Export types for formatter callback params

[sthenault]

What problem does this feature solve?

would allow to define callback formatter with properly typed arguments: for now I have to type params to any, loosing typing within the formatter function. For instance:

    tooltip.formatter = (params: any) => {
        // access to whatever in params is allowed
        ...
        return content;
    };

What does the proposed API look like?

As I get it, params is expected to be of FormatterParams type, so exporting in within echarts.d.ts would allow something along the line of :

import {FormatterParams} from "echarts";

...
tooltip.formatter = (params: FormatterParams) => {
        // compilation error on access to something to defined in FormatterParams
        return content;
    };

[echarts-bot]

Hi! We've received your issue and please be patient to get responded. 🎉
The average response time is expected to be within one day for weekdays.

In the meanwhile, please make sure that you have posted enough image to demo your request. You may also check out the API and chart option to get the answer.

If you don't get helped for a long time (over a week) or have an urgent question to ask, you may also send an email to dev@echarts.apache.org. Please attach the issue link if it's a technical question.

If you are interested in the project, you may also subscribe our mailing list.

Have a nice day! 🍵

[azureabaaba]

模块“"echarts"”没有导出的成员“FormatterParams”。