折线图 坐标轴类型time，使用visualMap分段显示，分段处渐变色
Open
support
- Dominant language
- TypeScript
- Stars
- 67.3k
- Forks
- 19.8k
- Avg merge
- 11d 14h
- Merged PRs (30d)
- 8
Description
### Version
4.1.0-release
### Reproduction link
[https://gallery.echartsjs.com/editor.html?c=xXp-lCudId&v=1](https://gallery.echartsjs.com/editor.html?c=xXp-lCudId&v=1)
### Steps to reproduce
Gallery 用例中的option即可复现。增加 递增的visualMap范围会使颜色位置发生移动。
### What is expected?
期望分段接线明显，切不会随着时间范围外的visualMap中的item增加影响颜色位置
### What is actually happening?
分段处为颜色渐变，visualMap增加会使颜色左右移动，甚至整条线为紫色
---
按照时间分段显示折线图
Contributor guide
Assessment
This issue has not been assessed yet.