KChart v1.24.1 - Numeric LTTB Performance

Changed

• Added an internal numeric-field LTTB fast path that reads xField and yField directly.
• Preserved Date, string, nullish, mixed-value, and custom-accessor behavior without public API changes.
• Reduced the local 5M-point S1 median from roughly 106-109 ms to 33.7 ms in the verified benchmark environment.

Tests

• Added exact selected-point reference equivalence coverage across thresholds, ties, sparse/non-finite data, and custom accessor precedence.
• Added package export coverage to keep the optimized dispatch internal.
• Verified unit tests, adapter builds, demo build, package dry run, and 1M/5M benchmarks.

KChart v1.24.0 - Range Navigator

Added

• Added the rangeNavigator configuration and createRangeNavigatorOption() factory for number/time axes.
• Added a GitHub Contributors-style weekly commit example with a draggable overview brush.

Changed

• Reserved navigator-aware bottom margins and kept selections synchronized across data updates.

Fixed

• Kept grouped endpoint columns within plot bounds.
• Prevented stale duplicate renders after callback-driven updates or destruction.

Tests

• Added range, layout, and grouped-column geometry regression coverage.

KChart v1.23.0 - WebGL Zoom Stability

Highlights

• Coalesces wheel and drag zoom repaint work to the latest state once per animation frame.
• Preserves immediate zoom callbacks, final gesture rendering, and controller lifecycle cancellation.
• Adds the remaining StackBlitz-ready chart starters.

Verification

• Full unit, package export, adapter, worker, demo build, and runtime dependency checks passed.
• The reviewed 300k-point S3 run recorded zero long tasks and a 50 ms worst frame.

Install

npm install @keneth80/k-chart@1.23.0

KChart v1.22.0 - Axis Title Layouts and Runtime Stability

Added

• Added titleLayout and titleOffset axis options.
• Added horizontal Y-axis titles with automatic collision-aware margins.

Changed

• Bounded OffscreenCanvas worker traffic to one active and one latest queued frame.
• Loaded Cesium and its adapter as optional async chunks in the demo.
• Clarified that normal KChart imports do not include Cesium.

Compatibility

• Existing axis titles remain vertical by default.
• No migration is required.

KChart v1.19.0 - Smooth Realtime Timeline Updates

Added

• Smooth number/time domain interpolation for updateData() with animation.mode: "update".
• A bounded real-time line demo and StackBlitz example for continuous time-series updates.

Changed

• Worker-backed line series keep one render per data update to avoid worker queue backpressure.
• Canvas and OffscreenCanvas backing stores are reused when dimensions are unchanged.
• Superseded render-completion promises now settle correctly when a newer animated frame replaces them.

Usage

animation: {
  enabled: true,
  duration: 250,
  easing: "linear",
  mode: "update"
}

Published package: @keneth80/k-chart@1.19.0

KChart v1.18.1 - Categorical Axis Tick Density Fix

Fixed

• Fixed tickCount being ignored by point and string axes.
• Categorical axes now evenly sample displayed labels through explicit D3 tickValues.
• The first and last category labels are preserved while the complete scale domain and every series position remain unchanged.

Compatibility

• number and time axes retain their existing D3 tick hint behavior.
• Omitting tickCount or setting it to at least the category domain length continues to display every label.
• No migration is required.

Verification

• Added real D3 point, band, and time scale regression tests, including domain and pixel-position preservation and boundary values.

KChart v1.18.0 - Tree & Treemap Visualizations

Added

• Added createTreeSeries with orthogonal and radial layouts, four orientations, hierarchy validation, emphasis, click events, tooltips, and pan/zoom support.
• Added Tree Chart demo, StackBlitz project, API documentation, and regression tests.
• Added a Preset-inspired Treemap demo with metric-proportional areas, StackBlitz project, Usage output, and API documentation.

Improved

• Added implementation comments that explain tree hierarchy validation, layout coordinate conversion, cache behavior, and tooltip hit testing.
• Escaped tree tooltip content and documented the treemap binary partition behavior.

Compatibility

• Backward compatible. No migration is required.

KChart v1.16.1

1.16.1 - 2026-07-10

Added

• Added a realtime time-series line demo with a 250ms sliding time window.
• Added a stackblitz-realtime-line-basic starter showing fixed-size stream data and interval cleanup.

Changed

• Updated the playground/demo realtime usage snippet to avoid unbounded data growth and duplicate axis/data renders.

Packages

• Published @keneth80/k-chart@1.16.1.

KChart v1.16.0

1.16.0 - 2026-07-10

Added

• Added controller.whenRenderComplete() and onRenderComplete so callers can wait for worker-backed Canvas/WebGL render completion.

Changed

• Optimized numeric/time axis domain resolution with explicit min/max skip paths and allocation-free scans.
• Added a numeric fast path for default LTTB downsample accessors.

Packages

• Published @keneth80/k-chart@1.16.0.

KChart v1.15.3

1.15.3 - 2026-07-09

Fixed

• Fixed Waterfall bar width fallback so point scales do not render zero-width bars.

Packages

• Published @keneth80/k-chart@1.15.3.