3.4.0

Aligns polyfill with spec changes.

Initial value of lastReportedSize changed from 0, 0 to -1, -1 allowing for consistent notifications to be triggered when an element is observed for the first time.

const el = document.createElement('div');
const ro = new ResizeObserver(() => { ... });
ro.observe(el); // Will now notify with size `0, 0`.

w3c/csswg-drafts#3664 (comment)

Does any of this look wrong? Please let us know.

See the full diff on Github. The new version differs by 4 commits:

• spec: update default value for lastReportedSize (#135)
• Bump hosted-git-info from 2.8.8 to 2.8.9
• Bump browserslist from 4.16.3 to 4.16.6
• docs: use v3.3.1

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