Pass Arguments to jinja Template

eel/__init__.py

@@ -447,7 +447,8 @@ def _static(path: str) -> btl.Response:
         if path.startswith(template_prefix):
             n = len(template_prefix)
             template = _start_args['jinja_env'].get_template(path[n:])
-            response = btl.HTTPResponse(template.render())
+            # Pass the context variables to the template
+            response = btl.HTTPResponse(template.render(**_context.get_all()))
 
     if response is None:
         response = btl.static_file(path, root=root_path)
@@ -646,3 +647,47 @@ def _set_response_headers(response: btl.Response) -> None:
     if _start_args['disable_cache']:
         # https://stackoverflow.com/a/24748094/280852
         response.set_header('Cache-Control', 'no-store')
+
+
+class Context:
+    '''Class to manage variables that will be passed to Jinja templates.
+
+    This class provides a way to store and retrieve variables that will be made
+    available to Jinja templates when they are rendered.
+    '''
+
+    def __init__(self) -> None:
+        self._variables: Dict[str, Any] = {}
+
+    def set(self, name: str, value: Any) -> None:
+        '''Set a variable that will be available in Jinja templates.
+
+        :param name: Name of the variable to be used in templates.
+        :param value: Value to associate with the variable name.
+        '''
+        self._variables[name] = value
+
+    def get(self, name: str) -> Any:
+        '''Get a variable value by name.
+
+        :param name: Name of the variable to retrieve.
+        :returns: The value associated with the variable name.
+        '''
+        return self._variables.get(name)
+
+    def get_all(self) -> Dict[str, Any]:
+        '''Get all variables as a dictionary.
+
+        :returns: Dictionary of all variable names and values.
+        '''
+        return self._variables.copy()
+
+# Add after the existing global variables
+_context: Context = Context()
+
+def get_context() -> Context:
+    '''Get the global Context instance for setting template variables.
+
+    :returns: The global Context instance.
+    '''
+    return _context

examples/06 - jinja_templates/hello.py

@@ -4,6 +4,10 @@
 
 eel.init('web')                     # Give folder containing web files
 
+context = eel.get_context()
+context.set('users', ['Alice', 'Bob', 'Charlie'])
+context.set('title', 'Hello from Eel!')
+
 @eel.expose
 def py_random():
     return random.random()

examples/06 - jinja_templates/web/templates/hello.html

@@ -21,7 +21,14 @@
     eel.say_hello_py("Javascript World!");  // Call a Python function
 {% endblock %}
 {% block content %}
-    Hello, World!
-    <br />
+    <h1>{{ title }}</h1>
+
+    <h2>Users:</h2>
+    <ul>
+    {% for user in users %}
+        <li>{{ user }}</li>
+    {% endfor %}
+    </ul>
+
     <a href="page2.html">Page 2</a>
-{% endblock %}
+{% endblock %}

tests/integration/test_examples.py

@@ -59,8 +59,21 @@ def test_06_jinja_templates(driver: webdriver.Remote):
         driver.get(eel_url)
         assert driver.title == "Hello, World!"
 
+        h1_element = driver.find_element(By.CSS_SELECTOR, 'h1')
+        assert h1_element.text == "Hello from Eel!"
+
+        user_elements = driver.find_elements(By.CSS_SELECTOR, 'ul li')
+        expected_users = ['Alice', 'Bob', 'Charlie']
+
+        assert len(user_elements) == len(expected_users), "Number of rendered users doesn't match expected"
+
+        for user_elem, expected_user in zip(user_elements, expected_users):
+            assert user_elem.text == expected_user, f"Expected user {expected_user}, got {user_elem.text}"
+
         driver.find_element(By.CSS_SELECTOR, 'a').click()
-        WebDriverWait(driver, 2.0).until(expected_conditions.presence_of_element_located((By.XPATH, '//h1[text()="This is page 2"]')))
+        WebDriverWait(driver, 2.0).until(
+            expected_conditions.presence_of_element_located((By.XPATH, '//h1[text()="This is page 2"]'))
+        )
 
 
 def test_10_custom_app(driver: webdriver.Remote):