How does ECharts interact with React?

To use Echarts in React and achieve interaction, you can follow these steps:

1. Echarts React wrapper library: The official Echarts library provides a React wrapper called echarts-for-react. It offers a React component that allows you to use Echarts charts in your React applications. You can use this component to render and update charts, and pass data and configurations to the chart component through props.
2. Firstly, install the echarts-for-react library using npm.
3. Install ECharts for React using npm.
4. Next, import and use echarts-for-react in your React component.
5. The code imports React and ReactEcharts from ‘react’ and ‘echarts-for-react’ respectively. It defines a MyChart functional component that returns a ReactEcharts component with a given option and an event handler for chart events.
6. In the above example, you can customize the chart by defining Echarts configurations in the option object. You can also handle interactive events of the chart by specifying event handlers in the onEvents property. In the example, we specified a handler for the click event.
7. In your React component, you can handle interactive events on a chart by accessing the params parameter in the handleChartEvent function. You can then perform relevant operations based on the event parameters as needed.
8. To use the native interface of Echarts: If you prefer customizing React components and directly using the native interface of Echarts, you can achieve interactivity by initializing and updating Echarts charts within the lifecycle methods of your React components. You can initialize the chart instance using the echarts.init method and update the chart data and configurations using the setOption method.
9. First, make sure you have imported the Echarts library into your project. Then, in your React component, you can initialize and update the chart as follows:
10. This code imports React, useRef, and useEffect from the ‘react’ library, and echarts from the ‘echarts’ library. It defines a component called MyChart that initializes an echarts chart instance using a useRef hook and useEffect hook. The component sets the chart configuration and data, handles chart events, and disposes of the chart instance when unmounted. The JSX returned by the component creates a div element with a ref to the chart, with a specified width and height.
11. In the above example, we used the useRef hook to create a reference for referencing chart elements within a React component. Within the useEffect hook, we initialized an Echarts chart instance and used the setOption method to set the chart’s data and configuration. We also registered an event handler using chart.on method to handle the chart’s interactive events.
12. In the return section of the component, we will pass the ref attribute to the div element to make it the container for the chart. By setting the width and height styles, you can customize the size of the chart.
13. Finally, before the return statement in the component, we use the return directive to return a function that will be called when the component is unmounted. Inside this function, we use the chart.dispose method to destroy the chart instance and release resources. This is a best practice when using the native Echarts interface.