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feat(HoldButton): Add button that must be held for destructive actions
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Lines changed: 255 additions & 8 deletions

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‎docs/src/ui/hold-button.stories.tsx‎

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import type { Meta, StoryObj } from "@storybook/react-vite"
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import { HoldButton, type HoldButtonProps } from "boring-blocks"
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import { Fragment } from "react/jsx-runtime"
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import { argType } from "../utils/arg-type"
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const titleSides = [
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"top",
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"bottom",
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"left",
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"right",
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] satisfies HoldButtonProps["titleSide"][]
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const kinds = [
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"key",
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"ghost",
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"flat",
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"destructive",
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] satisfies HoldButtonProps["look"][]
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const captions = {
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idle: "Idle",
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holding: "Holding",
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triggered: "Triggered",
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}
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const meta = {
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title: "Buttons/HoldButton",
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component: HoldButton,
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argTypes: {
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ref: argType.disabled(),
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captions: argType.disabled(),
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disabled: argType.boolean(),
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title: argType.string(),
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titleSide: argType.enum("select", titleSides),
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active: argType.boolean(),
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look: argType.enum("select", kinds),
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size: argType.enum("radio", ["md", "sm"]),
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icon: argType.props.icon,
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iconColor: argType.props.iconColor,
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holdDuration: argType.number(),
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onPointerDown: argType.callback(),
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onPointerUp: argType.callback(),
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onPointerEnter: argType.callback(),
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onPointerLeave: argType.callback(),
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onClick: argType.callback(),
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onBlur: argType.callback(),
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onFocus: argType.callback(),
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},
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args: {
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holdDuration: 1500,
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captions,
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look: "flat",
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size: "md",
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active: false,
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disabled: false,
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icon: argType.props.icon.default,
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iconColor: "current",
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},
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render: args => <HoldButton key={args.titleSide} {...args} />,
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} satisfies Meta<typeof HoldButton>
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export default meta
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type Story = StoryObj<typeof meta>
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export const Default: Story = {
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name: "HoldButton",
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render: args => (
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<div className="inline-grid grid-cols-[auto_auto_auto_auto] items-center gap-1">
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{kinds.map(look => (
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<Fragment key={look}>
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<span className="mr-2 text-text-gentle">{look}:</span>
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<HoldButton {...args} look={look} />
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<HoldButton {...args} look={look} active />
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<HoldButton {...args} look={look} disabled />
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</Fragment>
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))}
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</div>
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),
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}

‎src/components/primitive/button-primitive.tsx‎

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@@ -14,8 +14,10 @@ type AnchorHtmlProps = HTMLProps<HTMLAnchorElement>
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type SharedKeys =
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| "ref"
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| "aria-current"
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| "onMouseDown"
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| "onMouseUp"
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| "onPointerDown"
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| "onPointerUp"
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| "onPointerLeave"
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| "onPointerEnter"
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| "onFocus"
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| "onBlur"
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‎src/components/ui/hold-button.tsx‎

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import { type PointerEvent, useRef, useState } from "react"
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import { cva } from "class-variance-authority"
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import { Button, type ButtonProps } from "./button"
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import { animate } from "../../utils/animate"
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import { cn } from "../../utils/cn"
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import { measureText } from "../../utils/measure-text"
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import { type ButtonPrimitiveProps } from "../primitive/button-primitive"
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const holdButton = cva("overflow-hidden", {
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variants: {
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look: {
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key: "active:bgl-layer-invert/15",
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ghost: "active:bgl-layer/10",
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flat: "active:bgl-layer/10",
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destructive: "active:bg-alert-error/15",
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},
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},
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})
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const holdButtonFill = cva(
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"absolute inset-0 z-0 block -translate-x-full [&~*,*:has(~&)]:z-1",
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{
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variants: {
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look: {
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key: "bg-max-invert/50",
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ghost: "bg-max-invert/15",
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flat: "bg-max-invert/15",
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destructive: "bg-alert-error/15",
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},
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},
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}
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)
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const states = animate.states({
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idle: { translate: "-100%" },
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hold: { translate: "0" },
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})
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const animateHold = (holdDuration: number) => {
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let anim: ReturnType<typeof animate> | null = null
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const start = (span: HTMLElement | null) => {
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if (!span) return
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anim = animate([
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[span, states.idle, {}],
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[span, states.hold, { duration: holdDuration }],
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[span, states.hold, { duration: holdDuration / 2 }],
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[span, states.idle, { duration: holdDuration / 2 }],
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])
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void anim.then(() => (anim = null))
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}
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const cancel = (span: HTMLElement | null) => {
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if (!anim || !span) return
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anim.cancel()
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const { translate } = window.getComputedStyle(span)
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void animate([
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[span, { translate }],
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[span, states.idle, { duration: 300 }],
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])
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}
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return { start, cancel }
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}
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type DefaultButtonProps = Omit<ButtonProps, keyof ButtonPrimitiveProps> &
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Omit<
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ButtonPrimitiveProps<"button">,
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"asChild" | "href" | "target" | "aria-current"
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>
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export type HoldButtonProps = Omit<
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DefaultButtonProps,
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"asChild" | "aria-current" | "look"
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> & {
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look?: Exclude<DefaultButtonProps["look"], "link">
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holdDuration?: number
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captions: {
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idle: string
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holding: string
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triggered: string
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}
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}
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export const HoldButton = ({
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holdDuration = 1500,
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onClick,
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onPointerDown,
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onPointerUp,
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className,
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look = "flat",
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captions,
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...props
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}: HoldButtonProps) => {
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const timeout = useRef<number>(undefined)
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const fillSpan = useRef<HTMLSpanElement>(null)
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const hold = useRef(animateHold(holdDuration))
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const [status, setStatus] = useState<"idle" | "holding" | "triggered">("idle")
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const start = (event: PointerEvent<HTMLButtonElement>) => {
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setStatus("holding")
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hold.current.start(fillSpan.current)
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window.clearTimeout(timeout.current)
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timeout.current = window.setTimeout(() => {
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setStatus("triggered")
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timeout.current = window.setTimeout(() => setStatus("idle"), holdDuration)
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onClick?.(event)
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}, holdDuration)
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}
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const stop = () => {
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if (status !== "holding") return
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setStatus("idle")
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window.clearTimeout(timeout.current)
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hold.current.cancel(fillSpan.current)
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}
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return (
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<Button
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{...props}
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onClick={() => null}
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className={cn(holdButton({ look }), className)}
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look={look}
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onPointerDown={event => {
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onPointerDown?.(event)
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start(event)
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}}
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onPointerUp={event => {
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onPointerUp?.(event)
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stop()
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}}
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onPointerLeave={event => {
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onPointerUp?.(event)
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stop()
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}}
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>
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<span ref={fillSpan} className={holdButtonFill({ look })} />
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<div
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ref={div => {
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if (!div) return
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const minWidth = Math.max(
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...Object.values(captions).map(text => measureText(text, div))
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)
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div.style.setProperty("min-width", minWidth + "px")
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}}
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>
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{captions[status]}
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</div>
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</Button>
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)
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}

‎src/index.ts‎

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@@ -7,6 +7,7 @@ export * from "./components/ui/context-info"
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export * from "./components/ui/date-input"
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export * from "./components/ui/dialog"
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export * from "./components/ui/divider"
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export * from "./components/ui/hold-button"
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export * from "./components/ui/file-input"
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export * from "./components/ui/icon"
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export * from "./components/ui/icon-button"

‎src/utils/cn.ts‎

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import {
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mergeConfigs,
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extendTailwindMerge,
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validators,
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type Config,
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twJoin,
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type ClassNameValue,
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} from "tailwind-merge"
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const getAny = () => [validators.isAny] as const
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const withBgl = <ClassGroupIds extends string, ThemeGroupIds extends string>(
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prevConfig: Config<ClassGroupIds, ThemeGroupIds>
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) =>
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mergeConfigs(prevConfig, {
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extend: {
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classGroups: {
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"bgl-base": [{ "bgl-base": getAny() }],
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"bgl-layer": [{ "bgl-layer": getAny() }],
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"bgl-base": [{ bgl: [(key: string) => key.startsWith("base")] }],
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"bgl-layer": [{ bgl: [(key: string) => key.startsWith("layer")] }],
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},
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conflictingClassGroups: {
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"bg-color": ["bgl-base", "bgl-layer", "bgl"],
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"bg-color": ["bgl-base", "bgl-layer"],
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},
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},
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})

‎src/utils/measure-text.ts‎

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export const measureText = (text: string, reference: HTMLElement) => {
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const element = document.createElement("span")
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element.style.font = window.getComputedStyle(reference).font
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element.style.display = "inline"
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element.style.position = "absolute"
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element.style.opacity = "0"
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element.style.whiteSpace = "nowrap"
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element.innerHTML = text
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document.body.appendChild(element)
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const width = element.offsetWidth
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document.body.removeChild(element)
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return width
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}

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