Fusion Chart not showing properly in iOS - WKWebView

In iOS, fusion chart was working fine in UIWebView (as shown below sample image from my project).

Now in iOS, UIWebView has been replaced with WKWebVeiw. After replacing the UIWebView to WKWebView, same fusion graph is not showing properly in the WKWebView.

Graph in UIWebView

Graph in WKWebView

Graph is zoomed out.
Fonts are very small.

Fusion Chart Code

 function showChart(dataChart,chartWidht,chartHeight,chartTypeValue){

  FusionCharts.ready(function(){

  var chartVar = dataChart;
  var ctype;

  // Get Chart Type.
  switch (chartTypeValue) {

    case 1:
    ctype = "stackedcolumn2d";
    break;

    case 2:
    ctype = "pie3d";
    break;

    case 3:
    ctype = "column2d";
    break;

    default :
    ctype = "stackedcolumn2d";
    break;

  }

   var ddd = JSON.stringify(chartVar);
   var ddd2 = JSON.parse(ddd);
   var width = chartWidht;
   var height = chartHeight;

   // Height and width variable are not in use.

   var revenueChart = new FusionCharts({

        "type": ctype,      // 1 == stackedcolumn2d 2 == pie3d 3 == column2d
        "renderAt": "chartContainer",
        "width": "100%",
        "height": "100%",
        "dataFormat": "json",
        "dataSource": ddd2

  });

    revenueChart.render();

 })
 }

System Configuration

Swift 4.x
iOS 12.x

fusioncharts / fusioncharts-jquery-plugin

Fusion Chart not showing properly in iOS - WKWebView #24

Graph in UIWebView

Graph in WKWebView

Fusion Chart Code

System Configuration