dev: bump apexcharts from 5.16.0 to 6.4.0

[dependabot]

Bumps apexcharts from 5.16.0 to 6.4.0.

Release notes

Sourced from apexcharts's releases.

💎 Version 6.4.0

A feature release centered on heatmaps and a new bar chart race. Heatmaps gain a continuous numeric and datetime x-axis (cells positioned by real value, not by column index), optional canvas rendering for large grids, and a tooltip that now points at the cell it describes. The bar chart race animates bars and their labels as they re-rank. Two fixes round it out. Existing configs mostly render unchanged; three heatmap defaults change (tooltip placement, zoom, and label thinning), each noted below with how to restore the previous behavior.

✨ Features

Continuous numeric and datetime x-axis for heatmaps

On a numeric or datetime heatmap, cells are now placed at their real x value instead of being tiled one per column by index. Irregular spacing and gaps therefore render as real empty space: a missing hour is a gap in the grid, not a column squeezed away, and the axis shows sparse proportional date and time ticks rather than one label per cell. Rows stay categorical (one series per row).

This is what makes irregular-time and calendar-style heatmaps expressible with plain data shaping. Two new demos are built entirely on it: a server-CPU timeline where a metrics outage shows as a real gap, and a contribution-style calendar with ragged first and last weeks.

Evenly spaced heatmaps are unaffected: their layout is unchanged.

Canvas cell rendering for large heatmaps

With chart.renderer: 'canvas' (or 'auto' past the render threshold) and the tree-shakable canvas feature imported, heatmap cells now paint to a single canvas instead of one <rect> per cell. The DOM node count stays flat regardless of cell count, and paints are roughly 2.8 to 3.5 times faster at high densities. Hover still resolves the exact cell under the cursor and shows its tooltip. Cells that use a fill the canvas cannot reproduce (gradient, pattern, image) fall back to SVG automatically.

Heatmap cells	SVG	canvas
10,000	95 ms	27 ms
50,000	519 ms	170 ms
100,000	1,083 ms	388 ms

import ApexCharts from 'apexcharts'
import 'apexcharts/features/renderer-canvas'
const options = {
chart: {
type: 'heatmap',
renderer: 'canvas', // or 'auto' to switch above rendererThreshold
},
// ...series
}

Bar chart race

A reorder update now animates into a bar chart race. When you re-sort the data and update the chart, the bars slide to their new ranks and their category labels ride along automatically (whenever dynamicAnimation is on). Two opt-in flags complete the effect: dataLabels.animate rides each value label to its bar's new position, and dataLabels.countUp tweens the number from its previous value.

const options = {
  chart: {
    type: 'bar',
    animations: { dynamicAnimation: { speed: 800 } },
  },
  plotOptions: { bar: { horizontal: true } },
  dataLabels: {
    enabled: true,
    animate: { enabled: true }, // value labels ride to the new rank
</tr></table> 

... (truncated)

Commits

• b81d6da release: 6.4.0
• 327f597 chore: bump version to 6.4.0
• 7b1de5b chore: update heatmap samples
• 1705153 fix(data): avoid mutating user series when dataReducer is active
• bfb105e feat(bar): bar chart race with riding labels and count-up
• 9017905 feat(heatmap): canvas cell rendering, above-cell arrow tooltip, and axis polish
• 95b31b4 chore(samples): add high-density heatmap renderer test sample
• 079fb58 feat(heatmap): position cells by value on numeric/datetime x-axis
• a73c381 fix(states): stop the lighten hover filter washing light colors to white
• a061034 release: 6.3.0
• Additional commits viewable in compare view

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