[Tree chart] Can I add a text such a "+" into collapsing symbol(marker)

[m3rri]

What problem does this feature solve?

In the API,

When I choose a symbol 'empty**', I can change a color of collapsing node of tree chart.

And I want to know that I can add a text into a marker or not.

I got this ▼

marker : '＜span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:#61a0a8;"＞＜/span＞'

I want to make it ▼

'＜span style="display:inline-block;margin-right:5px;border-radius:10px;width:10px;height:10px;background-color:#61a0a8;"＞+＜/span＞'

let user notice it has children nodes.

Thank you.

What does the proposed API look like?

In the API,

When I choose a symbol 'empty**', I can change a color of collapsing node of tree chart.

And I want to know that I can add a text into a marker or not.

[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.

Have a nice day! 🍵

[deqingli]

#8048

[github-actions]

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