Lines and mark areas disappear during zooming

[dthunn]

Version

5.1.1

Steps to reproduce

While zooming on line graphs the lines break apart, this is same issue as #3637. I have decided to submit this issue because that one is closed but the issue definitely still exists.

What is expected?

Lines stay connected after zooming.

What is actually happening?

Lines become disconnected while zooming

---

This issue has being going on for years it looks like, any help or a fix would be great.

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[dthunn]

I have found the issue that causes it on my end, having yAxis type set to 'log' causes the bug, if I remove it, everything is fine. I would definitely like to keep the log scale on the y-axis is anyone has any ideas.

[locinus]

I indeed believe this issue still exists: markLines defined by two points disappear when zooming in, as at least one of the points is out of the zoomed window, and even with the filterMode: 'none' option.

A possible workaround could be to hook on the 'datazoom' event and save the zoom state:

const zoomState = {};

echartsInstance.on('datazoom', (event) => {
  const option = echartsInstance.getOption();
  if(option.dataZoom && Array.isArray(option.dataZoom) && option.dataZoom.length > 0) {
    zoomState.startValue = option.dataZoom[0].startValue;
    zoomState.endValue = option.dataZoom[0].endValue;
  }
});

and then proceed to recalculate the chart's options, using the zoomState.startValue and zoomState.endValue as the boundaries of the markLines (I would add +1 to the startValue and -1 to the endValue to make sure we're within the zoomed window). Not ideal, but does the job.

[kingyue737]

This bug still exists in v5.4.2. markline should not be filtered

[Zamlos]

This bug still exists. Please, reopen the ticket.

[Comee]

Below is a demo to show the problem.

Demo

[electroheadfx]

This demo @Comee show the MarkLine disappear when I zoom in. The issue still there.

[984803909]

The problem still exists. Is there any other alternative method for directly connecting the two points

[electroheadfx]

just use line series