Call for Testing for Slint 1.19

[ogoffart]

The pre-release/1.19 branch is ready for testing! 🎉
Your feedback is key to catching regressions early and polishing the final release.
Please try the highlights below with your own applications and let us know how it goes.

✨ Highlights in Slint 1.19

• 📁 Project file — a slint-project.json puts your include paths, library paths, and edition in one place, shared by the compiler and the language server. Point your build at the project directory and check that the live preview uses the same settings.

• 🏷 Editions — set "edition": "1.19" to opt into fixes that could change existing behavior: elements created with if or for count toward their parent's size (layouting constraints not respected for items in if or for #407), and a property set by only some states keeps its default in the others (Default height/width properties not taken in account if they are define in some states only #8852). Try switching your project to the new edition and tell us what breaks.

• 🧊 Backdrop blur — the new backdrop-blur property on Rectangle gives a frosted glass effect, with the Skia and FemtoVG renderers.

• 🎞 Animated images — the Image element plays animated GIF, PNG, and WebP.

• 🐢 Reduced motion — animations are skipped when reduced motion is turned on in the system settings (Windows for now).

• 📜 Scroll into view — ensure-visible() on any element, Flickable.scroll-to(), and ListView.ensure-row-visible().

• 🟨 JavaScript & TypeScript — import .slint files as ES modules with generated TypeScript declarations (npx slint-compiler -f typescript), slint-ui/register for Node.js, Deno, and Bun, an esbuild plugin, and FilterModel / SortModel / ReverseModel / Model.map(). (docs).

• 🎨 Figma to Slint — the Figma plugin previews your selection with Slint and exports it as an editable project.

• 🍎 C++ on the web and iOS — build C++ apps with Emscripten, or for iOS.

…and many more fixes — see the full ChangeLog.

🧪 How to test

Try the nightly build with your own projects and report anything that looks like a regression or unexpected behavior.
Per-language install instructions are on the nightly release page:
👉 https://github.com/slint-ui/slint/releases/tag/nightly
Feedback is very welcome via GitHub Issues or on our chat.
Thank you for helping us make Slint 1.19 a great release! 🙏

[mediplex]

Tested the 1.19 pre-release while investigating #14820 — the defect reproduces identically on the 1.19.0-pre slint-viewer (branch pre-release/1.19, --features mcp): 4/4 swallowed presses per close path, same as 1.18.1. Repro bundle, harness and measured matrix in the issue.