Left-to-right reading
The other demos keep the default rtl direction. With initialReadingDirection set to ltr, a spread starts on its left half, a page turn moves the reader to the right, and the last page of this sample, which has no page to face, keeps the half a spread starts on.
Not one utility of the reader changes with the direction. The navigation buttons are placed with the logical start-3 and end-3 rather than with left and right, the slider fill follows the direction through an rtl: variant on a custom property, and the page-turn icons are the one thing that reads the direction back out of the viewer context.
Source code
1"use client";23import * as ComicViewer from "@publira/comic-viewer";4import type { ViewerPage } from "@publira/comic-viewer";5import { ChevronLeft, ChevronRight } from "lucide-react";67const navigationButtonClassName =8 "pointer-events-auto absolute top-1/2 grid size-10 -translate-y-1/2 place-items-center rounded-full bg-black/60 p-0 text-slate-100 shadow-lg outline-offset-2 outline-slate-100 transition hover:bg-black/80 focus-visible:outline-2 disabled:cursor-not-allowed disabled:opacity-50";910/**11 * The page-turn buttons over the page. The logical `start-3` and `end-3` place12 * them on the sides the reading direction gives them, and the icons point the13 * way a page turn goes, which the viewer context reports.14 */15const PageNavigation = () => {16 const { readingDirection } = ComicViewer.useViewerContext();17 const PreviousIcon = readingDirection === "rtl" ? ChevronRight : ChevronLeft;18 const NextIcon = readingDirection === "rtl" ? ChevronLeft : ChevronRight;1920 return (21 <ComicViewer.PageNavigation className="pointer-events-none absolute inset-0 z-10 transition duration-150 ease-out aria-hidden:translate-y-2 aria-hidden:opacity-0">22 <ComicViewer.PreviousPageButton23 className={`start-3 ${navigationButtonClassName}`}24 >25 <PreviousIcon aria-hidden="true" className="size-6" />26 </ComicViewer.PreviousPageButton>27 <ComicViewer.NextPageButton28 className={`end-3 ${navigationButtonClassName}`}29 >30 <NextIcon aria-hidden="true" className="size-6" />31 </ComicViewer.NextPageButton>32 </ComicViewer.PageNavigation>33 );34};3536interface LeftToRightReaderProps {37 pages: readonly ViewerPage[];38}3940/**41 * A reader that turns pages to the right. Not one utility changes with the42 * direction: the navigation buttons are placed with the logical `start-3` and43 * `end-3`, and the slider fill follows the direction through an `rtl:` variant44 * on a custom property.45 */46export const LeftToRightReader = ({ pages }: LeftToRightReaderProps) => (47 <ComicViewer.Root48 className="relative flex h-full min-h-0 w-full min-w-0 overflow-hidden rounded-xl bg-slate-950 text-slate-100 shadow-2xl shadow-slate-950/30"49 initialReadingDirection="ltr"50 pages={pages}51 >52 {/* The track is three viewports wide and turns pages by translating itself.53 The page set, the slot, and the page each align the half of the spread they54 hold through the `data-page-side` attribute the rail reports. */}55 <ComicViewer.Viewport className="group/viewport relative flex min-h-0 min-w-0 flex-1 touch-pan-y overflow-hidden data-[pannable]:cursor-grab data-[pannable]:touch-none data-[panning]:cursor-grabbing">56 <ComicViewer.ViewportTrack className="flex h-full w-[300%] shrink-0 basis-[300%] [transform:translateX(calc(-33.3333%_+_var(--pcv-drag-offset)))] data-[dragging]:transition-none data-[transition-state=active]:transition-transform data-[transition-state=active]:duration-[260ms] data-[transition-state=active]:ease-out data-[transition-state=active]:data-[slide-direction=left]:[transform:translateX(calc(-66.6667%_+_var(--pcv-drag-offset)))] data-[transition-state=active]:data-[slide-direction=right]:[transform:translateX(var(--pcv-drag-offset))]">57 {/* The pan and the zoom of a pinch gesture apply to the spread on screen. */}58 <ComicViewer.ViewportPageSet className="flex h-full min-w-0 shrink-0 basis-1/3 data-[page-side=left]:justify-start data-[page-side=right]:justify-end data-[rail-slot=current]:[transform:translate(var(--pcv-pan-x,0)_var(--pcv-pan-y,0))_scale(var(--pcv-zoom-scale,1))]">59 {/* A page that is a whole spread on its own keeps both halves of the set,60 so the double-page basis it would otherwise take is given back to it. */}61 <ComicViewer.ViewportPageSlot className="flex min-w-0 flex-1 items-center justify-center data-[page-side=left]:justify-end data-[page-side=right]:justify-start data-[view-mode=double]:max-w-1/2 data-[view-mode=double]:basis-1/2 data-[view-mode=double]:data-[page-layout=spread]:max-w-full data-[view-mode=double]:data-[page-layout=spread]:basis-full">62 <ComicViewer.ViewportPage className="flex h-full w-full min-w-0 items-center justify-center data-[page-side=left]:justify-end data-[page-side=right]:justify-start">63 {/* The page fit mode the viewport reports is what sizes the image. */}64 <ComicViewer.PageCanvas className="h-full max-w-full bg-slate-900 object-contain transition-[filter] duration-150 group-data-[page-fit-mode=actual]/viewport:h-auto group-data-[page-fit-mode=actual]/viewport:w-auto group-data-[page-fit-mode=actual]/viewport:max-w-none group-data-[page-fit-mode=width]/viewport:h-auto group-data-[page-fit-mode=width]/viewport:w-full group-data-[page-fit-mode=width]/viewport:max-w-none data-[placeholder]:brightness-75 data-[placeholder]:saturate-75" />65 </ComicViewer.ViewportPage>66 </ComicViewer.ViewportPageSlot>67 </ComicViewer.ViewportPageSet>68 </ComicViewer.ViewportTrack>69 </ComicViewer.Viewport>70 {/* The toolbar slides out of sight with the `aria-hidden` the viewer sets71 on it while the reader controls are at rest. */}72 <ComicViewer.Toolbar className="absolute inset-x-0 bottom-0 z-10 flex items-center gap-2 bg-linear-to-t from-black/80 via-black/55 to-transparent px-3 pt-8 pb-3 transition duration-150 ease-out aria-hidden:translate-y-2 aria-hidden:opacity-0">73 {/* The slider reports the share of the document its thumb rests at as74 `--pcv-page-progress-fill`, which paints the part of the track behind it,75 and the fill runs the way the reader turns pages. */}76 <ComicViewer.PageProgress className="mx-auto min-w-0 shrink basis-3/5">77 <ComicViewer.PageProgressSlider className="block h-3.5 w-full cursor-pointer appearance-none bg-transparent p-0 outline-offset-4 outline-slate-100 [--pcv-page-progress-fill-direction:to_right] focus-visible:outline-2 disabled:cursor-not-allowed disabled:opacity-50 rtl:[--pcv-page-progress-fill-direction:to_left] [&::-moz-range-thumb]:size-3.5 [&::-moz-range-thumb]:rounded-full [&::-moz-range-thumb]:border-0 [&::-moz-range-thumb]:bg-slate-100 [&::-moz-range-track]:h-1 [&::-moz-range-track]:rounded-full [&::-moz-range-track]:bg-black/65 [&::-moz-range-track]:[background-image:linear-gradient(var(--pcv-page-progress-fill-direction),var(--color-slate-100)_var(--pcv-page-progress-fill),transparent_var(--pcv-page-progress-fill))] [&::-webkit-slider-runnable-track]:h-1 [&::-webkit-slider-runnable-track]:rounded-full [&::-webkit-slider-runnable-track]:bg-black/65 [&::-webkit-slider-runnable-track]:[background-image:linear-gradient(var(--pcv-page-progress-fill-direction),var(--color-slate-100)_var(--pcv-page-progress-fill),transparent_var(--pcv-page-progress-fill))] [&::-webkit-slider-thumb]:-mt-[0.3125rem] [&::-webkit-slider-thumb]:size-3.5 [&::-webkit-slider-thumb]:appearance-none [&::-webkit-slider-thumb]:rounded-full [&::-webkit-slider-thumb]:border-0 [&::-webkit-slider-thumb]:bg-slate-100" />78 <ComicViewer.PageStatus className="mt-1.5 block text-center text-sm text-slate-100" />79 </ComicViewer.PageProgress>80 </ComicViewer.Toolbar>81 <PageNavigation />82 </ComicViewer.Root>83);