can't set alias on an existing attribute");
+    // TODO: we should add an github link here
+    if (!force) throw new Error('"' + prop + '" is an existing property, if you want to override it, please set "force" true in @alias option.');
     if (!originDesc.configurable) {
-      throw new Error("You are tring to set alias on an existing attribute which its configurable is false. That's impossible. Please check if you have set @frozen on it.");
+      throw new Error('property "' + prop + '" is unconfigurable.');
     }
   }
   defineProperty(obj, key, {
@@ -668,14 +660,13 @@ function getBoundSuper(obj, fn) {
  */
 function autobind(obj, prop, descriptor) {
   if (arguments.length === 1) return autobindClass()(obj);
-  if (!isDescriptor(descriptor)) {
-    throw new Error('@autobind must used on descriptor, are you using it on undefined property?');
-  }
-  var fn = descriptor.value,
-      configurable = descriptor.configurable;
+
+  var _ref = descriptor || {},
+      fn = _ref.value,
+      configurable = _ref.configurable;
 
   if (!toxicPredicateFunctions.isFunction(fn)) {
-    throw new TypeError('@autobind can only be used on functions, not: ' + fn + ')');
+    throw new TypeError('@autobind can only be used on functions, not "' + fn + '" in ' + (typeof fn === 'undefined' ? 'undefined' : _typeof(fn)) + ' on property "' + prop + '"');
   }
   var constructor = obj.constructor;
 
@@ -734,7 +725,8 @@ var defineProperty$2 = _Object$defineProperty;
 
 function frozen(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @frozen on an undefined property. This property will become a frozen undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @frozen on an undefined property. This property will become a frozen undefined forever, which is meaningless');
     return {
       value: undefined,
       writable: false,
@@ -749,7 +741,8 @@ function frozen(obj, prop, descriptor) {
 
     descriptor.set = undefined;
     if (!toxicPredicateFunctions.isFunction(_get)) {
-      warn('You are using @frozen on one accessor descriptor without getter. This property will become a frozen undefined finally.Which maybe meaningless.');
+      /* istanbul ignore else  */
+      if (process.env.NODE_ENV !== 'production') warn('You are using @frozen on one accessor descriptor without getter. This property will become a frozen undefined finally.Which maybe meaningless.');
       return;
     }
     return {
@@ -783,13 +776,11 @@ function waituntil(key) {
 
   if (!toxicPredicateFunctions.isFunction(key) && !toxicPredicateFunctions.isPromise(key) && !toxicPredicateFunctions.isString(key)) throw new TypeError('@waitUntil only accept Function, Promise or String');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@waituntil must used on descriptor, are you using it on undefined property?');
-    }
-    var _value = descriptor.value,
-        configurable = descriptor.configurable;
+    var _ref2 = descriptor || {},
+        _value = _ref2.value,
+        configurable = _ref2.configurable;
 
-    if (!toxicPredicateFunctions.isFunction(_value)) throw new TypeError('@waituntil can only be used on function, but not ' + _value);
+    if (!toxicPredicateFunctions.isFunction(_value)) throw new TypeError('@waituntil can only be used on function, but not ' + _value + ' on property "' + prop + '"');
     var binded = false;
     var waitingQueue = [];
     var canIRun = toxicPredicateFunctions.isPromise(key) ? function () {
@@ -869,7 +860,8 @@ var defineProperty$4 = _Object$defineProperty;
 function lazyInit(obj, prop, descriptor) {
   if (descriptor === undefined) throw new TypeError('@lazyInit cannot be apply on undefined property.');
   if (!toxicPredicateFunctions.isFunction(descriptor.initializer)) {
-    warn('@lazyInit can only be used on property, but not methods and getter/setter.');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('@lazyInit can only be used on property, but not propery "' + prop + '" which may be methods or getter/setter.');
     // $FlowFixMe: disjoint union ****
     return descriptor;
   }
@@ -907,7 +899,8 @@ var defineProperty$5 = _Object$defineProperty;
 
 function lock(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @lock on an undefined property. This property will become a lock undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @lock on an undefined property "' + prop + '". This property will become a lock undefined forever, which is meaningless.');
     return {
       value: undefined,
       writable: false,
@@ -998,7 +991,8 @@ function applyDecorators(Class, props) {
     try {
       handler = compressMultipleDecorators.apply(undefined, _toConsumableArray(decorators));
     } catch (err) {
-      warn(err && err.message);
+      /* istanbul ignore else  */
+      if (process.env.NODE_ENV !== 'production') warn(err && err.message);
       throw new Error('The decorators set on props must be Function or Array of Function');
     }
     var descriptor = getOwnPropertyDescriptor$3(prototype, key);
@@ -1156,10 +1150,6 @@ function deepObserve(value, hook, _ref2) {
     };
   }), nonenumerable]), _defineProperty(_operateProps2, operationPrefix + 'del', [initialize(function (method) {
     return function (property) {
-      if (getOwnKeys(value).indexOf(property) === -1) {
-        var _props3 = getPropertyDecorators([property]);
-        applyDecorators(value, _props3, { self: true, omit: true });
-      }
       if (toxicPredicateFunctions.isFunction(method)) {
         toxicUtils.bind(method, _this)(property);
       } else {
@@ -1190,9 +1180,10 @@ function watch() {
 
   var proxy = option.proxy;
 
-  if (!Proxy) {
+  if (typeof Proxy !== 'function') {
     proxy = false;
-    warn('You browser do not support Proxy, we will change back into observe mode.');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You browser do not support Proxy, we will fall back into observe mode.');
   }
   if (!args.length) throw new TypeError('You must pass a function or a string to find the hanlder function.');
   if (other !== undefined && toxicPredicateFunctions.isPrimitive(other)) throw new TypeError('If you want us to trigger function on the other instance, you must pass in a legal instance');
@@ -1274,7 +1265,7 @@ function watch() {
 var preventExtensions = _Object$preventExtensions;
 
 function nonextendable(obj, prop, descriptor) {
-  if (descriptor === undefined) throw new Error('@nonextendable could not handle undefined');
+  if (descriptor === undefined) throw new Error('@nonextendable could not handle undefined property "' + prop + '".');
   return initialize(function (value) {
     preventExtensions(value);
     return value;
@@ -1288,13 +1279,11 @@ function runnable(key) {
 
   if (!toxicPredicateFunctions.isFunction(key) && !toxicPredicateFunctions.isString(key)) throw new TypeError('@runnable only accept Function or String');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@runnable must used on descriptor, are you using it on undefined property?');
-    }
-    var _value = descriptor.value,
-        configurable = descriptor.configurable;
+    var _ref2 = descriptor || {},
+        _value = _ref2.value,
+        configurable = _ref2.configurable;
 
-    if (!toxicPredicateFunctions.isFunction(_value)) throw new TypeError('@runnable can only be used on method, but not ' + _value + ' on ' + prop);
+    if (!toxicPredicateFunctions.isFunction(_value)) throw new TypeError('@runnable can only be used on method, but not ' + _value + ' on property "' + prop + '".');
     var canIRun = toxicPredicateFunctions.isFunction(key) ? key : function () {
       var keys = key.split('.');
       var originTarget = toxicPredicateFunctions.isPrimitive(other) ? this : other;
diff --git a/lib/toxic-decorators.min.js b/lib/toxic-decorators.min.js
index dca48c3..17c96be 100644
--- a/lib/toxic-decorators.min.js
+++ b/lib/toxic-decorators.min.js
@@ -1 +1 @@
-!function(r,e){"object"==typeof exports&&"undefined"!=typeof module?e(exports):"function"==typeof define&&define.amd?define(["exports"],e):e(r.toxicDecorators={})}(this,function(r){"use strict";function e(r){return r&&r.__esModule?r.default:r}function t(r,e){return e={exports:{}},r(e,e.exports),e.exports}function n(r){return void 0===r||null===r}function o(r){return Array.isArray(r)}function i(r){return"function"==typeof r}function u(r){return Object(r)===r&&"[object Object]"===String(r)&&!i(r)&&!o(r)}function a(r){return"number"==typeof r}function f(r){return"string"==typeof r||r instanceof String}function c(r){return"boolean"==typeof r}function l(r){return!!r&&("object"===(void 0===r?"undefined":et(r))||"function"==typeof r)&&"function"==typeof r.then}function s(r){return n(r)||c(r)||f(r)||a(r)}function p(r,e){return r.bind?r.bind(e):r.apply?function(){for(var t=arguments.length,n=Array(t),o=0;o<t;o++)n[o]=arguments[o];return r.apply(e,n)}:function(){for(var t=arguments.length,n=Array(t),o=0;o<t;o++)n[o]=arguments[o];return r.call.apply(r,[e].concat(It(n)))}}function y(r,e){var t=arguments.length>2&&void 0!==arguments[2]?arguments[2]:{},i=t.throwError,u=void 0!==i&&i,a=t.backup;if(f(e)&&(e=e.split(".")),!o(e))throw new TypeError("keys of getDeepProperty must be string or Array<string>");for(var c=[],l=r,s=0,p=e.length;s<p;s++){var y=e[s];if(n(l)){if(u)throw new Error("obj"+(c.length>0?"."+c.join("."):" itself")+" is "+l);return a}l=l[y],c.push(y)}return l}function d(r){if(!r||!r.hasOwnProperty)return!1;for(var e=["value","initializer","get","set"],t=0,n=e.length;t<n;t++)if(r.hasOwnProperty(e[t]))return!0;return!1}function v(r){return!!r&&(i(r.get)||i(r.set))&&c(r.configurable)&&c(r.enumerable)&&void 0===r.writable}function h(r){return!!r&&r.hasOwnProperty("value")&&c(r.configurable)&&c(r.enumerable)&&c(r.writable)}function b(r){return!!r&&i(r.initializer)&&c(r.configurable)&&c(r.enumerable)&&c(r.writable)}function g(r){return function(e){return Object.defineProperty(this,r,{configurable:!0,writable:!0,enumerable:!0,value:e}),e}}function w(r){var e=arguments.length>1&&void 0!==arguments[1]?arguments[1]:"You must pass me an array of function";if(!o(r)||r.length<1)throw new TypeError(e);if(1===r.length){if(!i(r[0]))throw new TypeError(e);return r[0]}return r.reduce(function(r,t){if(!i(t)||!i(r))throw new TypeError(e);return function(e){return p(t,this)(p(r,this)(e))}})}function m(){var r,e;if(i(console.warn))return(r=console).warn.apply(r,arguments);(e=console).log.apply(e,arguments)}function O(){for(var r=arguments.length,e=Array(r),t=0;t<r;t++)e[t]=arguments[t];return e.forEach(function(r){if(!i(e[0]))throw new TypeError("compressMultipleDecorators only accept function")}),1===e.length?e[0]:function(r,t,n){return e.reduce(function(e,n){return n(r,t,e)},n)}}function E(){var r=arguments.length>0&&void 0!==arguments[0]?arguments[0]:{},e=r.get,t=r.set,n=arguments.length>1&&void 0!==arguments[1]?arguments[1]:{},u=n.preGet,a=void 0!==u&&u,f=n.preSet,c=void 0===f||f;if(!(i(e)||i(t)||o(e)&&e.length>0||o(t)&&t.length>0))throw new TypeError("@accessor need a getter or setter. If you don't need to add setter/getter. You should remove @accessor");var l="@accessor only accept function or array of function as getter/setter";return e=o(e)?w(e,l):e,t=o(t)?w(t,l):t,function(r,n,o){var u=o||{},f=u.configurable,l=void 0===f||f,s=u.enumerable,y=void 0===s||s,d=i(e),h=i(t),g=function(r){return d?p(e,this)(r):r},w=function(r){return h?p(t,this)(r):r};if(v(o)){var O=o.get,E=o.set,P=i(O),j=i(E);return!P&&d&&m("You are trying to set getter via @accessor on "+n+" without getter. That's not a good idea."),!j&&h&&m("You are trying to set setter via @accessor on  "+n+" without setter. That's not a good idea."),{get:P||d?function(){var r=this,e=p(g,this),t=function(){return P?p(O,r)():void 0};return(a?[e,t]:[t,e]).reduce(function(r,e){return e(r)},void 0)}:void 0,set:j||h?function(r){var e=this,t=p(w,this),n=function(r){return j?p(E,e)(r):r};return(c?[t,n]:[n,t]).reduce(function(r,e){return e(r)},r)}:void 0,configurable:l,enumerable:y}}if(b(o)){var A=o.initializer,S=void 0,_=!1;return{get:function(){var r=p(g,this);return _?r(S):(S=p(A,this)(),_=!0,r(S))},set:function(r){var e=p(w,this);return S=c?e(r):r,_=!0,c||e(S),S},configurable:l,enumerable:y}}var T=(o||{}).value;return{get:function(){return p(g,this)(T)},set:function(r){var e=p(w,this);return T=c?e(r):r,c||e(T),T},configurable:l,enumerable:y}}}function P(){for(var r=arguments.length,e=Array(r),t=0;t<r;t++)e[t]=arguments[t];if(0===e.length)throw new Error("@before accept at least one parameter. If you don't need to preprocess before your function, do not add @before decorators");if(e.length>2&&d(e[2]))throw new Error("You may use @before straightly, @before return decorators, you need to call it");for(var n=e.length-1;n>-1;n--)if(!i(e[n]))throw new TypeError("@before only accept function parameter");return function(r,t,n){if(void 0===n)throw new Error("@before must used on descriptor, are you using it on undefined property?");var u=n.value,a=n.configurable,f=n.enumerable,c=n.writable;if(!i(u))throw new TypeError("@before can only be used on function");return{value:function(){for(var r=this,t=arguments.length,n=Array(t),i=0;i<t;i++)n[i]=arguments[i];var a=e.reduce(function(e,t){var n=p(t,r).apply(void 0,Ct(e));return void 0===n?e:o(n)?n:[n]},n);return p(u,this).apply(void 0,Ct(a))},configurable:a,enumerable:f,writable:c}}}function j(){for(var r=arguments.length,e=Array(r),t=0;t<r;t++)e[t]=arguments[t];if(0===e.length)throw new Error("@after accept at least one parameter. 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d(e)&&i(e.value)},customArgs:!0});r.accessor=E,r.before=S,r.after=P,r.readonly=function(r,t,e){return void 0===e?{value:void 0,writable:!1,enumerable:!0,configurable:!0}:h(e)?(e.set=void 0,e):(e.writable=!1,e)},r.alias=function(r,t,e){if(2===arguments.length?f(r)&&(e=t,t=r,r=void 0):1===arguments.length&&(t=r,r=void 0),!f(t))throw new TypeError("@alias need a string as a key to find the porperty to set alias on");var n="If you want to use @alias to set alias on other instance, you must pass in a legal instance";if(void 0!==r&&s(r))throw new TypeError(n);var o=u(e)?e:{force:!1,omit:!1},i=o.force,a=o.omit;return function(e,o,u){function f(r,t,e){var o=s(r)?t:r,i=e.split("."),u=i.slice(-1),a=Ne(u,1)[0];if(o=y(o,i.slice(0,-1),{throwError:!0}),s(o))throw new TypeError(n);return{target:o,name:a}}if(u=u||{value:void 0,configurable:!0,writable:!0,enumerable:!0},b(u))return j(function(e){var n=f(r,this,t),c=n.target,l=n.name;return A(this,o,u,c,l,{force:i,omit:a}),e})(e,o,u);if(h(u)){var c=void 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diff --git a/lib/toxic-decorators.mjs b/lib/toxic-decorators.mjs
index b2ce82a..dc49eba 100644
--- a/lib/toxic-decorators.mjs
+++ b/lib/toxic-decorators.mjs
@@ -1,10 +1,11 @@
 
 /**
- * toxic-decorators v0.3.6
+ * toxic-decorators v0.3.7
  * (c) 2017 toxic-johann
  * Released under GPL-3.0
  */
 
+import _typeof from 'babel-runtime/helpers/typeof';
 import _Object$getOwnPropertyDescriptors from 'babel-runtime/core-js/object/get-own-property-descriptors';
 import _Array$from from 'babel-runtime/core-js/array/from';
 import _Object$getOwnPropertySymbols from 'babel-runtime/core-js/object/get-own-property-symbols';
@@ -119,13 +120,10 @@ function compressOneArgFnArray(fns) {
  * @param {anything} args
  */
 function warn() {
-  var _console2, _console3;
+  var _console, _console2;
 
-  var _console = console,
-      warn = _console.warn;
-
-  if (isFunction(warn)) return (_console2 = console).warn.apply(_console2, arguments);
-  (_console3 = console).log.apply(_console3, arguments);
+  if (isFunction(console.warn)) return (_console = console).warn.apply(_console, arguments);
+  (_console2 = console).log.apply(_console2, arguments);
 }
 
 function getOwnKeysFn() {
@@ -157,9 +155,9 @@ function compressMultipleDecorators() {
     fns[_key] = arguments[_key];
   }
 
-  var fnOnlyErrorMsg = 'compressMultipleDecorators only accept function';
+  if (!fns.length) throw new TypeError('You must pass in decorators in compressMultipleDecorators');
   fns.forEach(function (fn) {
-    if (!isFunction(fns[0])) throw new TypeError(fnOnlyErrorMsg);
+    if (!isFunction(fn)) throw new TypeError('Decorators must be a function, but not "' + fn + '" in ' + (typeof fn === 'undefined' ? 'undefined' : _typeof(fn)));
   });
   if (fns.length === 1) return fns[0];
   return function (obj, prop, descirptor) {
@@ -191,10 +189,6 @@ function accessor() {
         configurable = _ref3$configurable === undefined ? true : _ref3$configurable,
         _ref3$enumerable = _ref3.enumerable,
         enumerable = _ref3$enumerable === undefined ? true : _ref3$enumerable;
-    // const configurable = descriptor ? descriptor.configurable : true;
-    // const enumerable = descriptor ? descriptor.enumerable : true;
-    // const writable = descriptor ? descriptor.w : true;
-
 
     var hasGet = isFunction(get);
     var hasSet = isFunction(set);
@@ -212,10 +206,10 @@ function accessor() {
 
       var hasOriginGet = isFunction(originGet);
       var hasOriginSet = isFunction(originSet);
-      if (!hasOriginGet && hasGet) {
+      if (process.env.NODE_ENV !== 'production' && !hasOriginGet && hasGet) {
         warn('You are trying to set getter via @accessor on ' + prop + ' without getter. That\'s not a good idea.');
       }
-      if (!hasOriginSet && hasSet) {
+      if (process.env.NODE_ENV !== 'production' && !hasOriginSet && hasSet) {
         warn('You are trying to set setter via @accessor on  ' + prop + ' without setter. That\'s not a good idea.');
       }
       var getter = hasOriginGet || hasGet ? function () {
@@ -312,21 +306,19 @@ function before() {
 
   if (fns.length === 0) throw new Error("@before accept at least one parameter. If you don't need to preprocess before your function, do not add @before decorators");
   if (fns.length > 2 && isDescriptor(fns[2])) {
-    throw new Error('You may use @before straightly, @before return decorators, you need to call it');
+    throw new Error('You may use @before straightly, @before return decorators, you should call it before you set it as decorator.');
   }
   for (var i = fns.length - 1; i > -1; i--) {
     if (!isFunction(fns[i])) throw new TypeError('@before only accept function parameter');
   }
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@before must used on descriptor, are you using it on undefined property?');
-    }
-    var fn = descriptor.value,
-        configurable = descriptor.configurable,
-        enumerable = descriptor.enumerable,
-        writable = descriptor.writable;
+    var _ref = descriptor || {},
+        fn = _ref.value,
+        configurable = _ref.configurable,
+        enumerable = _ref.enumerable,
+        writable = _ref.writable;
 
-    if (!isFunction(fn)) throw new TypeError('@before can only be used on function');
+    if (!isFunction(fn)) throw new TypeError('@before can only be used on function, please check the property "' + prop + '" is a method or not.');
     var handler = function handler() {
       var _this = this;
 
@@ -358,19 +350,17 @@ function after() {
 
   if (fns.length === 0) throw new Error("@after accept at least one parameter. If you don't need to preprocess after your function, do not add @after decorators");
   if (fns.length > 2 && isDescriptor(fns[2])) {
-    throw new Error('You may use @after straightly, @after return decorators, you need to call it');
+    throw new Error('You may have used @after straightly. @after return decorators. You should call it before you use it as decorators');
   }
   var fn = compressOneArgFnArray(fns, '@after only accept function parameter');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@after must used on descriptor, are you using it on undefined property?');
-    }
-    var value = descriptor.value,
-        configurable = descriptor.configurable,
-        enumerable = descriptor.enumerable,
-        writable = descriptor.writable;
+    var _ref = descriptor || {},
+        value = _ref.value,
+        configurable = _ref.configurable,
+        enumerable = _ref.enumerable,
+        writable = _ref.writable;
 
-    if (!isFunction(value)) throw new TypeError('@after can only be used on function');
+    if (!isFunction(value)) throw new TypeError('@after can only be used on function, please checkout your property "' + prop + '" is a method or not.');
     var handler = function handler() {
       var ret = bind(value, this).apply(undefined, arguments);
       return bind(fn, this)(ret);
@@ -386,7 +376,8 @@ function after() {
 
 function readonly(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @readonly on an undefined property. This property will become a readonly undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @readonly on an undefined property "' + prop + '". This property will become a readonly undefined forever, which is meaningless.');
     return {
       value: undefined,
       writable: false,
@@ -483,9 +474,10 @@ function setAlias(root, prop, _ref, obj, key, _ref2) {
   var originDesc = getOwnPropertyDescriptor$1(obj, key);
   if (originDesc !== undefined) {
     if (omit) return;
-    if (!force) throw new Error("@alias can't set alias on an existing attribute");
+    // TODO: we should add an github link here
+    if (!force) throw new Error('"' + prop + '" is an existing property, if you want to override it, please set "force" true in @alias option.');
     if (!originDesc.configurable) {
-      throw new Error("You are tring to set alias on an existing attribute which its configurable is false. That's impossible. Please check if you have set @frozen on it.");
+      throw new Error('property "' + prop + '" is unconfigurable.');
     }
   }
   defineProperty(obj, key, {
@@ -663,14 +655,13 @@ function getBoundSuper(obj, fn) {
  */
 function autobind(obj, prop, descriptor) {
   if (arguments.length === 1) return autobindClass()(obj);
-  if (!isDescriptor(descriptor)) {
-    throw new Error('@autobind must used on descriptor, are you using it on undefined property?');
-  }
-  var fn = descriptor.value,
-      configurable = descriptor.configurable;
+
+  var _ref = descriptor || {},
+      fn = _ref.value,
+      configurable = _ref.configurable;
 
   if (!isFunction(fn)) {
-    throw new TypeError('@autobind can only be used on functions, not: ' + fn + ')');
+    throw new TypeError('@autobind can only be used on functions, not "' + fn + '" in ' + (typeof fn === 'undefined' ? 'undefined' : _typeof(fn)) + ' on property "' + prop + '"');
   }
   var constructor = obj.constructor;
 
@@ -729,7 +720,8 @@ var defineProperty$2 = _Object$defineProperty;
 
 function frozen(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @frozen on an undefined property. This property will become a frozen undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @frozen on an undefined property. This property will become a frozen undefined forever, which is meaningless');
     return {
       value: undefined,
       writable: false,
@@ -744,7 +736,8 @@ function frozen(obj, prop, descriptor) {
 
     descriptor.set = undefined;
     if (!isFunction(_get)) {
-      warn('You are using @frozen on one accessor descriptor without getter. This property will become a frozen undefined finally.Which maybe meaningless.');
+      /* istanbul ignore else  */
+      if (process.env.NODE_ENV !== 'production') warn('You are using @frozen on one accessor descriptor without getter. This property will become a frozen undefined finally.Which maybe meaningless.');
       return;
     }
     return {
@@ -778,13 +771,11 @@ function waituntil(key) {
 
   if (!isFunction(key) && !isPromise(key) && !isString(key)) throw new TypeError('@waitUntil only accept Function, Promise or String');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@waituntil must used on descriptor, are you using it on undefined property?');
-    }
-    var _value = descriptor.value,
-        configurable = descriptor.configurable;
+    var _ref2 = descriptor || {},
+        _value = _ref2.value,
+        configurable = _ref2.configurable;
 
-    if (!isFunction(_value)) throw new TypeError('@waituntil can only be used on function, but not ' + _value);
+    if (!isFunction(_value)) throw new TypeError('@waituntil can only be used on function, but not ' + _value + ' on property "' + prop + '"');
     var binded = false;
     var waitingQueue = [];
     var canIRun = isPromise(key) ? function () {
@@ -864,7 +855,8 @@ var defineProperty$4 = _Object$defineProperty;
 function lazyInit(obj, prop, descriptor) {
   if (descriptor === undefined) throw new TypeError('@lazyInit cannot be apply on undefined property.');
   if (!isFunction(descriptor.initializer)) {
-    warn('@lazyInit can only be used on property, but not methods and getter/setter.');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('@lazyInit can only be used on property, but not propery "' + prop + '" which may be methods or getter/setter.');
     // $FlowFixMe: disjoint union ****
     return descriptor;
   }
@@ -902,7 +894,8 @@ var defineProperty$5 = _Object$defineProperty;
 
 function lock(obj, prop, descriptor) {
   if (descriptor === undefined) {
-    warn('You are using @lock on an undefined property. This property will become a lock undefined forever, which is meaningless');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You are using @lock on an undefined property "' + prop + '". This property will become a lock undefined forever, which is meaningless.');
     return {
       value: undefined,
       writable: false,
@@ -993,7 +986,8 @@ function applyDecorators(Class, props) {
     try {
       handler = compressMultipleDecorators.apply(undefined, _toConsumableArray(decorators));
     } catch (err) {
-      warn(err && err.message);
+      /* istanbul ignore else  */
+      if (process.env.NODE_ENV !== 'production') warn(err && err.message);
       throw new Error('The decorators set on props must be Function or Array of Function');
     }
     var descriptor = getOwnPropertyDescriptor$3(prototype, key);
@@ -1151,10 +1145,6 @@ function deepObserve(value, hook, _ref2) {
     };
   }), nonenumerable]), _defineProperty(_operateProps2, operationPrefix + 'del', [initialize(function (method) {
     return function (property) {
-      if (getOwnKeys(value).indexOf(property) === -1) {
-        var _props3 = getPropertyDecorators([property]);
-        applyDecorators(value, _props3, { self: true, omit: true });
-      }
       if (isFunction(method)) {
         bind(method, _this)(property);
       } else {
@@ -1185,9 +1175,10 @@ function watch() {
 
   var proxy = option.proxy;
 
-  if (!Proxy) {
+  if (typeof Proxy !== 'function') {
     proxy = false;
-    warn('You browser do not support Proxy, we will change back into observe mode.');
+    /* istanbul ignore else  */
+    if (process.env.NODE_ENV !== 'production') warn('You browser do not support Proxy, we will fall back into observe mode.');
   }
   if (!args.length) throw new TypeError('You must pass a function or a string to find the hanlder function.');
   if (other !== undefined && isPrimitive(other)) throw new TypeError('If you want us to trigger function on the other instance, you must pass in a legal instance');
@@ -1269,7 +1260,7 @@ function watch() {
 var preventExtensions = _Object$preventExtensions;
 
 function nonextendable(obj, prop, descriptor) {
-  if (descriptor === undefined) throw new Error('@nonextendable could not handle undefined');
+  if (descriptor === undefined) throw new Error('@nonextendable could not handle undefined property "' + prop + '".');
   return initialize(function (value) {
     preventExtensions(value);
     return value;
@@ -1283,13 +1274,11 @@ function runnable(key) {
 
   if (!isFunction(key) && !isString(key)) throw new TypeError('@runnable only accept Function or String');
   return function (obj, prop, descriptor) {
-    if (descriptor === undefined) {
-      throw new Error('@runnable must used on descriptor, are you using it on undefined property?');
-    }
-    var _value = descriptor.value,
-        configurable = descriptor.configurable;
+    var _ref2 = descriptor || {},
+        _value = _ref2.value,
+        configurable = _ref2.configurable;
 
-    if (!isFunction(_value)) throw new TypeError('@runnable can only be used on method, but not ' + _value + ' on ' + prop);
+    if (!isFunction(_value)) throw new TypeError('@runnable can only be used on method, but not ' + _value + ' on property "' + prop + '".');
     var canIRun = isFunction(key) ? key : function () {
       var keys = key.split('.');
       var originTarget = isPrimitive(other) ? this : other;
diff --git a/package.json b/package.json
index 2be7ee7..b15ba70 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "toxic-decorators",
-  "version": "0.3.6",
+  "version": "0.3.7",
   "description": "decorators",
   "main": "lib/toxic-decorators.js",
   "module": "lib/toxic-decorators.mjs",