function toggleAnimate()

in src/sandbox.js [87:124]
37 lines of code
3 McCabe index (conditional complexity)

  function toggleAnimate () {
    chart_instance.this_chart().interrupt();
    if (chart_instance.animation() == "on") {
      chart_instance.current_year(Math.floor(chart_instance.current_year()));
      chart_instance.animation("off");
      d3.select('#next_btn')
      .attr('class','img_btn_enabled')
      .transition()
      .duration(250)
      .ease(d3.easeCubic)
      .attr('src', 'assets/next.svg');
      d3.select('#prev_btn')
      .attr('class','img_btn_enabled');
    }
    else if (chart_instance.animation() == "off") {
      chart_instance.animation("on"); 
      d3.select('#next_btn')
      .attr('class','img_btn_disabled')
      .transition()
      .duration(250)
      .ease(d3.easeCubic)
      .attr('src', 'assets/next_gold.svg');
      d3.select('#prev_btn')
      .attr('class','img_btn_disabled');
    }
    chart_g.call(chart_instance);
    globals.log_message = { 
      "TimeStamp": new Date().valueOf(),
      "user_id": globals.userID, 
      "Event": "SandBoxEvent",
      "EventType": "toggleAnimate", 
      "Status": chart_instance.animation()
    };
    console.log("SandBoxEvent", globals.log_message);
    appInsights.trackEvent("SandBoxEvent", globals.log_message);

    document.getElementById('sandbox_div').focus();
  }