fix(custom): provide generic for itemStyle. close #16775

[MaXal]

Brief Information

This pull request is in the type of:

• [ x ] bug fixing
• new feature
• others

What does this PR do?

Fixes the TS error in case color is provided as a callback.

Fixed issues

#16775

Details

Before: What was the problem?

series: [
    {
      type: 'custom',
      name: 'trend',
      itemStyle: {
        color: function f(_item){ //TS error
          return "red"
        }
      },

After: How is it fixed in this PR?

Now the generic parameter can be passed to CustomChart to properly define a callback for color property.

Misc

• The API has been changed (apache/echarts-doc#xxx).
• This PR depends on ZRender changes (ecomfe/zrender#xxx).

Related test cases or examples to use the new APIs

N.A.

Others

Merging options

• Please squash the commits into a single one when merging.

Other information

[echarts-bot]

Thanks for your contribution!
The community will review it ASAP. In the meanwhile, please checkout the coding standard and Wiki about How to make a pull request.

[Ovilia]

Was this necessary? It seems to work without this line change and = never doesn't look a good way to define.

[MaXal]

I'm sorry for not getting back to you sooner. I had to provide never to minimize the needed change. If the "never" is omitted, it would require providing a generic argument to CustomSeriesOption, resulting in API changes.

[github-actions]

This PR has been automatically marked as stale because it has not had recent activity. It will be closed in 7 days if no further activity occurs. If you wish not to mark it as stale, please leave a comment in this PR. We are sorry for this but 2 years is a long time and the code base has been changed a lot. Thanks for your contribution anyway.

[github-actions]

This PR has been automatically closed because it has not had recent activity. Sorry for that and we are looking forward to your next contribution.