README.en.md

@file-viewer/react

The standard React native component package for Flyfish File Viewer. The component renders a React container and mounts the complete viewer through this package's local controller on top of @file-viewer/core and the core browser engine. It keeps ref APIs, controlled props, lifecycle events, and the full options surface.

npm install @file-viewer/react

import FileViewer from '@file-viewer/react'

export function Preview() {
  return (
    <div style={{ height: '100vh' }}>
      <FileViewer
        url="/example/demo.docx"
        options={{
          theme: 'light',
          toolbar: { position: 'bottom-right' }
        }}
      />
    </div>
  )
}

The historical package @flyfish-group/file-viewer-react remains supported for compatibility. New integrations should prefer the self-contained standard package @file-viewer/react.

Capabilities

@file-viewer/react shares the same core contract and renderer/preset assembly model with the other standard component packages; full capability can be assembled with on-demand renderers or @file-viewer/preset-all, including PDF, Word, Excel, PowerPoint, OFD, CAD/DWG/DXF/DWF, EPUB/UMD, archives, email, Markdown, highlighted code, images, audio, video, 3D models, geospatial files, and structured data assets. See the complete format matrix and option reference at https://doc.file-viewer.app/guide/formats

Ecosystem Matrix

Every standard component package shares @file-viewer/core as the only common foundation, and no framework component package depends on another framework implementation. Core owns format metadata, source loading, the renderer protocol, events, operation APIs, search, zoom, print, export, and the framework-neutral browser shell. Heavy PDF, Word, PPT/PPTX, CAD, Typst, and similar pipelines are assembled explicitly through renderer packages or presets; each framework package owns its component lifecycle, type exports, compatibility defaults, and ecosystem-specific interaction layer.

Framework	Standard npm package	Entrypoints	GitHub	Gitee	Historical aliases
Vanilla JS / Pure Web	@file-viewer/web	ESM, type declarations, script tag IIFE, worker/WASM viewer assets, asset copy CLI	file-viewer-web	file-viewer-web	@flyfish-group/file-viewer-web
Vanilla JS / Pure Web Full	@file-viewer/web-full	ESM, type declarations, script tag IIFE	file-viewer-web-full	file-viewer-web-full	none
Vue 3	@file-viewer/vue3	ESM, type declarations	file-viewer-vue3	file-viewer-vue3	@flyfish-group/file-viewer3, file-viewer3
Vue 3 Full	@file-viewer/vue3-full	ESM, type declarations	file-viewer-vue3-full	file-viewer-vue3-full	none
Vue 2.7	@file-viewer/vue2.7	ESM, type declarations	file-viewer-vue2.7	file-viewer-vue2.7	@flyfish-group/file-viewer
Vue 2.7 Full	@file-viewer/vue2.7-full	ESM, type declarations	file-viewer-vue2.7-full	file-viewer-vue2.7-full	none
Vue 2.6	@file-viewer/vue2.6	ESM, type declarations	file-viewer-vue2.6	file-viewer-vue2.6	none
Vue 2.6 Full	@file-viewer/vue2.6-full	ESM, type declarations	file-viewer-vue2.6-full	file-viewer-vue2.6-full	none
React 18/19	@file-viewer/react	ESM, type declarations	file-viewer-react	file-viewer-react	@flyfish-group/file-viewer-react
React 18/19 Full	@file-viewer/react-full	ESM, type declarations	file-viewer-react-full	file-viewer-react-full	none
React 16.8/17	@file-viewer/react-legacy	ESM, type declarations	file-viewer-react-legacy	file-viewer-react-legacy	none
React 16.8/17 Full	@file-viewer/react-legacy-full	ESM, type declarations	file-viewer-react-legacy-full	file-viewer-react-legacy-full	none
jQuery	@file-viewer/jquery	ESM, type declarations	file-viewer-jquery	file-viewer-jquery	none
jQuery Full	@file-viewer/jquery-full	ESM, type declarations	file-viewer-jquery-full	file-viewer-jquery-full	none
Svelte	@file-viewer/svelte	Svelte component, ESM, type declarations	file-viewer-svelte	file-viewer-svelte	none
Svelte Full	@file-viewer/svelte-full	Svelte component, ESM, type declarations	file-viewer-svelte-full	file-viewer-svelte-full	none

Format Support Matrix

The shared catalog registers 221 file extensions (221 stable and 0 experimental) across 32 preview pipelines. Experimental formats do not count toward stable support; full capability is assembled through renderer packages or presets.

Preview pipeline	Category	Extensions	Level / status	Capabilities	Loading
Word OpenXML	office	.docx, .docm, .dotx, .dotm	high-fidelity / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
Word Binary	office	.doc, .dot	structured / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
PowerPoint 97–2003	office	.ppt, .pot	structured / stable	download, print(adapter), HTML export(adapter), zoom(provider)	lazy async
PowerPoint OpenXML	office	.pptx, .pptm, .potx, .potm, .ppsx, .ppsm	high-fidelity / stable	download, print, HTML export, zoom(provider), search	lazy async
Open Document	office	.rtf, .odt, .odp	structured / stable	download, print, HTML export, zoom(provider), search	lazy async
Spreadsheet	office	.xlsx, .xltx, .xlsm, .xlsb, .xls, .xlt, .xla, .xlam, .xltm, .csv, .tsv, .ods, .fods	structured / stable	download, zoom(provider), search	lazy async
Apple Pages	office	.pages	high-fidelity / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
Apple Numbers	office	.numbers	high-fidelity / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
Apple Keynote	office	.key	high-fidelity / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
WordPerfect	office	.wpd, .wp, .wp5, .wp6	structured / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
dBASE Table	office	.dbf	structured / stable	download, zoom(provider), search	lazy async
PDF	document	.pdf	high-fidelity / stable	download, print(adapter), HTML export(adapter), zoom(provider), search(provider)	lazy async
OFD	document	.ofd	structured / stable	download, print, HTML export, zoom(provider), search	lazy async
Hancom Hangul	office	.hwp, .hwpx	structured / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
Typst	document	.typ, .typst	high-fidelity / stable	download, print(adapter), HTML export(adapter), zoom(provider), search	lazy async
Archive	archive	.zip, .zipx, .7z, .rar, .tar, .gz, .gzip, .tgz, .bz2, .bzip2, .tbz, .tbz2, .xz, .txz, .lzma, .zst, .tzst, .cab, .ar, .cpio, .iso, .xar, .lha, .lzh, .jar, .war, .ear, .apk, .cbz, .cbr	structured / stable	download, search	lazy async
Email	email	.eml, .msg, .mbox	structured / stable	download, HTML export, search	lazy async
EDA	eda	.olb, .dra, .gds, .oas, .oasis	structured / stable	download, print, HTML export, search	lazy async
CAD	cad	.dxf, .dwg, .dwf, .dwfx, .xps	high-fidelity / stable	download, print, HTML export, zoom(provider)	lazy async
3D Model	model	.glb, .gltf, .obj, .stl, .ply, .fbx, .dae, .3ds, .3mf, .amf, .usd, .usda, .usdc, .usdz, .kmz, .step, .stp, .iges, .igs, .ifc, .3dm, .brep, .pcd, .wrl, .vrml, .xyz, .vtk, .vtp	structured / stable	download, zoom(provider)	lazy async
Geospatial	geo	.geojson, .kml, .gpx, .shp	structured / stable	download, print, HTML export, zoom(provider), search	lazy async
Drawing	drawing	.excalidraw, .drawio, .dio, .mermaid, .mmd, .plantuml, .puml	structured / stable	download, print, HTML export, zoom(provider), search	lazy async
Mind Map	mindmap	.xmind	structured / stable	download, print, HTML export, zoom(provider), search	lazy async
EPUB	ebook	.epub	high-fidelity / stable	download, HTML export, search(provider)	lazy async
FictionBook	ebook	.fb2	structured / stable	download, print, HTML export, search	lazy async
UMD	ebook	.umd	structured / stable	download, print, HTML export, zoom(provider), search	lazy async
Image	image	.gif, .jpg, .jpeg, .bmp, .tiff, .tif, .png, .svg, .webp, .avif, .ico, .heic, .heif, .jxl	high-fidelity / stable	download, print, HTML export, zoom(provider)	lazy async
Markdown	markdown	.md, .markdown	structured / stable	download, print, HTML export, search	lazy async
Code and Text	code	.txt, .json, .js, .mjs, .cjs, .css, .java, .py, .html, .htm, .jsx, .ts, .tsx, .xml, .log, .vue, .yaml, .yml, .ini, .sh, .bash, .sql, .go, .rs, .php, .c, .cpp, .cc, .h, .hpp, .cs, .diff, .patch, .bundle, .bdl, .jsonc, .json5, .ipynb, .toml, .proto, .hcl, .tex, .gv, .http, .react, .rb, .swift, .kt	structured / stable	download, print, HTML export, search	lazy async
Video	media	.mp4, .webm, .m3u8	high-fidelity / stable	download	lazy async
Audio	media	.mp3, .mpeg, .wav, .ogg, .oga, .opus, .m4a, .aac, .flac, .weba, .midi, .mid	high-fidelity / stable	download	lazy async
Data Asset	asset	.ttf, .otf, .woff, .woff2, .psd, .ai, .eps, .sqlite, .wasm, .parquet, .avro, .webarchive	structured / stable	download, HTML export, search	lazy async

Engineering-Grade On-Demand Renderer Assembly

The quickstart flow is: get the component running first, then make the format boundary explicit. Install the component package for the current ecosystem, then choose @file-viewer/preset-lite, @file-viewer/preset-office, @file-viewer/preset-engineering, or @file-viewer/preset-all. For Webpack, Rspack, Rollup, Umi, classic multi-page apps, and other non-Vite stacks, pass capability explicitly through options.preset or options.renderers. The Vite plugin is an optional convenience layer that removes manual imports and copies offline assets.

npm i @file-viewer/react @file-viewer/preset-office

import officePreset from '@file-viewer/preset-office'

const options = {
  preset: officePreset,
  rendererMode: 'replace'
}

When a product combines Office documents with engineering drawings, keep the same preset field and pass an array:

import officePreset from '@file-viewer/preset-office'
import engineeringPreset from '@file-viewer/preset-engineering'

const options = {
  preset: [officePreset, engineeringPreset],
  rendererMode: 'replace'
}

For exact small cuts, install one renderer and pass it through options.renderers:

import { pdfRenderer } from '@file-viewer/renderer-pdf'

const options = {
  renderers: [pdfRenderer],
  rendererMode: 'replace'
}

Vite projects can add the plugin. It auto-discovers installed presets, injects the virtual module, and copies matching Worker / WASM / font / vendor assets:

npm i -D @file-viewer/vite-plugin

import { fileViewerRenderers } from '@file-viewer/vite-plugin'

export default {
  plugins: [
    fileViewerRenderers({
      copyAssets: true
      // No preset option required: the plugin discovers installed @file-viewer/preset-office.
    })
  ]
}

Heavy users that want the complete official demo capability can switch to the full preset. Non-Vite projects keep options.preset; the Vite config stays the same:

npm i @file-viewer/react @file-viewer/preset-all

Use explicit plugin options only when you need customization:

fileViewerRenderers({
  preset: 'auto',        // keep installed preset auto-discovery while scanning source hints
  scan: true,            // detects fileViewerFormats, data-file-viewer-formats, and accept
  formats: ['pdf'],      // adds exact renderers outside the installed preset
  copyAssets: true,
  chunkStrategy: 'renderer'
})

For strict custom cuts or component-library tests, disable injection and pass the virtual module explicitly:

// vite.config.ts
fileViewerRenderers({ formats: ['pdf'], inject: false, copyAssets: true })

// Application viewer entry
import { configuredFileViewerRenderers } from 'virtual:file-viewer-renderers'

const options = {
  renderers: configuredFileViewerRenderers,
  rendererMode: 'replace'
}

• Vue, React, Svelte, jQuery, and Vanilla JavaScript / Pure Web all receive the same options; each package maps them to native props, hooks, actions, plugins, or mountViewer(...) parameters.
• preset-lite covers text, Markdown, code, images, audio, and video; preset-office covers PDF / Word / Excel / PowerPoint / OFD; preset-engineering covers CAD / 3D / drawing / XMind / Geo / Typst / EDA / Data.
• For the smallest custom bundle, skip presets, install individual renderers such as @file-viewer/renderer-pdf or @file-viewer/renderer-word, and pass them through options.renderers.
• fileViewerRenderers() or fileViewerRenderers({ copyAssets:true }) auto-discovers installed presets without explicit configuration. When scan:true is also enabled, use preset:'auto' or autoPresets:true to keep preset auto-discovery.
• scan:true detects fileViewerFormats, data-file-viewer-formats, and upload accept hints so development and production builds select matching renderers automatically.
• copyAssets:true copies PDF/CAD/Typst/Archive/Data workers, WASM, and vendor assets for offline and enterprise intranet deployment; archive directories use vendor/libarchive/worker-bundle.js / libarchive.wasm first, while the compatibility path only covers ZIP/TAR/GZIP when the Worker cannot start.
• builtinRenderers remains available for advanced baseline control or historical compatibility. Normal quick starts only need preset / renderers plus rendererMode.
• If a file is in the supported matrix but its renderer is not assembled, the viewer shows the recommended preset / renderer package. Truly unknown extensions still show an unsupported-format state.
• @file-viewer/preset-all provides the complete renderer matrix; Worker, WASM, font, and vendor assets still need to be deployed by the Vite plugin or file-viewer-copy-assets. *-full packages already include this preset and must not install it again.

Shared Options And Events

Every ecosystem package uses the same ViewerMountOptions and FileViewerOptions semantics, mapped to framework-native props, events, refs, actions, or plugin APIs.

Option	Description
url	Remote file URL from object storage, business APIs, or intranet file services.
file	File, Blob, or ArrayBuffer for uploads, local selection, or already-fetched binary data.
buffer	Direct ArrayBuffer input after custom download, authorization, or decryption.
name / filename	Display name and extension hint. Pass it explicitly when the URL has no useful extension.
type	Explicit extension or MIME hint that overrides automatic detection.
size	File size hint used in lifecycle context, loading states, and safety limits.
options	The shared FileViewerOptions surface. Every component package keeps the same semantics.
options.styleIsolation	auto, shadow, scoped, or none. auto uses Shadow DOM for every standard component so host-page global CSS cannot break the toolbar or document; legacy projects can explicitly use none.
onEvent / onStateChange	Unified event and state subscriptions for imperative wrappers such as Vanilla JavaScript / Pure Web, React, and Svelte. Vue maps the same events to native emits.

Actual Component Props

The table below lists the real props, event channel, and customization entry for every standard package. If you need imperative mount fields such as buffer, name, type, or size, prefer Vanilla JavaScript / Pure Web, React, Svelte, jQuery, or Vue 2. The Vue 3 declarative component intentionally keeps the compact url / file / options entry; wrap raw binary input as a named File when extension detection matters.

Component	Actual props / entry	Event channel	Customization entry
Vanilla JS / Pure Web @file-viewer/web	<flyfish-file-viewer> attributes: src/url, filename/name, type, size, theme, toolbar, toolbar-position, watermark, search, options; also supports mountViewer(...)	viewer-ready, viewer-event, viewer-state-change, viewer-error, onEvent, onStateChange, controller.subscribe()	The Custom Element instance exposes the full controller handle; the IIFE script auto-registers it while keeping imperative mountViewer and the asset copy CLI.
Vue 3 @file-viewer/vue3	url, file, options	load-start, load-complete, unload-start, unload-complete, operation-before, operation-cancel, operation-availability-change, search-change, location-change, zoom-change, view-state-change, theme-change	Template refs expose FileViewerExpose. For Blob / ArrayBuffer, prefer wrapping it as a named File so extension detection stays deterministic.
Vue 2.7 @file-viewer/vue2.7	url, file, buffer, name, filename, type, size, options, containerClass, containerStyle	viewer-event / viewerEvent	The component instance exposes the full controller handle. This is the Vue 2.7 line behind the historical @flyfish-group/file-viewer package.
Vue 2.6 @file-viewer/vue2.6	Same as Vue 2.7	viewer-event / viewerEvent	Separate Vue 2.6 build for long-lived applications that cannot move to Vue 2.7.
React @file-viewer/react	ViewerMountOptions plus native div props such as className, style, data-*, and aria-*	onEvent, onStateChange	ref exposes FileViewerHandle; useFileViewer() returns ref, props, state, and handle for custom toolbars.
React Legacy @file-viewer/react-legacy	Same as the React package	onEvent, onStateChange	Targets React 16.8 / 17 with a legacy-friendly component export.
jQuery @file-viewer/jquery	$(el).fileViewer(ViewerMountOptions & { replace?: boolean })	onEvent, onStateChange, or getFileViewerController(el).subscribe()	Plugin methods include zoomIn, printRenderedHtml, and searchDocument; replace:false updates the same node in place.
Svelte @file-viewer/svelte	ViewerMountOptions plus className and containerStyle	on:viewerEvent, onEvent, onStateChange	bind:this exposes the controller handle; the use:fileViewer action is also available and adds replace.

Options Field	Description
theme	light, dark, or system. This takes precedence over browser prefers-color-scheme.
styleIsolation	auto, shadow, scoped, or none. With auto, Web Component, IIFE, Vue, React, Svelte, jQuery, and full packages all use Shadow DOM by default. Legacy integrations that depend on deep class overrides can explicitly use none.
watermark	Text or image watermark with opacity, rotation, gap, size, font, and color controls.
toolbar	Controls the theme toggle, download, print, HTML export, zoom, item order, toolbar position, and operation-level preflight checks.
search	Document search, highlight class names, case sensitivity, whole-word matching, max matches, and debounce.
ai	Text collection, chunk size, and max text length for provenance, location, vectorization, and external AI workflows.
archive	Archive Worker/WASM URLs, timeout, cache, archive limits, nested entry preview limits, and legacy GBK/GB18030 ZIP filename decoding.
pdf	PDF.js worker, navigation pane, outline, thumbnails, rotation, streaming, range chunk size, and credentials.
docx / spreadsheet	DOCX is provided by @file-viewer/renderer-word and uses the self-maintained @file-viewer/docx engine with automatic worker/main-thread selection, continuous flow reading, and async rendering by default; visual pagination is opt-in. Spreadsheet is provided by @file-viewer/renderer-spreadsheet with fidelity-first parsing, automatic Worker use for large files, and opt-in header drag column resizing.
iwork	Pages / Numbers / Keynote module Worker, timeout, ZIP/Snappy/IWA safety limits, and explicit Quick Look fallback policy. The three Apple formats are stable for static high-fidelity preview after structural, browser, and visual-golden gates across iWork ’09, 2013+, and current fixtures.
hangul	HWP/HWPX module Worker, timeout, ZIP inflation/compression/entry limits, and HWP record limits. Stable support is a real-fixture-verified static structured preview.
wordPerfect	WordPerfect Worker, bundled libwpd/librevenge WASM URL, and timeout. It falls back to bounded text only when WASM fails; the normal structured path is verified with redistributable real fixtures.
presentation	The presentation renderer keeps two isolated engines: binary PowerPoint 97–2003 .ppt uses the packaged @file-viewer/ppt@0.3.3 Worker/OffscreenCanvas/WASM runtime with zero-config standard asset routes; pptModuleUrl / pptWorkerUrl / pptWasmUrl / pptFontUrl are custom-path overrides, while pptWorker and pptCache control its Worker and bounded frame cache. PPTX/OpenXML uses the @file-viewer/pptx Worker with optional workerUrl / workerType overrides.
typst / data / cad	Typst, SQLite, CAD/DWG/DXF/DWF WASM, worker, encoding, and rendering strategy options.
hooks / beforeOperation	Shared lifecycle hooks and operation preflight checks for audit, permission, telemetry, and safety controls.

Style Isolation And Theme Customization

Every standard component uses strong Shadow DOM isolation by default. Host-page global rules for *, button, table, img, svg, canvas, and similar selectors should not leak into the viewer toolbar or rendered content, and viewer resets should not pollute the host page.

Mode	Description
auto	Default. Web Component, IIFE, Vue, React, Svelte, jQuery, and full packages all use Shadow DOM so host-page CSS cannot break the toolbar or renderer content.
shadow	Creates an explicit ShadowRoot render surface. Use it when host CSS is uncontrolled, micro-frontends are mixed, low-code platforms inject global resets, or design systems have aggressive base styles.
scoped	Does not create a ShadowRoot. Uses a stable root selector and local resets to limit its impact while keeping controlled inheritance from the host.
none	Historical light-DOM behavior for projects that depend on deep class overrides, old theme CSS, or snapshot tests.

styleIsolation is a mount-time boundary. Remount the component when changing modes. Both scoped and none use Light DOM, so high-specificity or !important host rules can still override them.

Customization should start with --file-viewer-* CSS variables for color, typography, spacing, radius, toolbar, and button styling. Use stable Shadow Parts only when a specific internal surface needs styling. The current Web shell exposes host, shell, toolbar, toolbar-group, toolbar-status, button, input, and content; renderer extensions should keep using stable names such as state-panel and watermark. Do not depend on internal class names; they are implementation details.

In this example, file-viewer-host is the class on the actual Shadow host. Pass it as class in Vue 3, containerClass in Vue 2, className in React / Svelte, or add it to the element initialized by jQuery.

.file-viewer-host {
  --file-viewer-bg: #f7f9fc;
  --file-viewer-text: #172033;
  --file-viewer-toolbar-bg: rgba(255, 255, 255, 0.96);
  --file-viewer-button-color: #154b83;
  --file-viewer-button-radius: 6px;
}

.file-viewer-host::part(toolbar) {
  border: 1px solid rgba(20, 60, 100, 0.14);
}

.file-viewer-host::part(button) {
  font-weight: 600;
}

Framework packages use Shadow DOM without extra configuration; set it explicitly when you want to lock the policy:

const options = {
  styleIsolation: 'shadow',
  theme: 'light',
  toolbar: { position: 'bottom-right' }
}

Toolbar Customization

Config	Description
toolbar: false	Hides the built-in toolbar without disabling controller APIs such as download, print, export, and zoom. Use this for a fully custom business toolbar.
toolbar: true	Uses the default built-in toolbar. The theme toggle is visible by default; download, print, HTML export, and zoom remain capability-aware.
download / print / exportHtml / zoom	Expresses whether the host allows a button. Final availability is still computed from file type, render readiness, export adapter, and zoom provider state.
theme	Controls the light/dark toggle and defaults to true. A change emits theme-change; set it to false to hide the button.
order	Orders built-in groups with search, zoom, download, print, exportHtml, and theme. Omitted items keep their default relative order.
position	auto, top, top-center, or bottom-right. The default auto floats PDF actions at bottom right and keeps other formats top-right; use top-center for a centered top toolbar.
beforeOperation	Toolbar-level preflight that runs after options.beforeOperation. Returning false or throwing cancels the operation.
beforeDownload / beforePrint / beforeExportHtml	Operation-specific preflight for download permission, print audit, export confirmation, and similar business rules.

For fully custom toolbars, hide the built-in toolbar and call the standard ref / controller APIs from your own UI. Do not implement zoom with an outer CSS transform: scale(); PDF, Excel, CAD, canvas-based, and text-layer renderers should use their internal zoom providers to keep coordinates correct.

Zoom state is reported by each renderer provider. After first-screen fit, container resize, or asynchronous PDF / Word / image layout, built-in toolbars show the real scale instead of assuming 100%. Custom toolbars should listen to zoom-change / operation-availability-change, or read getZoomState() / getOperationAvailability().

View-state sync is designed for projection systems, remote-control displays, side-by-side review, and reading-position restore. Every standard renderer loader gets a generic view-state provider that records at least renderer, zoom, and scroll position; PDF, XMind, Geo, 3D, and CAD add page, navigation, canvas pan, map center, camera, or native view snapshots. Pass options.initialViewState for first render, listen to view-state-change while running, and use getViewState() / applyViewState(state, { source: "api", action: "restore" }) on Pure Web / Vue3 controllers when an imperative restore API is needed.

Ecosystem	Recommended pattern
Vanilla JS / Pure Web	Use <flyfish-file-viewer toolbar="false"> or mountViewer(container, { options:{ toolbar:false }, onStateChange }); custom DOM buttons can call zoomIn(), printRenderedHtml(), searchDocument(), and other element / controller methods directly. Use viewer-state-change or controller.subscribe() for advanced state sync.
Vue 3	Pass :options="{ toolbar: false }", call downloadOriginalFile(), printRenderedHtml(), exportRenderedHtml(), zoomIn(), zoomOut(), and resetZoom() through the template ref, and sync buttons with @operation-availability-change plus @zoom-change.
Vue 2.7 / 2.6	Use toolbar:false, call instance methods through $refs.viewer, and listen to @viewer-event for operation-availability-change or zoom-change.
React / React Legacy	Prefer useFileViewer({ options:{ toolbar:false } }); pass viewer.props to the component, bind custom buttons to viewer.handle, and read viewer.state.availability / viewer.state.zoom.
jQuery	Use $("#viewer").fileViewer({ options:{ toolbar:false } }); buttons can call $("#viewer").fileViewer("zoomIn") or read capability state through getFileViewerController($("#viewer")).subscribe().
Svelte	Use <FileViewer bind:this={viewer} options={{ toolbar:false }} />; buttons call viewer.zoomIn() / viewer.printRenderedHtml(), with on:viewerEvent or onStateChange for state sync.

Lifecycle And Operation Events

Event / hook	Description
load-start / hooks.onLoadStart	Fires when parsing or downloading starts. Context includes filename, type, source, version, URL, File, and size.
load-complete / hooks.onLoadComplete	Fires when the current document has rendered. Context includes duration, source data, and version.
unload-start / hooks.onUnloadStart	Fires before replace, reset, or component unmount so external state or resources can be saved.
unload-complete / hooks.onUnloadComplete	Fires after the previous document is released. The reason is replace, reset, or component-unmount.
operation-before / operation-cancel	Fires around download, print, HTML export, and zoom actions. Returning false from beforeOperation cancels the action.
operation-availability-change	Fires when download, print, HTML export, or zoom support changes for the active format.
theme-change	Fires when the built-in control selects light or dark mode. The payload is light or dark.
search-change / location-change / zoom-change / view-state-change	Fires when search matches, document anchors, zoom state, or full view-state snapshots change so host UIs, display screens, and reading-position restore flows can stay in sync.

Public Operation API

API	Description
load / update / reload / destroy	Imperatively load, update, reload, and destroy the viewer.
downloadOriginalFile()	Downloads the original file while respecting toolbar and beforeOperation checks.
printRenderedHtml(options?)	Prints the complete rendered document using the best available per-format print adapter. Enabled watermarks are included; pass mask for cover regions.
printWithMask(options?)	Opens the black-cover mask designer, then prints. The designer is async-loaded inside core and works out of the box with component packages.
exportRenderedHtml()	Exports rendered HTML for archiving, audit, or offline review.
zoomIn() / zoomOut() / resetZoom()	Uses the active renderer zoom provider instead of outer CSS transforms that can break coordinates.
searchDocument() / nextSearchResult() / previousSearchResult()	Runs document-level search and navigates highlighted matches.
collectDocumentAnchors() / scrollToAnchor() / scrollToLine()	Collects pages, outline items, headings, or code-line anchors and scrolls to them.
getDocumentTextChunks()	Returns structured text chunks for search, AI provenance, vectorization, and external indexes.
getOperationAvailability() / getZoomState() / getSearchState()	Reads current capability, zoom, and search state for custom toolbars.

Workers, WASM, And Private Deployment

Asset	Description
Shared viewer assets	Every *-full package exposes a file-viewer-copy-assets CLI at the package version. It copies workers, WASM, fonts, and vendor files into the application static directory and writes an integrity manifest. The complete web-full dist/ also carries that payload directly.
CAD / DWG / DXF / DWF	Configure options.cad.wasmPath, workerUrl, dwfWasmUrl, and dxfEncoding for self-hosted or intranet deployment.
PDF / DOCX / Excel / PPT / PPTX	Configure options.pdf.workerUrl, options.pdf.cMapUrl, options.pdf.wasmUrl, options.pdf.standardFontDataUrl, options.pdf.cjkFontFallbackPath, options.pdf.identityFontRepair, options.docx.workerUrl, options.docx.workerJsZipUrl, options.spreadsheet.workerUrl, and options.presentation.workerUrl / workerType; PDF probes the real static worker first and lazy-loads the packaged handler when unavailable, unembedded CJK fonts fall back to self-hosted Noto Sans SC shards loaded per page, and malformed Identity CJK fonts without ToUnicode are repaired in memory after corrupted text is detected; DOCX chooses worker or main-thread parsing automatically, Electron file:// and other unsafe local protocols fall back without user configuration; Excel defaults to worker: auto, enabling Worker automatically for files at or above workerAutoThreshold; CSV / TSV detects UTF-8, GBK, and GB18030 automatically and accepts options.spreadsheet.textEncoding as an explicit override; header drag column resizing is controlled by options.spreadsheet.resizableColumns; .ppt lazy-loads the packaged @file-viewer/ppt@0.3.3 Worker/OffscreenCanvas/WASM runtime with bounded frame caching from vendor/ppt/ without standard-layout configuration; pptModuleUrl / pptWorkerUrl / pptWasmUrl / pptFontUrl only override custom routes. PPTX creates its separate module Worker on demand.
Typst / SQLite / Archive	Configure Typst compiler/renderer WASM, data.sqlWasmUrl, and archive.workerUrl / archive.wasmUrl as needed; Typst renders through local WASM only and never falls back to a public CDN; Archive decodes legacy GBK/GB18030 ZIP entry names, while RAR, 7z, and encrypted archives still require the libarchive Worker/WASM assets.
Drawing	Draw.io uses the official diagrams.net offline viewer shipped with viewer assets by default; override options.drawing.viewerScriptUrl for custom paths, or set preferOfficial:false for the built-in SVG fallback.
Offline deployment	Runtime preview code does not depend on public CDN or third-party online assets. Every *-full package uses file-viewer/ under the deployment base (/file-viewer/ at the origin root). Vite publishes assets with copyAssets:true; other build tools run npx --no-install file-viewer-copy-assets ./public/file-viewer. Call setDefaultFullAssetBaseUrl() when assets live elsewhere.
Deployment principle	Heavy workers, WASM files, and parser libraries stay lazy-loaded and are only requested when the active file type needs them.

Quality Gates

• Component packages only depend on @file-viewer/core and their own ecosystem dependencies. They do not nest through another framework component package.
• Format parsing, search, zoom, print, export, watermark, lifecycle, and beforeOperation semantics all come from the same core.
• Releases should pass type checks, component API verification, README generation checks, format-matrix verification, standalone repository export, and browser smoke tests.

See the official documentation for options, lifecycle hooks, beforeOperation, theme, watermark, search, zoom, print, and export APIs: https://doc.file-viewer.app/

Online demo: https://demo.file-viewer.app/. File Viewer-authored source and component packages generated by this repository use Apache-2.0. Any distribution that includes the @file-viewer/ppt runtime retains its independent LICENSE and NOTICE and does not relicense it under Apache-2.0. For derivative or commercial use, keep clear Flyfish Viewer attribution; shared compatibility fixes are welcome in the matching component repository.