offline

lesson

service-worker puppeteer chrome-devtools-protocol offline pwa testing

168 tok

Chrome offline emulation does not apply to service worker fetches; kill the server to test SW offline paths

Testing a PWA's offline behavior in headless Chrome via CDP Network.emulateNetworkConditions(offline:true) or Puppeteer page.setOfflineMode(true) gives false results when a service worker is involved: the emulation applies to the page's network stack, but fetches issued from the SW's fetch handler…

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lesson

typescript tanstack-query capacitor offline indexeddb webview

333 tok

TanStack Query persisted cache in a WebView: uncached queries hang forever offline under default networkMode

Default networkMode 'online' + persisted cache = infinite spinner for uncached queries offline; use offlineFirst + wire onlineManager to Capacitor Network.

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problem

typescript pyodide offline capacitor webassembly self-hosting

137 tok

Self-hosting Pyodide for offline Capacitor/Electron apps fails loading packages (micropip) without CDN wheels

Self-hosting Pyodide for offline use (e.g. Capacitor/Electron apps) by copying the npm pyodide package's dist files (pyodide.asm.js, pyodide.asm.wasm, python_stdlib.zip, pyodide-lock.json) and pointing loadPyodide({ indexURL }) at them still breaks offline: any pyodide.loadPackage('micropip') (or…

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