[Bug] itemStyle.color配置成回调函数时，lineStyle.color无效 about echarts HOT 8 CLOSED

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- OS: windows 10
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This does not appear to be a bug, in my opinion. When itemStyle.color is defined as a callback function, it has the capability to return different colors based on varying data indices. However, lineStyle.color does not support using different colors for different data indices. As a result, when it is specified as a callback, it defaults to the series color as a graceful fallback.

from echarts.

This behavior does not match the document description, and the returned value belongs to a reasonable color range. It is unreasonable to assume that it is not a bug simply because it is returned using a callback function. Especially when the document explicitly states that lineStyle can inherit from itemStyle, this detail is illogical and independent of whether itemStyle uses callback function methods.

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if it's no a bug, how to choose when I need to modify the color of a segment of a line based on different numerical values, but it is not a gradient scene？ @Ovilia

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Currently, ECharts doesn't have the ability to set line styles of different segments, if visualMap doesn't count.

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Perhaps adding support for callback function types to lineStyle would be more in line with the documentation's explanatory logic.
@Ovilia When there are multiple series, visualMap cannot support the simultaneous use of multiple configurations, and conflicts will be automatically merged.

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#17138 Maybe you can follow this feature. This is an epic feature so it's still in pending state and I don't know if when I have time to do this.

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ok, i know that

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