Limitations

Jint.Browser is not a rendering engine.

• No pixels, screenshots, PDF output, browser window, canvas rendering, WebGL, or media playback.
• No visual layout. Synthetic boxes are deterministic tree rows; text does not wrap and elements are never truly side by side.
• Geometry, hit testing, scrolling, intersection, and resize observations use that synthetic model.
• Images are not downloaded for display; their references are recorded in the request log.
• Child-frame documents can be fetched and parsed, but do not have a script realm. contentWindow is null.
• No IndexedDB, Cache Storage integration for page origins, WebAssembly, CSP enforcement, SharedWorker, or ServiceWorker.
• No drag and drop, clipboard API, touch event dispatch, or native input.
• Hover dispatches movement but not mouse boundary events such as mouseenter.
• contenteditable support is intentionally limited; structural editing such as Enter-created blocks is absent.
• Isolated CDP worlds are aliases, not isolated realms.
• Playwright and Puppeteer compatibility covers supported public/client paths, not every browser or protocol feature.
• The package is not currently trim- or AOT-compatible.

Some CSS values come from AngleSharp's declared cascade rather than a computed layout. Media-query emulation is also limited by what AngleSharp.Css can evaluate.

Prefer feature detection and handle NotSupportedException or protocol errors. Never use synthetic geometry as evidence of real visual placement.