Remove wrong event handlers (#4136)

* remove wrong target value

* add keyboard event

* simplify empty ones

* remove events from text_area

* empty tuples are empty bruh

* dangit darglint

reflex/components/base/script.py

@@ -8,7 +8,7 @@ from __future__ import annotations
 from typing import Literal
 
 from reflex.components.component import Component
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.vars.base import LiteralVar, Var
 
 
@@ -35,13 +35,13 @@ class Script(Component):
     )
 
     # Triggered when the script is loading
-    on_load: EventHandler[lambda: []]
+    on_load: EventHandler[empty_event]
 
     # Triggered when the script has loaded
-    on_ready: EventHandler[lambda: []]
+    on_ready: EventHandler[empty_event]
 
     # Triggered when the script has errored
-    on_error: EventHandler[lambda: []]
+    on_error: EventHandler[empty_event]
 
     @classmethod
     def create(cls, *children, **props) -> Component:

reflex/components/datadisplay/dataeditor.py

@@ -8,7 +8,7 @@ from typing import Any, Dict, List, Literal, Optional, Union
 from reflex.base import Base
 from reflex.components.component import Component, NoSSRComponent
 from reflex.components.literals import LiteralRowMarker
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.utils import console, format, types
 from reflex.utils.imports import ImportDict, ImportVar
 from reflex.utils.serializers import serializer
@@ -262,10 +262,10 @@ class DataEditor(NoSSRComponent):
     on_finished_editing: EventHandler[lambda new_value, movement: [new_value, movement]]
 
     # Fired when a row is appended.
-    on_row_appended: EventHandler[lambda: []]
+    on_row_appended: EventHandler[empty_event]
 
     # Fired when the selection is cleared.
-    on_selection_cleared: EventHandler[lambda: []]
+    on_selection_cleared: EventHandler[empty_event]
 
     # Fired when a column is resized.
     on_column_resize: EventHandler[lambda col, width: [col, width]]

reflex/components/el/elements/forms.py

@@ -10,7 +10,13 @@ from jinja2 import Environment
 from reflex.components.el.element import Element
 from reflex.components.tags.tag import Tag
 from reflex.constants import Dirs, EventTriggers
-from reflex.event import EventChain, EventHandler, prevent_default
+from reflex.event import (
+    EventChain,
+    EventHandler,
+    input_event,
+    key_event,
+    prevent_default,
+)
 from reflex.utils.imports import ImportDict
 from reflex.vars import VarData
 from reflex.vars.base import LiteralVar, Var
@@ -345,19 +351,19 @@ class Input(BaseHTML):
     value: Var[Union[str, int, float]]
 
     # Fired when the input value changes
-    on_change: EventHandler[lambda e0: [e0.target.value]]
+    on_change: EventHandler[input_event]
 
     # Fired when the input gains focus
-    on_focus: EventHandler[lambda e0: [e0.target.value]]
+    on_focus: EventHandler[input_event]
 
     # Fired when the input loses focus
-    on_blur: EventHandler[lambda e0: [e0.target.value]]
+    on_blur: EventHandler[input_event]
 
     # Fired when a key is pressed down
-    on_key_down: EventHandler[lambda e0: [e0.key]]
+    on_key_down: EventHandler[key_event]
 
     # Fired when a key is released
-    on_key_up: EventHandler[lambda e0: [e0.key]]
+    on_key_up: EventHandler[key_event]
 
 
 class Label(BaseHTML):
@@ -496,7 +502,7 @@ class Select(BaseHTML):
     size: Var[Union[str, int, bool]]
 
     # Fired when the select value changes
-    on_change: EventHandler[lambda e0: [e0.target.value]]
+    on_change: EventHandler[input_event]
 
 
 AUTO_HEIGHT_JS = """
@@ -586,19 +592,19 @@ class Textarea(BaseHTML):
     wrap: Var[Union[str, int, bool]]
 
     # Fired when the input value changes
-    on_change: EventHandler[lambda e0: [e0.target.value]]
+    on_change: EventHandler[input_event]
 
     # Fired when the input gains focus
-    on_focus: EventHandler[lambda e0: [e0.target.value]]
+    on_focus: EventHandler[input_event]
 
     # Fired when the input loses focus
-    on_blur: EventHandler[lambda e0: [e0.target.value]]
+    on_blur: EventHandler[input_event]
 
     # Fired when a key is pressed down
-    on_key_down: EventHandler[lambda e0: [e0.key]]
+    on_key_down: EventHandler[key_event]
 
     # Fired when a key is released
-    on_key_up: EventHandler[lambda e0: [e0.key]]
+    on_key_up: EventHandler[key_event]
 
     def _exclude_props(self) -> list[str]:
         return super()._exclude_props() + [

reflex/components/next/image.py

@@ -2,7 +2,7 @@
 
 from typing import Any, Literal, Optional, Union
 
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.utils import types
 from reflex.vars.base import Var
 
@@ -56,10 +56,10 @@ class Image(NextComponent):
     blurDataURL: Var[str]
 
     # Fires when the image has loaded.
-    on_load: EventHandler[lambda: []]
+    on_load: EventHandler[empty_event]
 
     # Fires when the image has an error.
-    on_error: EventHandler[lambda: []]
+    on_error: EventHandler[empty_event]
 
     @classmethod
     def create(

reflex/components/radix/primitives/drawer.py

@@ -11,6 +11,7 @@ from reflex.components.radix.primitives.base import RadixPrimitiveComponent
 from reflex.components.radix.themes.base import Theme
 from reflex.components.radix.themes.layout.flex import Flex
 from reflex.event import EventHandler
+from reflex.utils import console
 from reflex.vars.base import Var
 
 
@@ -127,20 +128,20 @@ class DrawerContent(DrawerComponent):
         base_style.update(style)
         return {"css": base_style}
 
-    # Fired when the drawer content is opened.
+    # Fired when the drawer content is opened. Deprecated.
-    on_open_auto_focus: EventHandler[lambda e0: [e0.target.value]]
+    on_open_auto_focus: EventHandler[lambda e0: []]
 
-    # Fired when the drawer content is closed.
+    # Fired when the drawer content is closed. Deprecated.
-    on_close_auto_focus: EventHandler[lambda e0: [e0.target.value]]
+    on_close_auto_focus: EventHandler[lambda e0: []]
 
-    # Fired when the escape key is pressed.
+    # Fired when the escape key is pressed. Deprecated.
-    on_escape_key_down: EventHandler[lambda e0: [e0.target.value]]
+    on_escape_key_down: EventHandler[lambda e0: []]
 
-    # Fired when the pointer is down outside the drawer content.
+    # Fired when the pointer is down outside the drawer content. Deprecated.
-    on_pointer_down_outside: EventHandler[lambda e0: [e0.target.value]]
+    on_pointer_down_outside: EventHandler[lambda e0: []]
 
-    # Fired when interacting outside the drawer content.
+    # Fired when interacting outside the drawer content. Deprecated.
-    on_interact_outside: EventHandler[lambda e0: [e0.target.value]]
+    on_interact_outside: EventHandler[lambda e0: []]
 
     @classmethod
     def create(cls, *children, **props):
@@ -157,6 +158,23 @@ class DrawerContent(DrawerComponent):
         Returns:
                  The drawer content.
         """
+        deprecated_properties = [
+            "on_open_auto_focus",
+            "on_close_auto_focus",
+            "on_escape_key_down",
+            "on_pointer_down_outside",
+            "on_interact_outside",
+        ]
+
+        for prop in deprecated_properties:
+            if prop in props:
+                console.deprecate(
+                    feature_name="drawer content events",
+                    reason=f"The `{prop}` event is deprecated and will be removed in 0.7.0.",
+                    deprecation_version="0.6.3",
+                    removal_version="0.7.0",
+                )
+
         comp = super().create(*children, **props)
 
         return Theme.create(comp)

reflex/components/radix/primitives/form.py

@@ -8,7 +8,7 @@ from reflex.components.component import ComponentNamespace
 from reflex.components.core.debounce import DebounceInput
 from reflex.components.el.elements.forms import Form as HTMLForm
 from reflex.components.radix.themes.components.text_field import TextFieldRoot
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.vars.base import Var
 
 from .base import RadixPrimitiveComponentWithClassName
@@ -28,7 +28,7 @@ class FormRoot(FormComponent, HTMLForm):
     alias = "RadixFormRoot"
 
     # Fired when the errors are cleared.
-    on_clear_server_errors: EventHandler[lambda: []]
+    on_clear_server_errors: EventHandler[empty_event]
 
     def add_style(self) -> dict[str, Any] | None:
         """Add style to the component.

reflex/components/radix/themes/components/dropdown_menu.py

@@ -164,7 +164,7 @@ class DropdownMenuSub(RadixThemesComponent):
     default_open: Var[bool]
 
     # Fired when the open state changes.
-    on_open_change: EventHandler[lambda e0: [e0.target.value]]
+    on_open_change: EventHandler[lambda e0: [e0]]
 
 
 class DropdownMenuSubContent(RadixThemesComponent):
@@ -240,7 +240,7 @@ class DropdownMenuItem(RadixThemesComponent):
     _valid_parents: List[str] = ["DropdownMenuContent", "DropdownMenuSubContent"]
 
     # Fired when the item is selected.
-    on_select: EventHandler[lambda e0: [e0.target.value]]
+    on_select: EventHandler[lambda e0: []]
 
 
 class DropdownMenuSeparator(RadixThemesComponent):

reflex/components/radix/themes/components/text_area.py

@@ -6,7 +6,6 @@ from reflex.components.component import Component
 from reflex.components.core.breakpoints import Responsive
 from reflex.components.core.debounce import DebounceInput
 from reflex.components.el import elements
-from reflex.event import EventHandler
 from reflex.vars.base import Var
 
 from ..base import (
@@ -82,21 +81,6 @@ class TextArea(RadixThemesComponent, elements.Textarea):
     # How the text in the textarea is to be wrapped when submitting the form
     wrap: Var[str]
 
-    # Fired when the value of the textarea changes.
-    on_change: EventHandler[lambda e0: [e0.target.value]]
-
-    # Fired when the textarea is focused.
-    on_focus: EventHandler[lambda e0: [e0.target.value]]
-
-    # Fired when the textarea is blurred.
-    on_blur: EventHandler[lambda e0: [e0.target.value]]
-
-    # Fired when a key is pressed down.
-    on_key_down: EventHandler[lambda e0: [e0.key]]
-
-    # Fired when a key is released.
-    on_key_up: EventHandler[lambda e0: [e0.key]]
-
     @classmethod
     def create(cls, *children, **props) -> Component:
         """Create an Input component.

reflex/components/radix/themes/components/text_field.py

@@ -8,7 +8,7 @@ from reflex.components.component import Component, ComponentNamespace
 from reflex.components.core.breakpoints import Responsive
 from reflex.components.core.debounce import DebounceInput
 from reflex.components.el import elements
-from reflex.event import EventHandler
+from reflex.event import EventHandler, input_event, key_event
 from reflex.vars.base import Var
 
 from ..base import (
@@ -72,19 +72,19 @@ class TextFieldRoot(elements.Div, RadixThemesComponent):
     value: Var[Union[str, int, float]]
 
     # Fired when the value of the textarea changes.
-    on_change: EventHandler[lambda e0: [e0.target.value]]
+    on_change: EventHandler[input_event]
 
     # Fired when the textarea is focused.
-    on_focus: EventHandler[lambda e0: [e0.target.value]]
+    on_focus: EventHandler[input_event]
 
     # Fired when the textarea is blurred.
-    on_blur: EventHandler[lambda e0: [e0.target.value]]
+    on_blur: EventHandler[input_event]
 
     # Fired when a key is pressed down.
-    on_key_down: EventHandler[lambda e0: [e0.key]]
+    on_key_down: EventHandler[key_event]
 
     # Fired when a key is released.
-    on_key_up: EventHandler[lambda e0: [e0.key]]
+    on_key_up: EventHandler[key_event]
 
     @classmethod
     def create(cls, *children, **props) -> Component:

reflex/components/radix/themes/components/tooltip.py

@@ -85,13 +85,13 @@ class Tooltip(RadixThemesComponent):
     aria_label: Var[str]
 
     # Fired when the open state changes.
-    on_open_change: EventHandler[lambda e0: [e0.target.value]]
+    on_open_change: EventHandler[lambda e0: [e0]]
 
     # Fired when the escape key is pressed.
-    on_escape_key_down: EventHandler[lambda e0: [e0.target.value]]
+    on_escape_key_down: EventHandler[lambda e0: []]
 
     # Fired when the pointer is down outside the tooltip.
-    on_pointer_down_outside: EventHandler[lambda e0: [e0.target.value]]
+    on_pointer_down_outside: EventHandler[lambda e0: []]
 
     @classmethod
     def create(cls, *children, **props) -> Component:

reflex/components/react_player/react_player.py

@@ -3,7 +3,7 @@
 from __future__ import annotations
 
 from reflex.components.component import NoSSRComponent
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.vars.base import Var
 
 
@@ -46,13 +46,13 @@ class ReactPlayer(NoSSRComponent):
     height: Var[str]
 
     # Called when media is loaded and ready to play. If playing is set to true, media will play immediately.
-    on_ready: EventHandler[lambda: []]
+    on_ready: EventHandler[empty_event]
 
     # Called when media starts playing.
-    on_start: EventHandler[lambda: []]
+    on_start: EventHandler[empty_event]
 
     # Called when media starts or resumes playing after pausing or buffering.
-    on_play: EventHandler[lambda: []]
+    on_play: EventHandler[empty_event]
 
     # Callback containing played and loaded progress as a fraction, and playedSeconds and loadedSeconds in seconds. eg { played: 0.12, playedSeconds: 11.3, loaded: 0.34, loadedSeconds: 16.7 }
     on_progress: EventHandler[lambda progress: [progress]]
@@ -61,13 +61,13 @@ class ReactPlayer(NoSSRComponent):
     on_duration: EventHandler[lambda seconds: [seconds]]
 
     # Called when media is paused.
-    on_pause: EventHandler[lambda: []]
+    on_pause: EventHandler[empty_event]
 
     # Called when media starts buffering.
-    on_buffer: EventHandler[lambda: []]
+    on_buffer: EventHandler[empty_event]
 
     # Called when media has finished buffering. Works for files, YouTube and Facebook.
-    on_buffer_end: EventHandler[lambda: []]
+    on_buffer_end: EventHandler[empty_event]
 
     # Called when media seeks with seconds parameter.
     on_seek: EventHandler[lambda seconds: [seconds]]
@@ -79,16 +79,16 @@ class ReactPlayer(NoSSRComponent):
     on_playback_quality_change: EventHandler[lambda e0: []]
 
     # Called when media finishes playing. Does not fire when loop is set to true.
-    on_ended: EventHandler[lambda: []]
+    on_ended: EventHandler[empty_event]
 
     # Called when an error occurs whilst attempting to play media.
-    on_error: EventHandler[lambda: []]
+    on_error: EventHandler[empty_event]
 
     # Called when user clicks the light mode preview.
-    on_click_preview: EventHandler[lambda: []]
+    on_click_preview: EventHandler[empty_event]
 
     # Called when picture-in-picture mode is enabled.
-    on_enable_pip: EventHandler[lambda: []]
+    on_enable_pip: EventHandler[empty_event]
 
     # Called when picture-in-picture mode is disabled.
-    on_disable_pip: EventHandler[lambda: []]
+    on_disable_pip: EventHandler[empty_event]

reflex/components/recharts/cartesian.py

@@ -6,7 +6,7 @@ from typing import Any, Dict, List, Union
 
 from reflex.constants import EventTriggers
 from reflex.constants.colors import Color
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.vars.base import LiteralVar, Var
 
 from .recharts import (
@@ -101,25 +101,25 @@ class Axis(Recharts):
     text_anchor: Var[str]  # 'start', 'middle', 'end'
 
     # The customized event handler of click on the ticks of this axis
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mousedown on the ticks of this axis
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the ticks of this axis
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the ticks of this axis
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the ticks of this axis
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
     # The customized event handler of mouseenter on the ticks of this axis
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the ticks of this axis
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
 
 class XAxis(Axis):
@@ -267,28 +267,28 @@ class Cartesian(Recharts):
     legend_type: Var[LiteralLegendType]
 
     # The customized event handler of click on the component in this group
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mousedown on the component in this group
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the component in this group
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the component in this group
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseover on the component in this group
-    on_mouse_over: EventHandler[lambda: []]
+    on_mouse_over: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the component in this group
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
     # The customized event handler of mouseenter on the component in this group
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the component in this group
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
 
 class Area(Cartesian):
@@ -494,28 +494,28 @@ class Scatter(Recharts):
     animation_easing: Var[LiteralAnimationEasing]
 
     # The customized event handler of click on the component in this group
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mousedown on the component in this group
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the component in this group
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the component in this group
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseover on the component in this group
-    on_mouse_over: EventHandler[lambda: []]
+    on_mouse_over: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the component in this group
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
     # The customized event handler of mouseenter on the component in this group
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the component in this group
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
 
 class Funnel(Recharts):
@@ -556,34 +556,34 @@ class Funnel(Recharts):
     _valid_children: List[str] = ["LabelList", "Cell"]
 
     # The customized event handler of animation start
-    on_animation_start: EventHandler[lambda: []]
+    on_animation_start: EventHandler[empty_event]
 
     # The customized event handler of animation end
-    on_animation_end: EventHandler[lambda: []]
+    on_animation_end: EventHandler[empty_event]
 
     # The customized event handler of click on the component in this group
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mousedown on the component in this group
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the component in this group
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the component in this group
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseover on the component in this group
-    on_mouse_over: EventHandler[lambda: []]
+    on_mouse_over: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the component in this group
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
     # The customized event handler of mouseenter on the component in this group
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the component in this group
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
 
 class ErrorBar(Recharts):
@@ -680,28 +680,28 @@ class ReferenceDot(Reference):
     _valid_children: List[str] = ["Label"]
 
     # The customized event handler of click on the component in this chart
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mousedown on the component in this chart
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the component in this chart
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mouseover on the component in this chart
-    on_mouse_over: EventHandler[lambda: []]
+    on_mouse_over: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the component in this chart
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
     # The customized event handler of mouseenter on the component in this chart
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the component in this chart
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the component in this chart
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
 
 class ReferenceArea(Recharts):

reflex/components/recharts/charts.py

@@ -8,7 +8,7 @@ from reflex.components.component import Component
 from reflex.components.recharts.general import ResponsiveContainer
 from reflex.constants import EventTriggers
 from reflex.constants.colors import Color
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.vars.base import Var
 
 from .recharts import (
@@ -31,16 +31,16 @@ class ChartBase(RechartsCharts):
     height: Var[Union[str, int]] = "100%"  # type: ignore
 
     # The customized event handler of click on the component in this chart
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mouseenter on the component in this chart
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the component in this chart
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the component in this chart
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
     @staticmethod
     def _ensure_valid_dimension(name: str, value: Any) -> None:
@@ -270,16 +270,16 @@ class PieChart(ChartBase):
     ]
 
     # The customized event handler of mousedown on the sectors in this group
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the sectors in this group
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mouseover on the sectors in this group
-    on_mouse_over: EventHandler[lambda: []]
+    on_mouse_over: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the sectors in this group
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
 
 class RadarChart(ChartBase):
@@ -488,10 +488,10 @@ class Treemap(RechartsCharts):
     animation_easing: Var[LiteralAnimationEasing]
 
     # The customized event handler of animation start
-    on_animation_start: EventHandler[lambda: []]
+    on_animation_start: EventHandler[empty_event]
 
     # The customized event handler of animation end
-    on_animation_end: EventHandler[lambda: []]
+    on_animation_end: EventHandler[empty_event]
 
     @classmethod
     def create(cls, *children, **props) -> Component:

reflex/components/recharts/general.py

@@ -6,7 +6,7 @@ from typing import Any, Dict, List, Union
 
 from reflex.components.component import MemoizationLeaf
 from reflex.constants.colors import Color
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.vars.base import LiteralVar, Var
 
 from .recharts import (
@@ -46,7 +46,7 @@ class ResponsiveContainer(Recharts, MemoizationLeaf):
     debounce: Var[int]
 
     # If specified provides a callback providing the updated chart width and height values.
-    on_resize: EventHandler[lambda: []]
+    on_resize: EventHandler[empty_event]
 
     # Valid children components
     _valid_children: List[str] = [
@@ -104,28 +104,28 @@ class Legend(Recharts):
     margin: Var[Dict[str, Any]]
 
     # The customized event handler of click on the items in this group
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mousedown on the items in this group
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the items in this group
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the items in this group
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseover on the items in this group
-    on_mouse_over: EventHandler[lambda: []]
+    on_mouse_over: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the items in this group
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
     # The customized event handler of mouseenter on the items in this group
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the items in this group
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
 
 class GraphingTooltip(Recharts):

reflex/components/recharts/polar.py

@@ -6,7 +6,7 @@ from typing import Any, Dict, List, Union
 
 from reflex.constants import EventTriggers
 from reflex.constants.colors import Color
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event
 from reflex.vars.base import LiteralVar, Var
 
 from .recharts import (
@@ -253,28 +253,28 @@ class PolarAngleAxis(Recharts):
     _valid_children: List[str] = ["Label"]
 
     # The customized event handler of click on the ticks of this axis.
-    on_click: EventHandler[lambda: []]
+    on_click: EventHandler[empty_event]
 
     # The customized event handler of mousedown on the the ticks of this axis.
-    on_mouse_down: EventHandler[lambda: []]
+    on_mouse_down: EventHandler[empty_event]
 
     # The customized event handler of mouseup on the ticks of this axis.
-    on_mouse_up: EventHandler[lambda: []]
+    on_mouse_up: EventHandler[empty_event]
 
     # The customized event handler of mousemove on the ticks of this axis.
-    on_mouse_move: EventHandler[lambda: []]
+    on_mouse_move: EventHandler[empty_event]
 
     # The customized event handler of mouseover on the ticks of this axis.
-    on_mouse_over: EventHandler[lambda: []]
+    on_mouse_over: EventHandler[empty_event]
 
     # The customized event handler of mouseout on the ticks of this axis.
-    on_mouse_out: EventHandler[lambda: []]
+    on_mouse_out: EventHandler[empty_event]
 
     # The customized event handler of moustenter on the ticks of this axis.
-    on_mouse_enter: EventHandler[lambda: []]
+    on_mouse_enter: EventHandler[empty_event]
 
     # The customized event handler of mouseleave on the ticks of this axis.
-    on_mouse_leave: EventHandler[lambda: []]
+    on_mouse_leave: EventHandler[empty_event]
 
 
 class PolarGrid(Recharts):

reflex/event.py

@@ -24,7 +24,7 @@ from typing import (
 from typing_extensions import get_args, get_origin
 
 from reflex import constants
-from reflex.utils import format
+from reflex.utils import console, format
 from reflex.utils.exceptions import EventFnArgMismatch, EventHandlerArgMismatch
 from reflex.utils.types import ArgsSpec, GenericType
 from reflex.vars import VarData
@@ -399,23 +399,63 @@ prevent_default = EventChain(events=[], args_spec=lambda: []).prevent_default
     init=True,
     frozen=True,
 )
-class Target:
+class JavascriptHTMLInputElement:
-    """A Javascript event target."""
+    """Interface for a Javascript HTMLInputElement https://developer.mozilla.org/en-US/docs/Web/API/HTMLInputElement."""
 
-    checked: bool = False
+    value: str = ""
-    value: Any = None
 
 
 @dataclasses.dataclass(
     init=True,
     frozen=True,
 )
-class FrontendEvent:
+class JavascriptInputEvent:
-    """A Javascript event."""
+    """Interface for a Javascript InputEvent https://developer.mozilla.org/en-US/docs/Web/API/InputEvent."""
+
+    target: JavascriptHTMLInputElement = JavascriptHTMLInputElement()
+
+
+@dataclasses.dataclass(
+    init=True,
+    frozen=True,
+)
+class JavasciptKeyboardEvent:
+    """Interface for a Javascript KeyboardEvent https://developer.mozilla.org/en-US/docs/Web/API/KeyboardEvent."""
 
-    target: Target = Target()
     key: str = ""
-    value: Any = None
+
+
+def input_event(e: Var[JavascriptInputEvent]) -> Tuple[str]:
+    """Get the value from an input event.
+
+    Args:
+        e: The input event.
+
+    Returns:
+        The value from the input event.
+    """
+    return (e.target.value,)
+
+
+def key_event(e: Var[JavasciptKeyboardEvent]) -> Tuple[str]:
+    """Get the key from a keyboard event.
+
+    Args:
+        e: The keyboard event.
+
+    Returns:
+        The key from the keyboard event.
+    """
+    return (e.key,)
+
+
+def empty_event() -> Tuple[()]:
+    """Empty event handler.
+
+    Returns:
+        An empty tuple.
+    """
+    return tuple()  # type: ignore
 
 
 @dataclasses.dataclass(
@@ -946,6 +986,28 @@ def unwrap_var_annotation(annotation: GenericType):
     return annotation
 
 
+def resolve_annotation(annotations: dict[str, Any], arg_name: str):
+    """Resolve the annotation for the given argument name.
+
+    Args:
+        annotations: The annotations.
+        arg_name: The argument name.
+
+    Returns:
+        The resolved annotation.
+    """
+    annotation = annotations.get(arg_name)
+    if annotation is None:
+        console.deprecate(
+            feature_name="Unannotated event handler arguments",
+            reason="Provide type annotations for event handler arguments.",
+            deprecation_version="0.6.3",
+            removal_version="0.7.0",
+        )
+        return JavascriptInputEvent
+    return annotation
+
+
 def parse_args_spec(arg_spec: ArgsSpec):
     """Parse the args provided in the ArgsSpec of an event trigger.
 
@@ -961,7 +1023,7 @@ def parse_args_spec(arg_spec: ArgsSpec):
     return arg_spec(
         *[
             Var(f"_{l_arg}").to(
-                unwrap_var_annotation(annotations.get(l_arg, FrontendEvent))
+                unwrap_var_annotation(resolve_annotation(annotations, l_arg))
             )
             for l_arg in spec.args
         ]

tests/units/components/test_component.py

@@ -16,7 +16,13 @@ from reflex.components.component import (
 )
 from reflex.components.radix.themes.layout.box import Box
 from reflex.constants import EventTriggers
-from reflex.event import EventChain, EventHandler, parse_args_spec
+from reflex.event import (
+    EventChain,
+    EventHandler,
+    empty_event,
+    input_event,
+    parse_args_spec,
+)
 from reflex.state import BaseState
 from reflex.style import Style
 from reflex.utils import imports
@@ -1778,7 +1784,7 @@ def test_custom_component_declare_event_handlers_in_fields():
             return {
                 **super().get_event_triggers(),
                 "on_a": lambda e0: [e0],
-                "on_b": lambda e0: [e0.target.value],
+                "on_b": input_event,
                 "on_c": lambda e0: [],
                 "on_d": lambda: [],
                 "on_e": lambda: [],
@@ -1787,9 +1793,9 @@ def test_custom_component_declare_event_handlers_in_fields():
 
     class TestComponent(Component):
         on_a: EventHandler[lambda e0: [e0]]
-        on_b: EventHandler[lambda e0: [e0.target.value]]
+        on_b: EventHandler[input_event]
         on_c: EventHandler[lambda e0: []]
-        on_d: EventHandler[lambda: []]
+        on_d: EventHandler[empty_event]
         on_e: EventHandler
         on_f: EventHandler[lambda a, b, c: [c, b, a]]
 

tests/units/components/test_component_future_annotations.py

@@ -3,7 +3,7 @@ from __future__ import annotations
 from typing import Any
 
 from reflex.components.component import Component
-from reflex.event import EventHandler
+from reflex.event import EventHandler, empty_event, input_event
 
 
 # This is a repeat of its namesake in test_component.py.
@@ -25,9 +25,9 @@ def test_custom_component_declare_event_handlers_in_fields():
 
     class TestComponent(Component):
         on_a: EventHandler[lambda e0: [e0]]
-        on_b: EventHandler[lambda e0: [e0.target.value]]
+        on_b: EventHandler[input_event]
         on_c: EventHandler[lambda e0: []]
-        on_d: EventHandler[lambda: []]
+        on_d: EventHandler[empty_event]
 
     custom_component = ReferenceComponent.create()
     test_component = TestComponent.create()

tests/units/utils/test_format.py

@@ -8,7 +8,7 @@ import plotly.graph_objects as go
 import pytest
 
 from reflex.components.tags.tag import Tag
-from reflex.event import EventChain, EventHandler, EventSpec, FrontendEvent
+from reflex.event import EventChain, EventHandler, EventSpec, JavascriptInputEvent
 from reflex.style import Style
 from reflex.utils import format
 from reflex.utils.serializers import serialize_figure
@@ -387,7 +387,7 @@ def test_format_match(
                                 Var(
                                     _js_expr="_e",
                                 )
-                                .to(ObjectVar, FrontendEvent)
+                                .to(ObjectVar, JavascriptInputEvent)
                                 .target.value,
                             ),
                         ),