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@github-actions github-actions released this 17 Jul 10:15
0.3.5
d4ea815
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Learn about vigilant mode.

New Web APIs

  • SharedWorker
  • EventSource (including relative URLs)
  • IndexedDB (base implementation)
  • DOMPoint / DOMPointReadOnly; improved DOMRect
  • Various SVG types; SVGAElement.relList
  • Static Response.json, Response.error, Response.redirect
  • GamepadEvent, new event interfaces
  • HTMLScriptElement.supports, DOMTokenList.supports
  • Accessibility.getPartialAXTree (CDP)
  • 6 more interfaces exposed on Worker
  • structuredClone for host (Zig) objects

Events

  • Handler returning false cancels the event; window.event rules; createEvent; timeStamp
  • Event interface conformance: isTrusted, constructor defaults, handleEvent
  • Click activation, shadow retargeting, passive-by-default listeners
  • Listener option validation, window-reflecting handlers, exception propagation
  • Dispatch passes, trusted clicks; listener exceptions routed to onerror
  • Page.navigatedWithinDocument emitted for same-document navigations (CDP)

DOM

  • Range: cloneContents/extractContents/createRange/collapse/deleteContents; replaceChild live-range ordering
  • TreeWalker, NodeFilter, NodeIterator spec conformance
  • Pre-insert validity, Attr adoption, fragment/replaceChild mutation records
  • Insert-adjacent semantics; combined mutation records
  • moveBefore reactions, script insertion steps, cookie-averse documents, outerText
  • HTMLCollection & named-collection property semantics; table row collections
  • document.head, getElementsByName, lastModified, wholeText, UTF-16 offsets
  • Class-token whitespace handling; foreign-element attribute matching
  • AbortSignal conformance (dependent signals, null reason, timeout after detach)
  • Custom elements can extend any HTMLElement interface; fix constructor parser endless recursion
  • Attribute reflection for HTMLAreaElement
  • All interfaces made non-enumerable; more (and better) replaceable properties
  • DOMException flag removed (always on)

CSS / selectors

  • @layer block rules applied to the cascade
  • Fix class selector doing a substring match
  • Quirks-mode class matching; :link/:lang/:empty semantics
  • getPropertyValue special width/height handling
  • ResizeObserver box option default
  • Reject focus() on non-rendered elements (display:none)

CDP (Chrome DevTools Protocol)

  • Emit non-UTF-8 header values as Latin-1 strings rather than byte arrays
  • Support explicit browser-context session_id; expose the Lightpanda version
  • Send a going-away close frame (1001) on pending terminate
  • Don't warn "unimplemented" when deviceScaleFactor == 1

Agent / MCP / scripting

  • MCP: HTTP transport and multi-session support
  • Agent: assistant text streaming, markdown rendering in REPL output, Google Vertex AI support
  • Agent: multi-line slash commands, --save .js extension, intent comments in saved scripts
  • Generate the PandaScript skill from the tool schemas
  • Agent regression suite added to CI (consumed from lightpanda-io/demo), published to Slack, run nightly
  • Script: reject failed goto starts outside the browser isolate; fix two replay crashes

HTTP / Networking

  • HttpClient refactor; curl_easy_setopt refactor
  • Cache: simple heuristic caching
  • fetch honors the redirect option (manual and error modes)
  • Faster certificate loading on Linux/BSD; prefer X509_STORE over ca_blob
  • Default max HTTP size set to 1GB (was unlimited); u32 → usize for very large content lengths
  • Disable Expect: 100-continue with curl; increase default max connections
  • WebSocket messages processed through the delivery queue; reclaim large WS buffers
  • Cookies allowed on a bare domain matching the public suffix list
  • Don't buffer the body on a non-200 robots response
  • Handle text/markdown as plain text; fix charset=unicode HTML prescan fallback

Performance / memory

  • Pre-parse HTML to find and preload scripts
  • Embed element attributes; replace the attribute linked list with an array
  • Cache parsed selectors per frame; cache the computed-style object per element
  • Use cachedParse for closest and waitForSelector
  • Iframes with loading=lazy no longer delay the parent's load event
  • Enforce a minimum timer delay on nested timers
  • Bound scroll task allocations; tighten DOM allocation lifetimes
  • local_arena added; Request/URLSearchParams and more non-DOM types finalized
  • V8 configuration option + heap-limit protection; more headroom at nearHeapLimit

Stability fixes

  • Watchdog for JS hangs
  • Increase HTMLCollection refcount from u8 to u32 (crash)
  • Dupe blobs before use to survive revokeObjectURL (UAF)
  • Fix crash when MessageEvent.source is called from a worker
  • Rework how v8::Globals are managed; detach from the original context when re-using a window
  • Use the element's owner frame when mutating attributes; fix broken cross-frame attribute lookup
  • Don't strip a leading BOM for non-document parsing

CLI / Ops

  • New update command
  • Help output paged through $PAGER when stdout is a tty; standardized help options
  • Prometheus metrics
  • networkIdle lifecycle events emitted for child frames
  • Reduced logging of JsException on event dispatch; stop logging TryCatchRethrow errors
  • Use the getrandom syscall for std.crypto.random
Assets 8
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