This is a mockup of an old Line chart demo that was for a long time, used on the front page of the website. The spline option is enabled, it has a thick linewidth and it's using the trace()
effect.
<script src="../libraries/RGraph.svg.common.core.js" ></script> <script src="../libraries/RGraph.svg.line.js" ></script>
<div style="width: 450px; height: 250px" id="chart-container"></div>This is the code that generates the chart: