JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://cdnjs.cloudflare.com/ajax/libs/Chart.js/2.1.6/Chart.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.0.0/jquery.min.js"></script>
<canvas id="linechart"></canvas>

<div>
  <a id="current" class="selector" data-index="0">Current</a>
  <a id="forecast" class="selector" data-index="1">Forecast</a>
</div>

JavaScript

$(document).ready(function(){
        var canvas = document.getElementById('linechart');
        var ctx = canvas.getContext('2d');
        var current = [800, 1350, 1400, 1600, 2600, 3100];
        var forecast = [400, 1050, 1200, 1300, 1800, 2400];
        var datasets = [{
            label: "current",
            backgroundColor: "rgba(220,220,220,0)",
            borderColor: "#7bc775",
            pointBackgroundColor: "#7bc775",
            data: current,
          },
          {
            label: "forecast",
            backgroundColor: "rgba(151,187,205,0)",
            borderColor: "#fed477",
            pointBackgroundColor: "#fed477",
            data: forecast,
          }];
        var currentData = [datasets[0]];
        var data = {
          labels: ["2", "4", "8", "12", "16", "20"],
          pointDotRadius: 0,
          pointRadius: 0,
          pointBorderWidth : 0,
          pointHitRadius: 0,
          datasets: currentData
        };
        var step  = 800;
        var max   = 3200;
        var start = 0;
        var config = {
        	type: 'line',
          data : data
        };
        var mychart = new Chart(ctx,config);
        $('.selector').click(function(){
          data.datasets = [datasets[$(this).data('index')]];
          if(mychart!== null){
            mychart.destroy();
            mychart = new Chart(ctx, config);
          }
        });
      });