PostHog/posthog-js posthog-js@1.416.1

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1.416.1

Patch Changes

• #4443 b2c6830 Thanks @arnohillen! - Harden the session replay stylesheet inlining budget (inlineStylesheetBudgetRules):

  • The default budget (10,000 rules) moves from the recorder chunk into posthog-js session recording options, so npm-pinned or cached bundles keep their configured override (including 0 to disable) and direct rrweb.record() consumers keep unbounded inlining unless they opt in.
  • Deferred inlining is bounded inside a sheet: a resumable cursor stringifies 200 rules per idle slice and emits a sheet's _cssText atomically, so monolithic sheets no longer produce one long task and partial CSS never reaches the wire.
  • Deferred sheets are flushed synchronously when recording stops and on pagehide; residual failure modes are counted via $sdk_debug_replay_deferred_stylesheets_failed / _abandoned.
  • CSSOM-only styles (insertRule output, adoptedStyleSheets) no longer charge the budget, since deferring <link> sheets buys those pages nothing.
  • Telemetry fixes: full-snapshot duration wraps the whole synchronous task, deferred counts are cumulative per session, new gauges cover non-deferrable rules and idle stringification cost, and duration samples straddling tab suspension are discarded ($sdk_debug_replay_discarded_duration_samples). (2026-08-13)

• Updated dependencies [c9086de, b2c6830]:

  • @posthog/core@1.48.0
  • @posthog/types@1.403.1