Candlestick Chart | Render issue | On render the chart does not render until I apply selection to volume

[Charlvdm1]

Candlestick Chart | Render issue | On render the chart does not render until I apply selection to volume

Summary

As mentioned above when my candlestick chart is loaded it is not yet displayed until I make a selection on the volume bar chart it is linked to. So far I presume this has to do with the fact that I am not creating an instance of ApexCharts and then firing the render function. However, that wouldn't be possible (as far as I know) as I am using functional components.

I have created a code sample below which is based off of your demo of the candlestick bar chart combo where this issue also occurs.

The chart is being used inside a NextJS application.

Code Example

// Options separated into its own file for readability
import { ApexOptions } from 'apexcharts';

export const optionsBar: ApexOptions = {
  chart: {
    height: 160,
    type: 'bar',
    brush: {
      enabled: true,
      target: 'candles',
    },
    selection: {
      enabled: true,
      xaxis: {
        min: new Date('20 Jan 2017').getTime(),
        max: new Date('10 Dec 2017').getTime(),
      },
      fill: {
        color: '#ccc',
        opacity: 0.4,
      },
      stroke: {
        color: '#0D47A1',
      },
    },
  },
  dataLabels: {
    enabled: false,
  },
  plotOptions: {
    bar: {
      columnWidth: '80%',
      colors: {
        ranges: [
          {
            from: 0,
            to: 50,
            color: '#FF5C5C',
          },
          {
            from: 51,
            to: 100,
            color: '#34D1A6',
          },
        ],
      },
    },
  },
  stroke: {
    width: 0,
  },
  xaxis: {
    type: 'datetime',
    axisBorder: {
      offsetX: 13,
    },
  },
  yaxis: {
    labels: {
      show: true,
      style: {
        colors: '#9b9eab', // Color for x-axis labels
      },
    },
  },
};

export const optionsCandlestick: ApexOptions = {
  chart: {
    type: 'candlestick',
    height: 290,
    width: 500,
    id: 'candles',
    toolbar: {
      autoSelected: 'pan',
      show: false,
    },
    zoom: {
      enabled: false,
    },
  },
  plotOptions: {
    candlestick: {
      colors: {
        upward: '#34D1A6',
        downward: '#FF5C5C',
      },
    },
  },
  xaxis: {
    type: 'datetime',
    axisTicks: {
      show: false,
    },
    labels: {
      show: false,
    },
    axisBorder: {
      show: false,
    },
    tooltip: {
      enabled: false,
    },
  },
  grid: {
    borderColor: '#303030',
  },
  yaxis: {
    decimalsInFloat: 0,
    labels: {
      style: {
        colors: '#9b9eab',
      },
    },
  },
  tooltip: {
    enabled: true,
    shared: true,
    followCursor: true,
    intersect: false,
    inverseOrder: false,
    theme: 'dark',
    style: {
      fontSize: '14px',
      fontFamily: 'inherit',
    },
    x: {
      show: true,
      format: 'dd MMM yyyy',
    },
    marker: {
      show: true,
    },
    fixed: {
      enabled: false,
    },
  },
};

// I am using NextJS
'use client';
import React, { useEffect, useState } from 'react';
import dynamic from 'next/dynamic';
import { optionsBar, optionsCandlestick } from './options/options';
import { Box, Flex, Select, Text } from '@chakra-ui/react';
import { BsChevronDown } from 'react-icons/bs';

const ApexChart = dynamic(() => import('react-apexcharts'), { ssr: false });

interface CandlestickData {
  name: string;
  data: { x: number; y: [number, number, number, number] }[];
}

interface VolumeData {
  name: string;
  data: { x: number; y: number }[];
}

const CandleStickChart: React.FC = () => {
  const [ohlcData, setOhlcData] = useState<CandlestickData[]>([]);
  const [volume, setVolume] = useState<VolumeData[]>([]);

// generating some random data for the example
  const generateRandomData = (count: number, minValue: number, maxValue: number): number[] => {
    const data: number[] = [];
    for (let i = 0; i < count; i++) {
      const randomValue = parseFloat((Math.random() * (maxValue - minValue) + minValue).toFixed(2));
      data.push(randomValue);
    }
    return data;
  };

  const generateCandlestickData = (
    count: number
  ): { x: number; y: [number, number, number, number] }[] => {
    const data: { x: number; y: [number, number, number, number] }[] = [];
    const startDate = new Date('2024-01-01').getTime();
    const interval = 24 * 60 * 60 * 1000;

    for (let i = 0; i < count; i++) {
      const timestamp = startDate + i * interval;
      const randomValues = generateRandomData(12, 1, 100);
      data.push({ x: timestamp, y: randomValues });
    }

    return data;
  };

  const generateBarChartData = (count: number): { x: number; y: number }[] => {
    const data: { x: number; y: number }[] = [];
    const startDate = new Date('2024-01-01').getTime(); // Start date for the data
    const interval = 24 * 60 * 60 * 1000; // 1 day interval in milliseconds

    for (let i = 0; i < count; i++) {
      const timestamp = startDate + i * interval;
      const randomValue = Math.floor(Math.random() * 100); // Generate a random value for the bar chart
      data.push({ x: timestamp, y: parseFloat(randomValue.toFixed(2)) }); // Round to 2 decimal places
    }

    return data;
  };

  useEffect(() => {
    const seriesCandlestick = [
      {
        name: 'series-1',
        data: generateCandlestickData(30),
      },
    ];

    const seriesBar = [
      {
        name: 'volume',
        data: generateBarChartData(30),
      },
    ];
    setOhlcData(seriesCandlestick);
    setVolume(seriesBar);
  }, []);

  return (
    <Box bg='tertiaryBackground' w={'xl'} p={4}>
      <Flex justify='space-between' mb={4}>
        <Flex direction='column'>
          <Flex justify='flex-end' align='baseline'>
            <Text fontSize='18px' color='#9b9eab' mr={2}>
              APPL
            </Text>
            <Text fontSize='32px' color='white'>
              119.00
            </Text>
          </Flex>
          <Flex direction='row'>
            <Text color='green' mr={2}>
              +16.87
            </Text>
            <Text color='green'>(8.12%)</Text>
          </Flex>
        </Flex>
        <Flex>
          <Select
            bg='tertiaryBorderGrey'
            py={2}
            borderRadius='md'
            icon={<BsChevronDown />}
            iconColor='white'
            width={112}
            mr={2}
          >
            <option value='1M'>1M</option>
            <option value='3M'>3M</option>
            <option value='1Y'>1Y</option>
            <option value='3Y'>3Y</option>
            <option value='YTD'>YTD</option>
          </Select>
          <Select
            bg='tertiaryBorderGrey'
            py={2}
            icon={<BsChevronDown />}
            iconColor='white'
            width={112}
          >
            <option value='1M'>Settings</option>
            <option value='3M'>3M</option>
            <option value='1Y'>1Y</option>
            <option value='3Y'>3Y</option>
            <option value='YTD'>YTD</option>
          </Select>
        </Flex>
      </Flex>
      <Box id='chart-candlestick'>
        <ApexChart
          options={optionsCandlestick}
          series={ohlcData}
          type='candlestick'
          height={248}
          width={500}
        />
      </Box>
      <Box id='chart-bar'>
        <ApexChart options={optionsBar} series={volume} type='bar' height={100} width={500} />
      </Box>
    </Box>
  );
};

export default CandleStickChart;

On the plus side - the connection between the two charts is alive and well 😅 It re-renders and then draws the chart data when I select some data from the volume bar chart.

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