echarts-for-react resize
To resize an ECharts chart in a React component, you can use the `onEvents` prop and handle the `resize` event to update the chart size.
First, import the necessary dependencies:
```jsx
import ReactEchartsCore from 'echarts-for-react/lib/core';
import echarts from 'echarts/lib/echarts';
import 'echarts/lib/chart/line';
```
Then, create a state variable to hold the chart options:
```jsx
const [chartOptions, setChartOptions] = useState({});
```
Next, create a function to handle the chart resize event:
```jsx
const handleChartResize = () => {
  const chart = InstanceByDom(chartRef.current);
  if (chart) {
    size();
  }
};
```
In the render method, set up the chart component with the `onEvents` prop:
```jsx
<ReactEchartsCore
  echarts={echarts}
  ref={chartRef}
  option={chartOptions}
  onEvents={{ resize: handleChartResize }}
/>
```
Finally, whenever the chart size needs to be updated, modify the `chartOptions` state variable:
```jsx
useEffect(() => {
  // Fetch or calculate new data
  const newData = fetchData();
 
  // Update the chart options
  setChartOptions({
    ...chartOptions,
resize函数c++    series: [
      {
        name: 'Line',
        type: 'line',
        data: newData,
      },
    ],
  });
}, [chartOptions]);
```
By calling `size()` in the `handleChartResize` function, the chart will resize appropriately whenever the container resizes.

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