v10.0.0-alpha.1

10.0.0-alpha.1 (2026-07-30)

• feat!: v10 — docs, npm provenance, Dependabot (aced5cc)

Bug Fixes

• cross-window observation + report measured 0 (not undefined) (0b3bcb7), closes #100 #109 #113 #103

BREAKING CHANGES

• The default export has been removed. Use the named export instead:
  import { useResizeObserver } from "use-resize-observer";
  The "use-resize-observer/polyfilled" entrypoint has been removed, along with the
  @juggle/resize-observer dependency. The package now has zero runtime dependencies.
  React 16.8 - 17 are no longer supported; the peer range is now ^18.2 || ^19.
  react-dom is no longer a peer dependency.
  Output now targets ES2020; IE 11 is no longer supported.

Co-Authored-By: Claude Opus 4.8 noreply@anthropic.com