Standard
Web API letting scripts run on background browser threads, enabling parallel work like parsing or encoding without blocking the main UI thread.
For months the pipeline answered in four or five seconds with the right page count and no error, while recall against a known word list sat at zero. Five faults were stacked downstream of recognition, three of them silent by design.
Reality
An open-source browser arcade puts eight games behind one shell interface at about 35 kB gzipped with no runtime dependencies. The rules files import neither DOM nor Canvas, and a mid-project redesign never reached them.
Reality
LensUp's scanner runs entirely in the browser tab. On a mid-range phone the PDF is ready only after the tap's transient activation has expired. The team now reads navigator.userActivation.isActive and degrades to a second tap.
Reality
The dev.to writeup behind it argues for keeping every session on infrastructure you own, because a sampled replay tool captures a silent failure only by luck and click-based frustration signals never see scroll or drag.
Reality
enableWorker defaults to true and stays true when no worker exists, so the config that looks right proves nothing. One line of resource timing tells you which thread is actually doing the transmux.
Reality
A dev.to walkthrough traces the tab crash to two optimization targets pointing opposite ways. The repair it proposes lands in every generative node rather than in the export button, which is where the adoption cost actually sits.
Reality
A browser image tool's writeup on binary-searching JPEG quality, and on PNG, where the quality-shaped proxy it searches cannot address 155 of the 255 available palette sizes.
Reality
A 40-move review costs 160 core-seconds that nobody can cache. Compiling Stockfish to WebAssembly takes that off the server ledger and puts it on hardware you cannot measure.
Reality