Ngx-charts: Line chart data point is not displayed when value is 0

[ianfdk]

I'm submitting a ... (check one with "x")

[x] bug report => search github for a similar issue or PR before submitting
[ ] feature request
[ ] support request => Please do not submit support request here

Current behavior
When a data point's value is 0, it does not display a point and is therefore not selectable

Expected behavior
Data point should be displayed and selectable even if the value is 0

Reproduction of the problem
You can actually test in the demo ... Change one of the data values to 0

What is the motivation / use case for changing the behavior?
Displaying additional information about data, whatever the value is.

Please tell us about your environment:
OSX

• ngx-charts version: x.x.x
  latest, 5.3.1

• Angular version: 2.x.x
  4.1.1

• Browser: [all | Chrome XX | Firefox XX | IE XX | Safari XX | Mobile Chrome XX | Android X.X Web Browser | iOS XX Safari | iOS XX UIWebView | iOS XX WKWebView ]
  Chrome 58.0.3029.110

• Language: [all | TypeScript X.X | ES6/7 | ES5]
  Typescript

[zbagley]

Temporary workaround is to set value to a tiny value ~=0 such as 0.00000000000000001, and can likely be used as a fix.

[upendrasengarmbwk]

Is there any other fix for this ?

[zbagley]

The only other fix I know of is to use a string "0" for the value.