[Bug] Unable to achieve line series with areacolor=linecolor

[ob-ARC]

Version

5.3.3

Link to Minimal Reproduction

https://echarts.apache.org/examples/en/editor.html?code=PYBwLglsB2AEC8sDeAoWsAeBBDEDOAXMmurGAJ4gCmRARAMYCGYVA5sAE7m0A0J6AE2aMiAbVoBZGL1i0AKgFcqM2gHUqAlXIAWClQDEOEFQGVmphdFoBdEgF8-6ADZsq0AUSQOS5HPk_e6HhURlSEsKKopLDQjAC2NLIseGC8_LBCYCIRABwATAAMPLAAnADMecUlBQCMVWUALMU1edXNZWVFsDUVBdaOpBTUdE4Q0MoD6IwcVIwmFC6e6ej0wE6cdBysAEaMABQtOc15R90nxQUAdACsAJRp0eicEKxjdCnTqZOkoIz0EBQiDV0oFSKNxvNyItiI9YKt1hxNjt9odjqdUbArncHo8holaHg1hBNN8niA_gDyEDSbAAO7EsDaIEFEH2Wx2IA&_source=echarts-doc-preview

Steps to Reproduce

See link for reproduction.

Current Behavior

Setting the same color to areastyle and linestyle does NOT result in the line being "invisible" (i.e. non-distinguishable from the area). Probably caused by the fact that line and area are actually overlapping. It is possible to simply hide the line of course (width = 0, opacity = 0 or color.alpha = 1), but that also means the legend entry becomes invisible.

Expected Behavior

Line and area should not overlap in rendering.

Environment

- OS:
- Browser:
- Framework:

Any additional comments?

No response

[echarts-bot[bot]]

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[Ovilia]

This is not a bug and it may not easy to achieve what you want. This is because Canvas/SVG line width is shown on both sides of the line, which is most likely because we don't have an idea which is inside and outside. Besides using opaque colors, you can set the lineStyle.width to be 0 if you don't want should the line.

[ob-ARC]

The problem with lineStyle.width=0 is that this will also interfere with the legend, causing the series indicator line being invisible there. Is there a way to come around this by modifying the legend?

[Ovilia]

You can set the borderWidth of legend to be non-zero values. By default, it's 'auto' so the width of the series is used.