Revision history for HTML-D3 - Visualise various charts using D3

0.16	Mon Sep 21 07:34:35 PM EDT 2026
	[ Enhancements ]
	- render_heatmap_snippet: new snippet method that generates an embeddable
	  D3 v7 grid heatmap. Accepts an array of [$x, $y, $value] triples and an
	  optional \%opts hashref with keys: color_scheme (YlOrRd/Blues/Greens/
	  Purples/RdPu/YlGnBu, default YlOrRd), x_label, y_label, val_label
	  (tooltip label, default 'Value'), show_values (print value in each cell,
	  auto-suppressed when cell < 28px), cell_padding (0-8 px gap, default 2),
	  legend (colour-scale bar, default on), animated (fade-in with
	  prefers-reduced-motion support, default off). Returns
	  { svg_id => 'heatmap', html => Str }. undef values are silently skipped;
	  duplicate (x, y) pairs: last write wins. Requires Scalar::Util
	  looks_like_number (already in core distribution).

0.15	Wed Sep 16 01:51:38 PM EDT 2026
	[ Enhancements ]
	- render_pie_chart, render_animated_pie_chart, render_pie_chart_snippet: new
	  optional C<separator> key in the C<%opts> second argument controls the
	  character shown between label and value in the legend (default C<'/'>).
	  render_pie_chart and render_animated_pie_chart now accept the optional
	  second hashref argument for the first time; existing callers passing only
	  C<$data> are unaffected.

0.14	Tue Sep 15 09:12:17 PM EDT 2026
	[ Enhancements ]
	- render_pie_chart_snippet: major upgrade. Now accepts an optional second
	  argument \%opts with six keys:
	  - animated (bool, default 0): fan slices in from arc-length 0 using
	    attrTween / d3.easeBackOut.overshoot(1.2) with 800 ms staggered
	    transitions; legend fades in after; respects prefers-reduced-motion
	  - donut (bool, default 0): inner radius 38% of outer; total sum shown
	    in the centre hole
	  - sort_slices ('value'|'label'|'none', default 'none'): sort order
	  - max_slices (int, default 0): collapse tail into an "Other" slice
	  - legend (bool, default 1): HTML legend panel with colour swatches
	  - color_scheme (string, default 'tableau10'): supports tableau10,
	    category10, set2, set3, paired
	  Negative values are silently converted to their absolute value; zero-
	  value slices are silently omitted. Optional \%extra hashref per data
	  point is shown as additional rows in the hover tooltip.
	  svg_id changes from 'chart' to 'pie_chart' for namespace clarity.
	  (Breaking change in svg_id value; all other behaviour is backward-
	  compatible when opts are omitted.)

0.13	Tue Sep 15 06:05:45 PM EDT 2026
	[ Enhancements ]
	- render_zoomable_line_chart_snippet: accept an optional second argument
	  { animated => 1 } to animate the initial line draw on page load.
	  The line traces itself left-to-right via stroke-dashoffset / d3.easeLinear
	  (1200 ms); data-point circles then fade in from opacity 0 over 300 ms
	  (after a 1200 ms delay so they appear only once the line reaches them).
	  Subsequent zoom and reset redraws are never animated.
	  Respects prefers-reduced-motion: when the user has requested reduced
	  motion the chart draws immediately at full opacity.
	  Omitting the second argument or passing { animated => 0 } gives the
	  existing behaviour unchanged (backward-compatible).

0.12	Sun Sep 13 08:14:05 AM EDT 2026
	[ Enhancements ]
	- Added render_animated_bar_chart(): bar chart with on-load grow animation —
	  each bar rises from the baseline using d3.transition() with an 800 ms
	  duration and a 100 ms per-bar stagger, so bars appear one after another
	  from left to right
	- Added render_animated_line_chart(): line chart with on-load draw animation —
	  the line traces itself left-to-right via the stroke-dashoffset technique with
	  d3.easeLinear (1500 ms), followed by data-point circles fading in from
	  opacity 0 once the line is complete
	- Added render_pie_chart(): full-page pie chart with percentage labels inside
	  each slice and a colour legend; slices coloured with d3.schemeCategory10
	- Added render_animated_pie_chart(): same as render_pie_chart() but slices fan
	  out from zero on page load via attrTween/d3.interpolate (1000 ms), with
	  percentage labels fading in once drawing is complete
	- Added render_pie_chart_snippet(): embeddable pie chart fragment returning
	  {svg_id, html} — no page shell, no D3 CDN tag; caller loads D3
	[ Tests ]
	- Test::HTML::T5 doesn't build on a number of platforms, so
	  remove the dependancy.  Hopefully this will be fixed at sometime.

0.11 Thu Sep 10 09:32:08 PM EDT 2026
	[ Bug Fixes ]
	- render_zoomable_line_chart_snippet: the y-axis lower bound was
	  hard-coded to 0, causing data points with negative Y values to be
	  plotted off-screen below the x-axis.  Changed to
	  Math.min(0, d3.min(newData, d => d.value)) so the domain extends
	  downward when the data contains negative values (e.g.
	  accounting-notation amounts).

0.10 Fri Aug 28 08:57:09 PM EDT 2026
	[ Enhancements ]
	- Added render_zoomable_line_chart_snippet(): embeddable line chart with brush-to-zoom — drag to select an x-axis range, animated transition to the zoomed view, incremental re-zoom on the zoomed view, and a Reset zoom button to restore the full dataset

0.09	Thu Aug 27 09:16:02 PM EDT 2026
	[ Enhancements ]
	- render_line_chart_snippet: accept an optional third element per data pair — a hashref of extra key/value pairs serialised as an "extra" property in the D3 data binding and appended as additional rows in the mouseover tooltip

0.08	Thu Aug 27 01:30:10 PM EDT 2026
	[ Enhancements ]
	- Use Params::Get
	- Added test dashboard
	- Added support for Object::Configure
	- Added render_line_chart_snippet() returning an embeddable {svg_id, html} fragment for use in Mojolicious TT (and similar) layouts without post-processing
	[ Bug Fixes ]
	- Escape </b> as <\/b> in all JavaScript tooltip .html() strings to fix html-tidy '<' + '/' + letter failures on cpantesters
	  https://www.cpantesters.org/cpan/report/8321add6-d178-11ef-8e88-00fe6d8775ea

0.07	Fri Jan 10 21:16:49 EST 2025
	Added support for interactive legends

0.06	Thu Jan  9 21:51:36 EST 2025
	Added support for legends

0.05	Wed Jan  8 21:04:21 EST 2025
	Added support for animated tooltips

0.04	Tue Jan  7 21:26:42 EST 2025
	Added support for line charts with tooltips
	Added support for multiple line charts with tooltips

0.03	Mon Jan  6 20:55:12 EST 2025
	Added line chart support
	Use JSON::MaybeXS instead of JSON

0.02	Mon Jan  6 10:13:11 EST 2025
	Fix CI breakage

0.01	Mon Jan  6 09:47:22 EST 2025
        First draft - POC: generates bar charts only