dom-layout-shim 0.2.0

Minor Changes

• ff1ef3b: Patch offsetTop, offsetLeft, and offsetParent from the layout snapshot.

  Previously, these properties came from the host DOM implementation and could
  disagree with the engine's geometry:

  element.offsetTop;
  element.offsetLeft;
  element.offsetParent;

  They now describe the element relative to its layout-backed CSS offset parent,
  including positioned ancestors, borders, margins, and scrolling.

• a6bdc8b: Implement Element.scrollIntoView() against the layout snapshot so calls
  consistently affect layout-backed geometry instead of relying on the host DOM
  implementation.

  The method scrolls nested containers and the configured viewport using boolean
  or block/inline alignment options. Smooth behavior is applied immediately
  to keep test layout deterministic.

• 8be6e4f: Support adjacent (+) and general (~) sibling combinators in stylesheet selectors.

• 68fc5d9: Answer window.matchMedia() queries from the configured layout viewport.

  Previously, matchMedia() used the DOM environment's viewport, which could
  disagree with the dimensions used by the layout engine:

  await attachLayoutEngine({
    window,
    viewport: { width: 320, height: 640 },
  });
  
  // Previously: false when the DOM environment was wider than 500px
  window.matchMedia("(max-width: 500px)").matches;

  It now evaluates the query against the configured 320px-wide layout viewport:

  // Now: true
  window.matchMedia("(max-width: 500px)").matches;

• 3724069: Recompute layout after style elements are added or changed and after existing CSSOM rules are edited or deleted.

• b26f8ce: Add an unsupported CSS reporter that reduces warning streams to a stable
  adoption-cost summary across a test suite.

  Previously, consumers had to build their own aggregation around onWarning:

  const warnings = [];
  
  await attachLayoutEngine({
    window,
    unsupportedCss: {
      onWarning: (warning) => warnings.push(warning),
    },
  });

  The reporter now deduplicates declarations and exposes one headline count with
  sorted diagnostic details:

  const reporter = createUnsupportedCssReporter();
  
  await attachLayoutEngine({
    window,
    unsupportedCss: { onWarning: reporter.onWarning },
  });
  
  const { unsupportedDeclarationCount, declarations } = reporter.getSummary();