MUST be used whenever integrating CogniteFileViewer into a Flows app to preview CDF files (PDFs, images, text). Do NOT manually wire up react-pdf or file resolution — this skill handles installation, Vite config, worker setup, and component usage. Triggers: file viewer, file preview, CogniteFileView

Integrate CogniteFileViewer Add CogniteFileViewer to this Flows app to preview CDF files (PDF, image, text). Dependencies The file viewer library files (copied in Step 2) require this npm package: Package Version react pdf ^9.1.1 pdfjs dist ships as a dependency of react pdf at the correct version — do not install it separately. react and @cognite/sdk are assumed to already be present in Flows apps. Your job Complete these steps in order. Read each file before modifying it. Step 1 — Understand the app Read these files before touching anything: package.json — detect package manager ( packageManager field or lock file) and existing deps vite.config.ts — understand current Vite setup The component where the viewer should be added Step 2 — Copy the file viewer source files The file viewer library lives in the code/ directory next to this skill file. Read and copy all files from there into src/cognite file viewer/ inside the app: code/types.ts code/mimeTypes.ts code/fileResolution.ts code/useViewport.ts code/useFileResolver.ts code/useDocumentAnnotations.ts code/DocumentAnnotationOverlay.tsx code/CogniteFileViewer.tsx code/index.ts The PDF.js worker is configured inside CogniteFileViewer.tsx — no separate consumer setup is needed. Step 3 — Install dependencies Install react pdf (see Dependencies above) using the app's package manager: pnpm → pnpm add react pdf@^9.1.1 npm → npm install react pdf@^9.1.1 yarn → yarn add react pdf@^9.1.1 pnpm users: pnpm's strict linking may prevent the browser from resolving pdfjs dist . Either add pdfjs dist as a direct dependency ( pnpm add pdfjs dist ), or add public hoist pattern[]=pdfjs dist to .npmrc . Step 4 — Configure Vite Add optimizeDeps.exclude: ['pdfjs dist'] to vite.config.ts to prevent Vite from pre bundling pdfjs dist (which breaks the worker): Step 5 — Use the component Import and render CogniteFileViewer from the locally copied files: Get the sdk from the useDune() hook (already available in every Flows app): Supported file types Type Formats PDF .pdf — page navigation, zoom, pan, diagram annotation overlay Office documents Word, PowerPoint, Excel, ODS, ODP, ODT, RTF, TSV — converted to PDF via the CDF Document Preview API, then rendered identically to PDF Image JPEG, PNG, WebP, SVG, TIFF — zoom, pan, rotation Text .txt , .csv , .json — rendered as preformatted text Other Falls back to renderUnsupported Minimal usage This is all you need — zoom, pan, and touch gestures are handled internally: The component needs a defined height. If the parent has no explicit height, the viewer will collapse to zero. Always set a height via style , className , or the parent container. File source Pass any of three source types: Prefer instanceId when available — it's the only source type that enables the diagram annotation overlay. When listing files via sdk.files.list() , check file.instanceId first: Full props reference Tips & tricks Reset page, zoom and rotation when the source changes. The component does not reset these automatically when you switch files — do it yourself: Gate pagination UI on numPages 0 . onDocumentLoad only fires for PDFs. Don't render pagination controls until you know there are pages to paginate: Annotation click → navigate to linked file. annotation.linkedResource contains the space and externalId of the linked CDF instance. Match it against file.instanceId to navigate: Touch support is built in. Two finger pinch to zoom and two finger drag to pan work on touch devices automatically. No configuration needed. Pan is middle click drag (when zoomed in) on desktop. Left click remains free for annotation clicks and text selection. Ctrl/Cmd + wheel zooms toward the cursor — also built in. Wire zoom / onZoomChange if you want programmatic zoom buttons or to persist zoom state; otherwise it works fully uncontrolled. renderOverlay receives original page dimensions ( originalWidth , originalHeight ) so you can set up an SVG viewBox in the original coordinate space. Paths drawn in PDF point or image pixel coordinates will map correctly to the rendered page at any zoom level. Common pitfalls Problem Cause Fix Failed to resolve module specifier 'pdf.worker.mjs' pdfjs dist not hoisted (pnpm) Add public hoist pattern[]=pdfjs dist to .npmrc , or pnpm add pdfjs dist directly API version does not match Worker version pdfjs dist version mismatch between app and react pdf Do not install pdfjs dist separately — let react pdf provide it. If already installed, remove it Annotations never show instanceId is undefined — annotation overlay is disabled without it Use instanceId source, or fall back and accept no annotations for classic files Annotations show but are empty File has no CogniteDiagramAnnotation edges in CDF Expected — only P&ID/diagram files synced to the data model have annotations Viewer collapses to zero height Parent has no explicit height Set height via style , className , or parent CSS

integrate-file-viewer