4.0.0b21run_js()等待环境；

DrissionPage/__init__.py

@@ -13,4 +13,4 @@ from ._configs.chromium_options import ChromiumOptions
 from ._configs.session_options import SessionOptions
 
 __all__ = ['ChromiumPage', 'ChromiumOptions', 'SessionOptions', 'SessionPage', 'WebPage', '__version__']
-__version__ = '4.0.0b20'
+__version__ = '4.0.0b21'

DrissionPage/_elements/chromium_element.py

@@ -1279,13 +1279,19 @@ def run_js(page_or_ele, script, as_expr=False, timeout=None, args=None):
     :return: js执行结果
     """
     if isinstance(page_or_ele, (ChromiumElement, ShadowRoot)):
+        is_page = False
         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
+        page = page_or_ele
+        end_time = perf_counter() + 5
+        while perf_counter() < end_time:
+            obj_id = page_or_ele._root_id
+            if obj_id is not None:
+                break
+        else:
+            raise RuntimeError('js运行环境出错。')
 
     if page.states.has_alert:
         raise AlertExistsError

DrissionPage/_pages/chromium_base.py

@@ -155,9 +155,12 @@ class ChromiumBase(BasePage):
             return
         timeout = timeout if timeout >= .5 else .5
         self._is_reading = True
+        end_time = perf_counter() + timeout
         try:
             b_id = self.run_cdp('DOM.getDocument', _timeout=timeout)['root']['backendNodeId']
-            self._root_id = self.run_cdp('DOM.resolveNode', backendNodeId=b_id, _timeout=1)['object']['objectId']
+            timeout = end_time - perf_counter()
+            timeout = .5 if timeout < 0 else timeout
+            self._root_id = self.run_cdp('DOM.resolveNode', backendNodeId=b_id, _timeout=timeout)['object']['objectId']
 
             r = self.run_cdp('Page.getFrameTree')
             for i in findall(r"'id': '(.*?)'", str(r)):
@@ -168,8 +171,10 @@ class ChromiumBase(BasePage):
 
         except:
             if self._debug:
-                print('获取文档失败')
-            return False
+                print('获取文档失败。')
+            print('请把报错信息和重现方法告知作者，感谢。\nhttps://gitee.com/g1879/DrissionPage/issues/new')
+            raise
+            # return False
 
         finally:
             self._is_loading = False

setup.py

@@ -6,7 +6,7 @@ with open("README.md", "r", encoding='utf-8') as fh:
 
 setup(
     name="DrissionPage",
-    version="4.0.0b20",
+    version="4.0.0b21",
     author="g1879",
     author_email="g1879@qq.com",
     description="Python based web automation tool. It can control the browser and send and receive data packets.",