how do i make echarts resize together with the react-grid-layout?

I am using ResponsiveGridLayout, React-Grid-Layout in my application, and I am using echarts as grid items.

The drag and drop works fine, but when i resize the grid item, the chart did not resize together with it. I have tried implementing the onLayoutchange properties, but it is not working.

can someone can help me out here

this is my codesandbox that reproduce the issue

I was able to achieve this, at least when modifying grid items width (not height yet...), by using this hook, then in your chart component :

[...]

const chartRef = useRef<HTMLDivElement>();
const size = useComponentSize(chartRef);

useEffect(() => {
  const chart = chartRef.current && echarts.getInstanceByDom(chartRef.current);
  if (chart) {
    chart.resize();
  }
}, [size]);

[...]

return <div ref={chartRef}></div>;

...so your chart will resize when the grid item is resized. I'm not sure about that, still a WIP for me but it works.

Extract this as a custom hook

You can create useEchartResizer.ts, based on @rehooks/component-size :

import useComponentSize from '@rehooks/component-size';
import * as echarts from 'echarts';
import React, { useEffect } from 'react';
    
export const useEchartResizer = (chartRef: React.MutableRefObject<HTMLDivElement>) => {
  const size = useComponentSize(chartRef);
   
  useEffect(() => {
    const chart = chartRef.current && echarts.getInstanceByDom(chartRef.current);
    if (chart) {
      chart.resize();
    }
  }, [chartRef, size]);
};

Then use it in the component which holds the chart :

export const ComponentWithChart = (props): React.ReactElement => {
  const chartRef = useRef<HTMLDivElement>();
  useEchartResizer(chartRef);

  useEffect(() => {
    const chart = echarts.init(chartRef.current, null);
    // do not set chart height in options
    // but you need to ensure that the containing div is not "flat" (height = 0)
    chart.setOption({...} as EChartsOption); 
  });

  return (<div ref={chartRef}></div>);
});

So each time the div is resized, useEchartResizer will trigger a chart.resize(). Works well with react-grid-layout.