react-native-wagmi-charts/lib/module/charts/line/utils/getArea.js

A sweet candlestick chart for React Native

import * as shape from 'd3-shape';
import { scaleLinear } from 'd3-scale';
export function getArea({
  data,
  width,
  height,
  gutter,
  shape: _shape,
  yDomain,
  xDomain,
}) {
  const timestamps = data.map(({ timestamp }, i) => (xDomain ? timestamp : i));
  const scaleX = scaleLinear()
    .domain(xDomain ?? [Math.min(...timestamps), Math.max(...timestamps)])
    .range([0, width]);
  const scaleY = scaleLinear()
    .domain([yDomain.min, yDomain.max])
    .range([height - gutter, gutter]);
  const area = shape
    .area()
    .x((_, i) => scaleX(xDomain ? timestamps[i] ?? i : i))
    .y0((d) => scaleY(d.value))
    .y1(() => height)
    .curve(_shape)(data);
  return area || '';
}
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