Function getDataZoomConfig

examples/candlestick-streaming/main.ts:71–83

(candleCount: number)

// Get appropriate dataZoom config based on candle count
function getDataZoomConfig(candleCount: number) {
  if (candleCount <= 200) {
    // Few candles: just inside zoom, show all data
    return [{ type: 'inside' }];
  } else {
    // Many candles: add slider and zoom to recent data
    const showPercent = Math.min(100, Math.max(5, 500 / candleCount * 100));
    return [
      { type: 'inside' },
      { type: 'slider', start: 100 - showPercent, end: 100 },
    ];
  }
}

// Get max candles based on current count (allow some growth for streaming)
function getMaxCandles(candleCount: number): number {