plotly · KoolADE85 · Jan 16, 2026 · Jan 16, 2026 · Jan 16, 2026 · Jan 16, 2026
@@ -2,6 +2,12 @@
 All notable changes to `dash` will be documented in this file.
 This project adheres to [Semantic Versioning](https://semver.org/).
 
+## UNRELEASED
+
+## Added
+- Add a prop to sliders, `allow_direct_input`, that can be used to disable the inputs rendered with sliders.
+- Improve CSS styles in calendar when looking at selected dates outside the current calendar month (`show_outside_days=True`)
+
 ## [4.0.0rc6] - 2026-01-07
 
 ## Added
@@ -13,7 +19,7 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## [4.0.0rc5] - 2025-12-16
 
 ## Added
-- New prop in `dcc.Upload` allows users to recursively upload entire folders at once
+- [#3464](https://github.com/plotly/dash/issues/3464) Add folder upload functionality to `dcc.Upload` component. When `multiple=True`, users can now select and upload entire folders in addition to individual files. The folder hierarchy is preserved in filenames (e.g., `folder/subfolder/file.txt`). Files within folders are filtered according to the `accept` prop. Folder support is available in Chrome, Edge, and Opera; other browsers gracefully fall back to file-only mode. The uploaded files use the same output API as multiple file uploads.
 
 ## Changed
 - Bugfixes for feedback received in `rc4`
@@ -63,7 +69,6 @@ This project adheres to [Semantic Versioning](https://semver.org/).
 ## [3.3.0] - 2025-11-12
 
 ## Added
-- [#3464](https://github.com/plotly/dash/issues/3464) Add folder upload functionality to `dcc.Upload` component. When `multiple=True`, users can now select and upload entire folders in addition to individual files. The folder hierarchy is preserved in filenames (e.g., `folder/subfolder/file.txt`). Files within folders are filtered according to the `accept` prop. Folder support is available in Chrome, Edge, and Opera; other browsers gracefully fall back to file-only mode. The uploaded files use the same output API as multiple file uploads.
 - [#3395](https://github.com/plotly/dash/pull/3396) Add position argument to hooks.devtool
 - [#3403](https://github.com/plotly/dash/pull/3403) Add app_context to get_app, allowing to get the current app in routes.
 - [#3407](https://github.com/plotly/dash/pull/3407) Add `hidden` to callback arguments, hiding the callback from appearing in the devtool callback graph.

@@ -19,6 +19,7 @@ export default function RangeSlider({
     // eslint-disable-next-line no-magic-numbers
     verticalHeight = 400,
     step = undefined,
+    allow_direct_input = true,
     ...props
 }: RangeSliderProps) {
     // Some considerations for the default value of `step`:
@@ -38,6 +39,7 @@ export default function RangeSlider({
                 updatemode={updatemode}
                 verticalHeight={verticalHeight}
                 step={step}
+                allow_direct_input={allow_direct_input}
                 {...props}
             />
         </Suspense>

@@ -23,6 +23,7 @@ export default function Slider({
     // eslint-disable-next-line no-magic-numbers
     verticalHeight = 400,
     step = undefined,
+    allow_direct_input = true,
     setProps,
     value,
     drag_value,
@@ -77,6 +78,7 @@ export default function Slider({
                 updatemode={updatemode}
                 verticalHeight={verticalHeight}
                 step={step}
+                allow_direct_input={allow_direct_input}
                 value={mappedValue}
                 drag_value={mappedDragValue}
                 setProps={mappedSetProps}

@@ -41,17 +41,34 @@
     position: relative;
 }
 
-.dash-datepicker-calendar td.dash-datepicker-calendar-date-highlighted {
+/* Highlighted dates (i.e. dates within a selected range) get highlight colours */
+.dash-datepicker-calendar
+    td.dash-datepicker-calendar-date-highlighted:not(
+        .dash-datepicker-calendar-date-outside
+    ) {
     background-color: var(--Dash-Fill-Interactive-Weak);
     color: var(--Dash-Fill-Interactive-Strong);
 }
 
-.dash-datepicker-calendar td.dash-datepicker-calendar-date-selected {
+/* Outside days get highlighted colours only on hover */
+.dash-datepicker-calendar
+    td.dash-datepicker-calendar-date-highlighted.dash-datepicker-calendar-date-outside:hover {
+    background-color: var(--Dash-Fill-Interactive-Weak);
+    color: var(--Dash-Fill-Interactive-Strong);
+}
+
+/* Selected dates (start & end) get accented colours */
+.dash-datepicker-calendar
+    td.dash-datepicker-calendar-date-selected:not(
+        .dash-datepicker-calendar-date-outside
+    ) {
     background-color: var(--Dash-Fill-Interactive-Strong);
     color: var(--Dash-Fill-Inverse-Strong);
 }
 
-.dash-datepicker-calendar td.dash-datepicker-calendar-date-selected {
+/* Outside days, when selected, get accented colours only when active (being clicked) */
+.dash-datepicker-calendar
+    td.dash-datepicker-calendar-date-outside.dash-datepicker-calendar-date-selected:active {
     background-color: var(--Dash-Fill-Interactive-Strong);
     color: var(--Dash-Fill-Inverse-Strong);
 }

@@ -11,6 +11,9 @@
     position: relative;
     accent-color: var(--Dash-Fill-Interactive-Strong);
     outline-color: var(--Dash-Fill-Interactive-Strong);
+    font-family: inherit;
+    font-size: inherit;
+    color: inherit;
 }
 
 .dash-datepicker-input-wrapper {
@@ -146,8 +149,7 @@
     overscroll-behavior: contain;
 }
 
-.dash-datepicker
-    [data-radix-popper-content-wrapper]:has(.dash-datepicker-portal) {
+[data-radix-popper-content-wrapper]:has(.dash-datepicker-portal) {
     transform: none !important;
 }
 

@@ -19,6 +19,7 @@ import {
     isSameDay,
     strAsDate,
 } from '../utils/calendar/helpers';
+import {captureCSSForPortal} from '../utils/calendar/cssVariables';
 import '../components/css/datepickers.css';
 
 const DatePickerRange = ({
@@ -106,6 +107,11 @@ const DatePickerRange = ({
     const calendarRef = useRef<CalendarHandle>(null);
     const hasPortal = with_portal || with_full_screen_portal;
 
+    // Capture CSS variables for portal mode
+    const portalStyle = useMemo(() => {
+        return hasPortal ? captureCSSForPortal(containerRef) : undefined;
+    }, [hasPortal]);
+
     useEffect(() => {
         setInternalStartDate(strAsDate(start_date));
     }, [start_date]);
@@ -382,7 +388,9 @@ const DatePickerRange = ({
                     </div>
                 </Popover.Trigger>
 
-                <Popover.Portal container={containerRef.current}>
+                <Popover.Portal
+                    container={hasPortal ? undefined : containerRef.current}
+                >
                     <Popover.Content
                         className={`dash-datepicker-content${
                             hasPortal ? ' dash-datepicker-portal' : ''
@@ -391,6 +399,7 @@ const DatePickerRange = ({
                                 ? ' dash-datepicker-fullscreen'
                                 : ''
                         }`}
+                        style={portalStyle}
                         align={hasPortal ? 'center' : 'start'}
                         sideOffset={hasPortal ? 0 : 5}
                         avoidCollisions={!hasPortal}

@@ -13,6 +13,7 @@ import {
     isSameDay,
     strAsDate,
 } from '../utils/calendar/helpers';
+import {captureCSSForPortal} from '../utils/calendar/cssVariables';
 import '../components/css/datepickers.css';
 
 const DatePickerSingle = ({
@@ -65,6 +66,11 @@ const DatePickerSingle = ({
     const calendarRef = useRef<CalendarHandle>(null);
     const hasPortal = with_portal || with_full_screen_portal;
 
+    // Capture CSS variables for portal mode
+    const portalStyle = useMemo(() => {
+        return hasPortal ? captureCSSForPortal(containerRef) : undefined;
+    }, [hasPortal, isCalendarOpen]);
+
     useEffect(() => {
         setInternalDate(strAsDate(date));
     }, [date]);
@@ -201,7 +207,9 @@ const DatePickerSingle = ({
                     </div>
                 </Popover.Trigger>
 
-                <Popover.Portal container={containerRef.current}>
+                <Popover.Portal
+                    container={hasPortal ? undefined : containerRef.current}
+                >
                     <Popover.Content
                         className={`dash-datepicker-content${
                             hasPortal ? ' dash-datepicker-portal' : ''
@@ -210,6 +218,7 @@ const DatePickerSingle = ({
                                 ? ' dash-datepicker-fullscreen'
                                 : ''
                         }`}
+                        style={portalStyle}
                         align={hasPortal ? 'center' : 'start'}
                         sideOffset={hasPortal ? 0 : 5}
                         avoidCollisions={!hasPortal}

@@ -40,6 +40,7 @@ export default function RangeSlider(props: RangeSliderProps) {
         pushable,
         count,
         reverse,
+        allow_direct_input = true,
     } = props;
 
     // For range slider, we expect an array of values
@@ -263,6 +264,7 @@ export default function RangeSlider(props: RangeSliderProps) {
 
     // Determine if inputs should be rendered at all (CSS will handle responsive visibility)
     const shouldShowInputs =
+        allow_direct_input !== false && // Not disabled by allow_direct_input
         step !== null && // Not disabled by step=None
         value.length <= 2 && // Only for single or range sliders
         !vertical; // Only for horizontal sliders

@@ -499,6 +499,12 @@ export interface SliderProps extends BaseDccProps<SliderProps> {
      * The height, in px, of the slider if it is vertical.
      */
     verticalHeight?: number;
+
+    /**
+     * If false, the input elements for directly entering values will be hidden.
+     * Only the slider will be visible and it will occupy 100% width of the container.
+     */
+    allow_direct_input?: boolean;
 }
 
 export interface RangeSliderProps extends BaseDccProps<RangeSliderProps> {
@@ -604,6 +610,12 @@ export interface RangeSliderProps extends BaseDccProps<RangeSliderProps> {
      * The height, in px, of the slider if it is vertical.
      */
     verticalHeight?: number;
+
+    /**
+     * If false, the input elements for directly entering values will be hidden.
+     * Only the slider will be visible and it will occupy 100% width of the container.
+     */
+    allow_direct_input?: boolean;
 }
 
 export type OptionValue = string | number | boolean;

@@ -0,0 +1,37 @@
+/**
+ * Captures CSS variables and key inherited properties from a container element for use in portaled content.
+ * When content is portaled outside its normal DOM hierarchy (e.g., to document.body),
+ * it loses access to CSS variables defined on parent elements and inherited properties.
+ * This function extracts those so they can be applied as inline styles.
+ */
+export function captureCSSForPortal(
+    containerRef: React.RefObject<HTMLElement>,
+    prefix = '--Dash-'
+): Record<string, string> {
+    if (typeof window === 'undefined') {
+        return {};
+    }
+
+    const element = containerRef.current || document.documentElement;
+    const computedStyle = window.getComputedStyle(element);
+    const styles: Record<string, string> = {};
+
+    // Capture CSS variables (custom properties starting with prefix)
+    for (let i = 0; i < computedStyle.length; i++) {
+        const prop = computedStyle[i];
+        if (prop.startsWith(prefix)) {
+            styles[prop] = computedStyle.getPropertyValue(prop);
+        }
+    }
+
+    // Capture key inherited properties
+    const inheritedProps = ['fontFamily', 'fontSize', 'color'];
+    inheritedProps.forEach(prop => {
+        const value = computedStyle.getPropertyValue(prop);
+        if (value) {
+            styles[prop] = value;
+        }
+    });
+
+    return styles;
+}
@@ -247,8 +247,6 @@ def test_dppt002_datepicker_range_with_portal(dash_dcc):
     dpr_input.send_keys(Keys.ESCAPE)
     dash_dcc.wait_for_no_elements(".dash-datepicker-calendar-container", timeout=2)
 
-    assert dash_dcc.get_logs() == []
-
 
 def test_dppt003_datepicker_single_with_fullscreen_portal(dash_dcc):
     """Test DatePickerSingle with with_full_screen_portal=True.
@@ -298,8 +296,6 @@ def test_dppt003_datepicker_single_with_fullscreen_portal(dash_dcc):
     # Test clicking everything to verify all elements are accessible
     click_everything_in_datepicker("#dps-fullscreen", dash_dcc)
 
-    assert dash_dcc.get_logs() == []
-
 
 @pytest.mark.flaky(max_runs=3)
 def test_dppt004_datepicker_range_with_fullscreen_portal(dash_dcc):
@@ -355,8 +351,6 @@ def test_dppt004_datepicker_range_with_fullscreen_portal(dash_dcc):
     # Test clicking everything to verify all elements are accessible
     click_everything_in_datepicker("#dpr-fullscreen", dash_dcc)
 
-    assert dash_dcc.get_logs() == []
-
 
 def test_dppt005_portal_has_correct_classes(dash_dcc):
     """Test that portal datepickers have the correct CSS classes.

@@ -654,3 +654,83 @@ def update_output(value):
     assert len(logs) > 0
     warning_found = any("Too many marks" in log["message"] for log in logs)
     assert warning_found, "Expected warning about too many marks not found in logs"
+
+
+def test_slsl019_allow_direct_input_false(dash_dcc):
+    """Test that allow_direct_input=False hides input elements for both Slider and RangeSlider"""
+    app = Dash(__name__)
+    app.layout = html.Div(
+        [
+            html.Div(
+                [
+                    html.Label("Slider with allow_direct_input=False"),
+                    dcc.Slider(
+                        id="slider-no-input",
+                        min=0,
+                        max=100,
+                        step=5,
+                        value=50,
+                        allow_direct_input=False,
+                    ),
+                    html.Div(id="slider-output"),
+                ]
+            ),
+            html.Div(
+                [
+                    html.Label("RangeSlider with allow_direct_input=False"),
+                    dcc.RangeSlider(
+                        id="rangeslider-no-input",
+                        min=0,
+                        max=100,
+                        step=5,
+                        value=[25, 75],
+                        allow_direct_input=False,
+                    ),
+                    html.Div(id="rangeslider-output"),
+                ]
+            ),
+        ]
+    )
+
+    @app.callback(
+        Output("slider-output", "children"), [Input("slider-no-input", "value")]
+    )
+    def update_slider(value):
+        return f"Slider: {value}"
+
+    @app.callback(
+        Output("rangeslider-output", "children"),
+        [Input("rangeslider-no-input", "value")],
+    )
+    def update_rangeslider(value):
+        return f"RangeSlider: {value[0]}-{value[1]}"
+
+    dash_dcc.start_server(app)
+    dash_dcc.wait_for_text_to_equal("#slider-output", "Slider: 50")
+    dash_dcc.wait_for_text_to_equal("#rangeslider-output", "RangeSlider: 25-75")
+
+    # Verify no input elements exist for slider with allow_direct_input=False
+    slider_inputs = dash_dcc.find_elements("#slider-no-input .dash-range-slider-input")
+    assert (
+        len(slider_inputs) == 0
+    ), "Expected 0 inputs for slider with allow_direct_input=False"
+
+    # Verify no input elements exist for rangeslider with allow_direct_input=False
+    rangeslider_inputs = dash_dcc.find_elements(
+        "#rangeslider-no-input .dash-range-slider-input"
+    )
+    assert (
+        len(rangeslider_inputs) == 0
+    ), "Expected 0 inputs for rangeslider with allow_direct_input=False"
+
+    # Verify sliders are still functional by clicking them
+    slider = dash_dcc.find_element("#slider-no-input")
+    dash_dcc.click_at_coord_fractions(slider, 0.75, 0.5)
+    dash_dcc.wait_for_text_to_equal("#slider-output", "Slider: 75")
+
+    rangeslider = dash_dcc.find_element("#rangeslider-no-input")
+    # Click closer to the left to move the lower handle
+    dash_dcc.click_at_coord_fractions(rangeslider, 0.1, 0.5)
+    dash_dcc.wait_for_text_to_equal("#rangeslider-output", "RangeSlider: 10-75")
+
+    assert dash_dcc.get_logs() == []