v4.0.0 - 2026-04-08

Added

• Bun-based test serve script and open helper.
• Biome configuration for linting/formatting.
• Shared button-controls helper for examples and tests.
• Browser support notes in the README (Pointer Events + jQuery 4 policy).
• mise.toml to pin Bun for contributors.
• Transparent image test coverage (PNG/GIF/WebP/SVG/AVIF) with a checkerboard background.
• QUnit coverage for zero-image init, pointer fallback, and transparent format init.

Changed

• Build pipeline now uses Bun scripts and esbuild for JS/CSS minification.
• Tests are run in the browser via a local server instead of PhantomJS.
• Pointer Events are used for drag interactions, with mouse/touch fallback.
• Clip updates now use clip-path with clip as a legacy fallback.
• README updated to reflect new tooling, browser support, and the upcoming vanilla alternative.
• jQuery 4 is now the supported baseline (older versions are not officially supported).

Removed

• Dropped the IE naturalWidth/Height shim in favor of native properties.
• Hammer.js dependency (no longer required).
• Legacy dev tools: jshint, csslint, node-qunit-phantomjs, copy-cli, uglify-js, and qunit (unused in-browser CDN remains for tests).
• Outdated README credits for removed polyfills.
• JSLint loop annotations.