SnapDOM v2.23.0 — Safari's triple-capture hack is gone

[tinchox5]

We just published v2.23.0 to npm. No breaking changes — drop-in upgrade from any 2.x.

npm i @zumer/snapdom@latest

🦁 The Safari warmup is gone

Since the early days, snapDOM carried a piece of technical debt I never liked: on Safari, every session started with a 3× pre-capture warmup — the same element was captured three times behind the scenes just to work around WebKit's svg-as-image bugs (fonts and nested images not painting on the first draw, WebKit #219770).

It worked, but it made first captures on Safari noticeably slower than everywhere else. That debt is now paid:

• The warmup is completely removed. Instead, toCanvas now does a verified draw: it probe-checks that the SVG actually painted ink before drawing it, bounded to ~600ms worst case. No wasted captures, no cold-start penalty.
• toSvg / toImg with scale, width or height now stay vector on Safari instead of falling back to PNG rasterization — sharper output and less work.

This matters beyond Safari on macOS: every browser on iOS (Chrome, Firefox, Edge, all of them) runs on WebKit, so they all benefit.

It's a big behavioral change in a tricky corner of WebKit, verified against real Safari — but if you hit any regression on Safari/iOS captures, please open an issue. I'm watching this one closely.

🛠 Fidelity fixes

• Entry keyframe animations no longer blank out the captured element (#476)
• Final @font-face declarations without semicolons now parse correctly (#475)
• Nowrap box widths frozen and measure mounts isolated in shadow DOM (#474)
• The image the browser actually shows is what gets frozen (srcset descriptors, type filters, content: url())
• Concurrent captures no longer share session maps and counter state
• Realm-safe element guards — pseudos and per-node handlers survive iframe-content captures
• SVG defs referenced from the root svg's own attributes are now collected
• preCache prefetches mask and border-image URLs
• ::first-letter materialization no longer false-positives on margined elements

🙏 Thanks

Huge thanks to our two new contributors this cycle: @RexSkz (#475) and @mcdyzg (#476) — first PRs, both fixing real-world capture bugs. Welcome aboard!

Full changelog: v2.22.0...v2.23.0

[tinchox5]

V2.23.1 (path released)

• perf: probe ink first in Safari's waitForImgPaint instead of a blind two-frame wait 50ea4eb
• fix: rAF timeout fallback so Safari captures don't hang in occluded windows 104cb06