Some of Echarts' internal types should be exported (eg: ElementEvent)

[iuliust]

Version

5.1.2

Steps to reproduce

Try to get a reference to the ElementEvent type of echartsInstance.on(eventName, (event) => {...})

What is expected?

In a typescript project, we should be able to get the reference to the ElementEvent type, among other types.

What is actually happening?

There's no way to get a clean reference to the type

---

In general, a very, very limited part of Echarts' internal types are exported. This is a big problem, because when I want to declare an observable of ElementEvent, it is just impossible.
I want to be able to have the following code :

import { ElementEvent } from 'echarts';
// ...

export class ChartComponent {
  chartClickEvents = new Subject<ElementEvent>(); // Unfortunately, it's impossible because Echart's types are almost never exported...

  constructor() {
     // ...
     this.echartsInstance.on('click', event => {
        this.chartClickEvents.next(event);
     });

     this.chartClickEvents.pipe(
          tap(e => {
                  // do stuff...
           }),
     ).subscribe();
  }
}

[echarts-bot]

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[echarts-bot]

This issue is labeled with difficulty: easy.
@iuliust Would you like to debug it by yourself? This is a quicker way to get your problem fixed. Or you may wait for the community to fix.

Please have a look at How to debug ECharts if you'd like to give a try. 🤓