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Using SVG Circles For Charting

Lightningat JSConf.Asia 2018 · 2018-01-25..01-27· [data-visualization]
slides:none on file

Builds circular progress indicators with plain SVG and CSS using stroke widths and stroke-dasharray math, not JavaScript, and demonstrates live edits. Uses formula 2πr with a worked example: radius 10 and stroke-width 10 gives circumference 62.8318 so half a circle is 31.4159. Shows inner and outer donuts, tweaks dash offsets, and recovers from a broken live demo to render correct halves and gaps.

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