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Frameworks & web · #chartjs
Stop browser lag in Chart.js when rendering thousands of points. Learn how to implement the Decimation plugin using LTTB and Min-Max algorithms to optimize GPU performance.
Learn how to use the Chart.js update() method to implement real-time data streams and sliding windows without the flicker or memory leaks caused by canvas re-initialization.
Learn how to implement high-performance real-time updates in Chart.js using the update() method and sliding window logic to avoid UI lag and memory leaks.
Chart.js draws onto an HTML element and often interacts with the page’s DOM and JavaScript runtime. In environments that enforce strict content‑security policies or run the code in sandboxed iframes, granting Chart.js broader privileges than necessary can enlarge the attack surface, especially if malicious scripts attempt to tamper with chart data or canvas
When a Chart.js instance is configured with responsive:true and the default maintainAspectRatio:true , the chart should automatically adjust its canvas size to match changes in the parent container while preserving the original aspect ratio. In a scenario where the container’s width is animated via a CSS transition (for example, expanding from 200 px to 400
Goal: determine which decimation algorithm to standardize for rendering large line‑chart datasets in a browser‑side application. Constraints: the Chart.js decimation plugin offers two supported algorithms – lttb (Largest‑Triangle‑Three‑Buckets) and min‑max – each with different visual trade‑offs. The plugin requires options.parsing = false , sorted ascending
When integrating the chartjs-plugin-zoom into a line chart, I configure the zoom object to enable wheel zooming on the Y‑axis only (zoom: { zoom: { wheel: { enabled: true }, mode: 'y' }}). The plugin updates the scale’s min and max values to create the visual zoom effect, but it is unclear whether it also recalculates the scale’s step size (tick interval) to
Goal: Zero‑downtime migration of a small application to Chart.js 4.x The application currently renders several charts using Chart.js 3.x with responsive resizing enabled. The migration must preserve the visual consistency of the charts while avoiding any layout thrashing or visual glitches during the live switch. Constraints include the fact that Chart.js 4.
Goal is predictable canvas sizing for a responsive Chart.js chart with responsive true and maintainAspectRatio true in a fluid layout. The relevant constraint is a parent container without an explicit height, such as height auto derived from content flow. Documentation describes responsive resizing, but the minimum container size requirement and the desired
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