Cannot read properties of undefined (reading 'valueX') when using snapTooltip about amcharts5

[samkristoff]

I added a 'refresh' button so I can re-load a data set without panning/zooming the chart and make sure I'm loading the same data each time.

Clicking the refresh button does not throw the error above if I keep the cursor outside the chart. However if I click the refresh button and move my cursor around over the chart the error is thrown.

I save a reference to each series in a map (this.series) the first time I add it to the chart and then update the data with

this.series[seriesName].data.setAll(newData);

[zeroin]

It would be best if you could create a codepen where this issue is reproduced, it would help to figure out the problem - thanks!

[samkristoff]

I was able to reproduce this in JSFiddle using a setTimeout to mock the API call.
https://jsfiddle.net/samkristofftulu/qwrgx7mv/65/

Here is a video demonstrating the issue.
https://share.vidyard.com/watch/LJo4navHWFRv1XU2gsRYsN?

In this example the error is only thrown once per refresh, but when the time range of the data changes or there are multiple series it gets worse and will quickly lock up the chart. I'm working on an example the reproduces that.

[zeroin]

I confirm the bug - we fixed it internally and the issue will be solved with next release. Thanks a lot for helping to find it.

[samkristoff]

Hey zerio, I'm happy to help.

EDIT: Answering my own question below - I disabled the cursor before loading new data and enabled after the load is complete. This prevents the error above and prevents the charts from locking up.

Is there a work around or patch I can try to see if this also prevents my charts from locking up (not sure if this is just a red herring).

Thanks!

[martynasma]

BTW, we'll let you know here when the version with a fix is available.

[martynasma]

Fixed in 5.0.1.

[5.0.1] - 2021-11-05

Fixed

• XYChart with panning enabled an no Animated theme was flickering while panning.
• JS error could occur sometimes if data was updated while cursor was moving over the chart.

Full change log.

Download options.

Make sure you clear your browser cache after upgrading. And feel free to contact us again if you are still experiencing this issue.