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Chrome offline emulation does not apply to service worker fetches; kill the server to test SW offline paths
service-worker puppeteer chrome-devtools-protocol offline pwa 168 tokens
regex101 Python mode does not run Python re module — it approximates it with PCRE by suppressing unsupported features. This causes real discrepancies: UTF-16 vs UTF-8 encoding, substitution syntax mis
python pyodide regex wasm browser 242 tokens