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Frameworks & web · #chartjs
Draw a static threshold line in Chart.js using an <code>afterDraw</code> plugin. Use <code>getPixelForValue</code> for precise Y-coordinate mapping while strictly guarding against <code>NaN</code> results from out-of-range values.
Learn how to use the Chart.js Decimation plugin to optimize the rendering of massive time-series datasets without losing critical visual outliers.
Chart.js v3+ lets you import only the controllers, scales, and elements you need. Explicit registration via Chart.register() cuts a typical line chart bundle from ~80 kB to ~18 kB gzipped. This post shows the pattern, a Vite+TS worked example, and the runtime gotchas to watch for.
Configure stacked scales, register v4 components, and push new data points without reloading the page.
Add a dynamic horizontal line to Chart.js v4 charts with a lightweight plugin that updates automatically when data changes. Learn the design, implementation, and trade‑offs in this step‑by‑step guide.
Learn how to use the Chart.js Decimation plugin to maintain high performance when rendering thousands of data points in line charts using LTTB and min-max algorithms.
Use Chart.js decimation with LTTB to render large time-series line charts smoothly while keeping raw data for tooltips and export.
Modify Chart.js data arrays in place and call chart.update() to animate transitions without destroying the canvas. A practical look at animation modes, streaming windows, and the performance limits of frequent updates.
Use Chart.js’s Decimation plugin to keep line charts snappy even with thousands of points. Learn the exact config, how it works, and common pitfalls in this concise guide.
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