diff --git a/DrissionPage/chromium_base.py b/DrissionPage/chromium_base.py
index cae0381..d210210 100644
--- a/DrissionPage/chromium_base.py
+++ b/DrissionPage/chromium_base.py
@@ -10,6 +10,7 @@ from warnings import warn
 
 from requests import Session
 
+from .functions.tools import AlertExistsError
 from .functions.tools import get_usable_path
 from .base import BasePage
 from .chromium_driver import ChromiumDriver
@@ -73,6 +74,7 @@ class ChromiumBase(BasePage):
         self._first_run = True
         self._is_reading = False
         self._upload_list = None
+        self._wait = None
 
     def _driver_init(self, tab_id):
         """新建页面、页面刷新、切换标签页后要进行的cdp参数初始化
@@ -278,24 +280,18 @@ class ChromiumBase(BasePage):
     @property
     def ready_state(self):
         """返回当前页面加载状态，'loading' 'interactive' 'complete'"""
-        try:
-            return self.run_cdp('Runtime.evaluate', expression='document.readyState;')['result']['value']
-        except KeyError:
-            raise ConnectionError('标签页或连接已关闭。')
+        return self.run_cdp('Runtime.evaluate', expression='document.readyState;')['result']['value']
 
     @property
     def size(self):
         """返回页面总宽高，格式：(宽, 高)"""
-        # w = self.run_js('document.body.scrollWidth;', as_expr=True)
-        # h = self.run_js('document.body.scrollHeight;', as_expr=True)
-        # return w, h
         r = self.run_cdp_loaded('Page.getLayoutMetrics')['contentSize']
         return r['width'], r['height']
 
     @property
     def active_ele(self):
         """返回当前焦点所在元素"""
-        return self.run_js('return document.activeElement;')
+        return self.run_js_loaded('return document.activeElement;')
 
     @property
     def page_load_strategy(self):
@@ -328,7 +324,9 @@ class ChromiumBase(BasePage):
     @property
     def wait(self):
         """返回用于等待的对象"""
-        return ChromiumPageWaiter(self)
+        if self._wait is None:
+            self._wait = ChromiumPageWaiter(self)
+        return self._wait
 
     def set_timeouts(self, implicit=None, page_load=None, script=None):
         """设置超时时间，单位为秒
@@ -346,6 +344,36 @@ class ChromiumBase(BasePage):
         if script is not None:
             self._timeouts.script = script
 
+    def run_cdp(self, cmd, **cmd_args):
+        """执行Chrome DevTools Protocol语句
+        :param cmd: 协议项目
+        :param cmd_args: 参数
+        :return: 执行的结果
+        """
+        r = self.driver.call_method(cmd, **cmd_args)
+        if 'error' not in r:
+            return r
+
+        if 'Cannot find context with specified id' in r['error']:
+            raise RuntimeError('页面被刷新，请操作前尝试等待页面刷新或加载完成。')
+        elif 'Could not find node with given id' in r['error']:
+            raise RuntimeError('该元素已不在当前页面中。')
+        elif 'tab closed' in r['error']:
+            raise RuntimeError('标签页已关闭。')
+        elif 'alert exists' in r['error']:
+            raise AlertExistsError('存在未处理的提示框。')
+        else:
+            raise RuntimeError(r)
+
+    def run_cdp_loaded(self, cmd, **cmd_args):
+        """执行Chrome DevTools Protocol语句，执行前等待页面加载完毕
+        :param cmd: 协议项目
+        :param cmd_args: 参数
+        :return: 执行的结果
+        """
+        self.wait.load_complete()
+        return self.run_cdp(cmd, **cmd_args)
+
     def run_js(self, script, as_expr=False, *args):
         """运行javascript代码
         :param script: js文本
@@ -355,6 +383,16 @@ class ChromiumBase(BasePage):
         """
         return run_js(self, script, as_expr, self.timeouts.script, args)
 
+    def run_js_loaded(self, script, as_expr=False, *args):
+        """运行javascript代码，执行前等待页面加载完毕
+        :param script: js文本
+        :param as_expr: 是否作为表达式运行，为True时args无效
+        :param args: 参数，按顺序在js文本中对应argument[0]、argument[1]...
+        :return: 运行的结果
+        """
+        self.wait.load_complete()
+        return run_js(self, script, as_expr, self.timeouts.script, args)
+
     def run_async_js(self, script, as_expr=False, *args):
         """以异步方式执行js代码
         :param script: js文本
@@ -553,35 +591,6 @@ class ChromiumBase(BasePage):
         while self.ready_state != 'complete':
             sleep(.1)
 
-    def run_cdp(self, cmd, **cmd_args):
-        """执行Chrome DevTools Protocol语句
-        :param cmd: 协议项目
-        :param cmd_args: 参数
-        :return: 执行的结果
-        """
-        r = self.driver.call_method(cmd, **cmd_args)
-        if 'error' not in r:
-            return r
-
-        if 'Cannot find context with specified id' in r['error']:
-            raise RuntimeError('页面被刷新，请操作前尝试等待页面刷新或加载完成。')
-        elif 'Could not find node with given id' in r['error']:
-            raise RuntimeError('该元素已不在当前页面中。')
-        elif 'tab closed' in r['error']:
-            raise RuntimeError('标签页已关闭。')
-        else:
-            raise RuntimeError(r)
-
-    def run_cdp_loaded(self, cmd, **cmd_args):
-        """执行Chrome DevTools Protocol语句，执行前等待页面加载完毕
-        :param cmd: 协议项目
-        :param cmd_args: 参数
-        :return: 执行的结果
-        """
-        while self.is_loading:
-            sleep(.1)
-        return self.run_cdp(cmd, **cmd_args)
-
     def set_user_agent(self, ua, platform=None):
         """为当前tab设置user agent，只在当前tab有效
         :param ua: user agent字符串
@@ -599,7 +608,7 @@ class ChromiumBase(BasePage):
         :return: sessionStorage一个或所有项内容
         """
         js = f'sessionStorage.getItem("{item}");' if item else 'sessionStorage;'
-        return self.run_js(js, as_expr=True)
+        return self.run_js_loaded(js, as_expr=True)
 
     def get_local_storage(self, item=None):
         """获取localStorage信息，不设置item则获取全部
@@ -607,7 +616,7 @@ class ChromiumBase(BasePage):
         :return: localStorage一个或所有项内容
         """
         js = f'localStorage.getItem("{item}");' if item else 'localStorage;'
-        return self.run_js(js, as_expr=True)
+        return self.run_js_loaded(js, as_expr=True)
 
     def set_session_storage(self, item, value):
         """设置或删除某项sessionStorage信息
@@ -617,7 +626,7 @@ class ChromiumBase(BasePage):
         """
         js = f'sessionStorage.removeItem("{item}");' if item is False \
             else f'sessionStorage.setItem("{item}","{value}");'
-        return self.run_js(js, as_expr=True)
+        return self.run_js_loaded(js, as_expr=True)
 
     def set_local_storage(self, item, value):
         """设置或删除某项localStorage信息
@@ -626,7 +635,7 @@ class ChromiumBase(BasePage):
         :return: None
         """
         js = f'localStorage.removeItem("{item}");' if item is False else f'localStorage.setItem("{item}","{value}");'
-        return self.run_js(js, as_expr=True)
+        return self.run_js_loaded(js, as_expr=True)
 
     def get_screenshot(self, path=None, as_bytes=None, full_page=False, left_top=None, right_bottom=None):
         """对页面进行截图，可对整个网页、可见网页、指定范围截图。对可视范围外截图需要90以上版本浏览器支持
@@ -715,8 +724,7 @@ class ChromiumBase(BasePage):
             result = self.run_cdp('Page.navigate', url=to_url)
 
             is_timeout = not self._wait_loaded(timeout)
-            while self.is_loading:
-                sleep(.1)
+            self.wait.load_complete()
 
             if is_timeout:
                 err = TimeoutError('页面连接超时。')
@@ -824,7 +832,7 @@ class ChromiumPageScroll(ChromiumScroll):
         try:
             self._driver.run_cdp_loaded('DOM.scrollIntoViewIfNeeded', nodeId=node_id)
         except Exception:
-            ele.run_js("this.scrollIntoView();")
+            ele.run_js_loaded("this.scrollIntoView();")
 
         if not ele.is_in_viewport:
             offset_scroll(ele, 0, 0)
diff --git a/DrissionPage/chromium_base.pyi b/DrissionPage/chromium_base.pyi
index ecb28f3..e4e26b1 100644
--- a/DrissionPage/chromium_base.pyi
+++ b/DrissionPage/chromium_base.pyi
@@ -37,6 +37,7 @@ class ChromiumBase(BasePage):
         self._debug: bool = ...
         self._debug_recorder: Recorder = ...
         self._upload_list: list = ...
+        self._wait: ChromiumPageWaiter = ...
 
     def _connect_browser(self, tab_id: str = None) -> None: ...
 
@@ -127,6 +128,8 @@ class ChromiumBase(BasePage):
 
     def run_js(self, script: str, as_expr: bool = False, *args: Any) -> Any: ...
 
+    def run_js_loaded(self, script: str, as_expr: bool = False, *args: Any) -> Any: ...
+
     def run_async_js(self, script: str, as_expr: bool = False, *args: Any) -> None: ...
 
     def get(self,
diff --git a/DrissionPage/chromium_driver.py b/DrissionPage/chromium_driver.py
index eaffdbc..677b1c6 100644
--- a/DrissionPage/chromium_driver.py
+++ b/DrissionPage/chromium_driver.py
@@ -99,7 +99,8 @@ class ChromiumDriver(object):
 
                 except Empty:
                     if self.has_alert:
-                        return {'result': {'alert': True}}
+                        return {'error': {'message': 'alert exists'},
+                                'type': 'alert_exists'}
                     if isinstance(timeout, (int, float)) and timeout <= 0:
                         raise TimeoutError(f"调用{message['method']}超时。")
 
@@ -179,7 +180,7 @@ class ChromiumDriver(object):
             return {'error': 'tab closed', 'type': 'tab_closed'}
         if 'result' not in result and 'error' in result:
             return {'error': result['error']['message'],
-                    'type': 'call_method_error',
+                    'type': result.get('type', 'call_method_error'),
                     'method': _method,
                     'args': kwargs}
 
diff --git a/DrissionPage/chromium_element.py b/DrissionPage/chromium_element.py
index a30b353..9e0ba68 100644
--- a/DrissionPage/chromium_element.py
+++ b/DrissionPage/chromium_element.py
@@ -32,6 +32,7 @@ class ChromiumElement(DrissionElement):
         self._select = None
         self._scroll = None
         self._tag = None
+        self._wait = None
 
         if node_id:
             self._node_id = node_id
@@ -274,7 +275,9 @@ class ChromiumElement(DrissionElement):
     @property
     def wait(self):
         """返回用于等待的对象"""
-        return ChromiumWaiter(self)
+        if self._wait is None:
+            self._wait = ChromiumWaiter(self)
+        return self._wait
 
     @property
     def select(self):
@@ -356,7 +359,7 @@ class ChromiumElement(DrissionElement):
         :param value: 属性值
         :return: None
         """
-        self.run_js(f'this.setAttribute(arguments[0], arguments[1]);', False, attr, str(value))
+        self.page.run_cdp('DOM.setAttributeValue', nodeId=self.node_id, name=attr, value=str(value))
 
     def remove_attr(self, attr):
         """删除元素attribute属性
@@ -1282,29 +1285,33 @@ def run_js(page_or_ele, script, as_expr=False, timeout=None, args=None):
     if isinstance(page_or_ele, (ChromiumElement, ChromiumShadowRootElement)):
         page = page_or_ele.page
         obj_id = page_or_ele.obj_id
+        is_page = False
     else:
         page = page_or_ele
         obj_id = page_or_ele._root_id
+        is_page = True
 
     if as_expr:
-        res = page.run_cdp('Runtime.evaluate',
-                           expression=script,
-                           returnByValue=False,
-                           awaitPromise=True,
-                           userGesture=True,
-                           timeout=timeout * 1000)
+        res = page.driver.Runtime.evaluate(expression=script,
+                                           returnByValue=False,
+                                           awaitPromise=True,
+                                           userGesture=True,
+                                           timeout=timeout * 1000)
 
     else:
         args = args or ()
         if not is_js_func(script):
             script = f'function(){{{script}}}'
-        res = page.run_cdp('Runtime.callFunctionOn',
-                           functionDeclaration=script,
-                           objectId=obj_id,
-                           arguments=[_convert_argument(arg) for arg in args],
-                           returnByValue=False,
-                           awaitPromise=True,
-                           userGesture=True)
+        res = page.driver.Runtime.callFunctionOn(functionDeclaration=script,
+                                                 objectId=obj_id,
+                                                 arguments=[_convert_argument(arg) for arg in args],
+                                                 returnByValue=False,
+                                                 awaitPromise=True,
+                                                 userGesture=True)
+
+    if 'Cannot find context with specified id' in res.get('error', ''):
+        txt = '页面已被刷新，请尝试等待页面加载完成再执行操作。' if is_page else '元素已不在页面内。'
+        raise RuntimeError(txt)
 
     exceptionDetails = res.get('exceptionDetails')
     if exceptionDetails:
@@ -1338,7 +1345,8 @@ def _parse_js_result(page, ele, result):
                 return make_chromium_ele(page, obj_id=result['objectId'])
 
         elif sub_type == 'array':
-            r = page.run_cdp('Runtime.getProperties', objectId=result['result']['objectId'], ownProperties=True)['result']
+            r = page.run_cdp('Runtime.getProperties', objectId=result['result']['objectId'],
+                             ownProperties=True)['result']
             return [_parse_js_result(page, ele, result=i['value']) for i in r]
 
         else:
diff --git a/DrissionPage/chromium_element.pyi b/DrissionPage/chromium_element.pyi
index 5d03be1..524fc08 100644
--- a/DrissionPage/chromium_element.pyi
+++ b/DrissionPage/chromium_element.pyi
@@ -27,6 +27,7 @@ class ChromiumElement(DrissionElement):
         self._doc_id: str = ...
         self._scroll: ChromiumScroll = ...
         self._select: ChromiumSelect = ...
+        self._wait: ChromiumWaiter = ...
 
     def __repr__(self) -> str: ...
 
diff --git a/DrissionPage/chromium_frame.py b/DrissionPage/chromium_frame.py
index 7b31d50..eaeeac9 100644
--- a/DrissionPage/chromium_frame.py
+++ b/DrissionPage/chromium_frame.py
@@ -53,8 +53,11 @@ class ChromiumFrame(ChromiumBase):
         :param tab_id: 要跳转到的标签页id
         :return: None
         """
-        self._control_session.get(f'http://{self.address}/json')
-        super()._driver_init(tab_id)
+        try:
+            super()._driver_init(tab_id)
+        except:
+            self._control_session.get(f'http://{self.address}/json')
+            super()._driver_init(tab_id)
 
     def _reload(self):
         """重新获取document"""
diff --git a/DrissionPage/chromium_page.py b/DrissionPage/chromium_page.py
index 9a700e7..0089a43 100644
--- a/DrissionPage/chromium_page.py
+++ b/DrissionPage/chromium_page.py
@@ -138,10 +138,14 @@ class ChromiumPage(ChromiumBase):
     @property
     def process_id(self):
         """返回浏览器进程id"""
-        try:
-            return self.driver.SystemInfo.getProcessInfo()['id']
-        except Exception:
-            return None
+        if self.process:
+            return self.process.pid
+
+        r = self.browser_driver.SystemInfo.getProcessInfo()['processInfo']
+        for i in r:
+            if i['type'] == 'browser':
+                return i['id']
+        return None
 
     @property
     def set_window(self):
@@ -483,8 +487,8 @@ class WindowSetter(object):
     """用于设置窗口大小的类"""
 
     def __init__(self, page):
-        self.driver = page.driver
-        self.window_id = self._get_info()['windowId']
+        self._page = page
+        self._window_id = self._get_info()['windowId']
 
     def maximized(self):
         """窗口最大化"""
@@ -544,14 +548,14 @@ class WindowSetter(object):
 
     def _get_info(self):
         """获取窗口位置及大小信息"""
-        return self.driver.Browser.getWindowForTarget()
+        return self._page.run_cdp('Browser.getWindowForTarget')
 
     def _perform(self, bounds):
         """执行改变窗口大小操作
         :param bounds: 控制数据
         :return: None
         """
-        self.driver.Browser.setWindowBounds(windowId=self.window_id, bounds=bounds)
+        self._page.run_cdp('Browser.setWindowBounds', windowId=self._window_id, bounds=bounds)
 
 
 def show_or_hide_browser(page, hide=True):
diff --git a/DrissionPage/chromium_page.pyi b/DrissionPage/chromium_page.pyi
index 6be88c5..a274411 100644
--- a/DrissionPage/chromium_page.pyi
+++ b/DrissionPage/chromium_page.pyi
@@ -151,8 +151,8 @@ class Alert(object):
 class WindowSetter(object):
 
     def __init__(self, page: ChromiumPage):
-        self.driver: ChromiumDriver = ...
-        self.window_id: str = ...
+        self._page: ChromiumPage = ...
+        self._window_id: str = ...
 
     def maximized(self) -> None: ...
 
diff --git a/DrissionPage/functions/tools.py b/DrissionPage/functions/tools.py
index 4b1b9cc..1661d85 100644
--- a/DrissionPage/functions/tools.py
+++ b/DrissionPage/functions/tools.py
@@ -149,3 +149,7 @@ def unzip(zip_path, to_path):
 
     with ZipFile(zip_path, 'r') as f:
         return [f.extract(f.namelist()[0], path=to_path)]
+
+
+class AlertExistsError(Exception):
+    pass
diff --git a/DrissionPage/functions/tools.pyi b/DrissionPage/functions/tools.pyi
index a3673cb..5d4ec05 100644
--- a/DrissionPage/functions/tools.pyi
+++ b/DrissionPage/functions/tools.pyi
@@ -29,3 +29,6 @@ def clean_folder(folder_path: Union[str, Path], ignore: list = None) -> None: ..
 
 
 def unzip(zip_path: str, to_path: str) -> Union[list, None]: ...
+
+
+class AlertExistsError(Exception): ...