v4.0.0

Major release modernizing fQuery's supported environments, test and release pipeline, and hardening DOM, animation, AJAX, event, queue, and sanitization behavior.

Breaking Changes

• Updated supported Node.js versions to ^20.19.0, ^22.13.0, or >=24.
• Updated @fr0st/core from version 2 to version 3; the _-prefixed FrostCore utilities now follow the version 3 API and behavior.
• Changed $.clearQueue(selector) to clear only the default queue. Pass { queueName: null } to clear every named queue.

Fixed

• Made the package safe to import in Node before registering a DOM implementation, and consistently sourced browser constructors and globals from the configured window.
• Preserved pre-existing inline styles across built-in animation effects and prevented callback errors from stalling the animation scheduler.
• Isolated named queues so completion, rejection, or clearing one queue no longer removes other queues on the same element.
• Corrected AJAX handling for HTTP errors, timeouts, FormData, lowercase methods, falsy payloads, and safely encoded query parameters.
• Corrected cookie lookup and encoding, document readiness, event cloning and dispatch, position and constraint calculations, text-node selections, escaped traversal selectors, cross-realm collections, and debounce recovery after callback errors.
• Hardened HTML sanitization with exact string attribute matching and removal of javascript: URLs from URI attributes.

Improved

• Migrated the browser suite from Mocha and Puppeteer to Playwright across Chromium, Firefox, and WebKit, with deterministic animation clocks and batched assertions.
• Added CI coverage for supported Node.js versions, focused-test protection, generated-bundle verification, package-content validation, and provenance-enabled npm publishing.
• Consolidated project documentation into the README and aligned JSDoc types and @returns conventions with current Frost projects.
• Removed circular source dependencies, retained optimized traversal parsing paths, and aligned static and QuerySet helper signatures.
• Refreshed package metadata, explicit exports, dependency versions, distribution bundles, and source maps.