Fix isolated point in line chart not closing path

[bautisflow]

With a Line chart representing a time series, isolated points were trying to close a path. This PR fixes this issue by checking that the point is unique using the already present logic that was handling isolated points in between null values.

Current version (4.0.0) jsfiddle showcasing the issue: https://jsfiddle.net/kocz16s2/

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• My changes generate no new warnings
• My branch is up to date with any changes from the main branch

[junedchhipa]

This PR caused this bug - #4855
Hence, I am reverting this and will look for other ways to solve it.

[bautisflow]

Hi @junedchhipa
I think a solution for the linked issue and in order to keep this PR is to check for the length of the series before trying to create a path.

apexcharts.js/src/charts/Line.js

Line 589 in b9c58d7

for (let j = 0; j < iterations; j++) {

By checking it just as this loop is entered both issues could be fixed, and as far as I got it does not seem that it is required to loop over the maximum range of dataPoints for the series for the hidden one.

Let me now if this solution suits the project and if you want me to create a PR

Regards

[junedchhipa]

Sure, please create a new PR