c2n/web-componentsv1.0.18
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OverviewGetting startedComponentsIconsGuidesExamples
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Float Button

A floating action button for the main action of a screen, which can expand into a speed dial of related actions.

c2-float-button

A raised button pinned to a corner of the viewport for the screen's main action ("Compose", "New task"). Give it c2-float-button-action children and it becomes a speed dial: the button opens a short menu of related actions that fan out in direction, its plus turning into a cross.

Without actions it is a plain button and fires the native click. With actions the button follows the menu-button pattern: Enter, Space or an arrow key opens the dial and focuses the first action, the arrow keys move between actions, Escape closes it and returns focus, and Tab or a click outside closes it.

The button is position: fixed 24px from the bottom-right corner by default; set --c2-float-button--position and --c2-float-button--inset to place it elsewhere or in the flow. Show its label next to the icon (an "extended" button) with --c2-float-button__label--display: inline.

Attributes

NameTypeDefaultDescription
labelstring—Accessible name of the button and its speed dial, also the visible text of an extended button. Defaults to "Actions".
openbooleanfalseWhether the speed dial is expanded. Has no effect without actions.
directionFloatButtonDirectionupWhere the actions fan out from the button.
triggerFloatButtonTriggerclickhover also opens the dial while a mouse pointer is over it; a click or the keyboard still toggle it.
disabledbooleanfalseDisables the button and closes the dial.

Slots

NameDescription
(default)The speed dial's c2-float-button-action elements, nearest the button first.
iconThe button's icon. Defaults to a plus that turns into a cross while the dial is open.
open-iconReplaces the icon while the dial is open.

Events

NameTypeDescription
action-selectCustomEvent<FloatButtonSelectEventDetail>An action was activated by a click, Enter or Space: detail.value and detail.action. Cancelable: preventDefault() keeps the dial open.
toggleToggleEventThe speed dial opened or closed; newState is open or closed.

CSS parts

Shadow DOM styling hooks used with ::part(name). Prefer CSS custom properties when they cover the change.

NameDescription
buttonThe native button.
labelThe visible label of an extended button.
actionsThe speed dial's menu container.

CSS custom properties

Grouped by semantic target and state from --c2-<component>__<target>__<state>--<property>. Click a group to collapse it; click a name to copy it.

NameTypeDefaultDescription
c2-float-button
--c2-float-button--positionpositionfixedabsolute to pin the button inside a positioned container, static to keep it in the flow.
--c2-float-button--insetinsetauto 24px 24px autoDistance from the edges of the viewport (or container); top right bottom left.
--c2-float-button--z-indexnumber100
c2-float-button > button
--c2-float-button__button--sizepixel56pxHeight, and minimum width, of the button.
--c2-float-button__button--padding-inlinepadding16pxSide padding; with the 24px icon it makes a 56px circle.
--c2-float-button__button--gappixel8pxSpace between the icon and the visible label.
--c2-float-button__button--border-radiusborder-radius999px
--c2-float-button__button--borderbordernone
--c2-float-button__button--background-colorcolorrgb(2, 101, 220)
--c2-float-button__button--colorcolor#ffffffIcon and label colour.
--c2-float-button__button--box-shadowshadow0 6px 16px rgba(24, 24, 27, 0.2), 0 2px 4px rgba(24, 24, 27, 0.12)
c2-float-button > button > hover
--c2-float-button__button__hover--background-colorcolor#0154b8
--c2-float-button__button__hover--box-shadowshadow0 10px 24px rgba(24, 24, 27, 0.24), 0 3px 6px rgba(24, 24, 27, 0.14)
c2-float-button > button > open
--c2-float-button__button__open--background-colorcolor#0154b8
c2-float-button > focus
--c2-float-button__focus--outlineoutline2px solid rgba(2, 101, 220, 0.4)
--c2-float-button__focus--outline-offsetpixel3px
c2-float-button > disabled
--c2-float-button__disabled--opacityopacity0.38
c2-float-button > icon
--c2-float-button__icon--sizepixel24px
c2-float-button > icon > open
--c2-float-button__icon__open--transformtransformrotate(45deg)The icon's turn while open; none to keep it still.
c2-float-button > label
--c2-float-button__label--displaydisplaynoneinline shows label next to the icon (an extended button).
--c2-float-button__label--font-sizefont-size14px
--c2-float-button__label--font-weightfont-weight600
c2-float-button > actions
--c2-float-button__actions--gappixel12pxSpace between actions.
--c2-float-button__actions--offsetpixel16pxSpace between the button and the nearest action.
--c2-float-button__actions--transition-durationtime200ms
--c2-float-button__actions--staggertime30msDelay added per action as the dial opens.

Text and languages

The text the component shows, in English. It shows another language when the app adds one with addTranslations, under float-button, and the nearest lang asks for it; any message not translated stays in English. {0}, {1}… stand for the values a message carries. Languages guide.

KeyEnglishValues
actionsActions—

c2-float-button-action

One action of a c2-float-button speed dial: a small round button with a label chip beside it. The host is the menu item (role="menuitem" through ElementInternals); the owning c2-float-button assigns the roving tabindex, places the chip on the side that suits its direction and fires action-select when it is activated.

Attributes

NameTypeDefaultDescription
labelstring—Accessible name of the action, also shown in the label chip.
valuestring—Reported as detail.value of the owner's action-select event.
disabledbooleanfalseA disabled action is skipped by the arrow keys and never fires action-select.

Slots

NameDescription
(default)The icon (an inline <svg>, a c2-feather-* or a c2-mat-icon element).

CSS parts

Shadow DOM styling hooks used with ::part(name). Prefer CSS custom properties when they cover the change.

NameDescription
buttonThe round button.
labelThe label chip beside the button.

CSS custom properties

Grouped by semantic target and state from --c2-<component>__<target>__<state>--<property>. Click a group to collapse it; click a name to copy it.

NameTypeDefaultDescription
c2-float-button-action
c2-float-button-action > button
--c2-float-button-action__button--sizepixel40pxDiameter of the button.
--c2-float-button-action__button--border-radiusborder-radius999px
--c2-float-button-action__button--background-colorcolor#ffffff
--c2-float-button-action__button--colorcolor#18181bIcon colour.
--c2-float-button-action__button--borderborder1px solid #e4e4e7
--c2-float-button-action__button--box-shadowshadow0 2px 6px rgba(24, 24, 27, 0.16)
c2-float-button-action > button > hover
--c2-float-button-action__button__hover--background-colorcolor#f4f4f5
c2-float-button-action > focus
--c2-float-button-action__focus--outlineoutline2px solid rgba(2, 101, 220, 0.4)
--c2-float-button-action__focus--outline-offsetpixel2px
c2-float-button-action > disabled
--c2-float-button-action__disabled--opacityopacity0.38
c2-float-button-action > icon
--c2-float-button-action__icon--sizepixel20px
c2-float-button-action > label
--c2-float-button-action__label--displaydisplayblocknone for icon-only actions.
--c2-float-button-action__label--background-colorcolor#ffffff
--c2-float-button-action__label--colorcolor#18181b
--c2-float-button-action__label--borderborder1px solid #e4e4e7
--c2-float-button-action__label--font-sizefont-size12px
--c2-float-button-action__label--font-weightfont-weight500
--c2-float-button-action__label--paddingpadding4px 10px
--c2-float-button-action__label--border-radiusborder-radius6px
--c2-float-button-action__label--box-shadowshadow0 2px 6px rgba(24, 24, 27, 0.12)
--c2-float-button-action__label--insetinset—Where the chip sits around the button. Defaults to the inline start for a vertical dial and above it for a horizontal one; set 50% auto auto calc(100% + 12px) to put it on the right.
--c2-float-button-action__label--transformtransform—Centres the chip on the button's axis; pair it with --c2-float-button-action__label--inset (translateY(-50%) beside, translateX(-50%) above).
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