Polyfill getTotalLength support for SVG circles on iOS

polyfill.js

/**
 * Polyfill SVG path support for iOS
 */
SVGCircleElement.prototype.getTotalLength = function() {
  let width = this.parentNode.clientWidth,  // Get the parent node width (trying to get the current node width returns 0)
      radius = width / 2,                   // Get the radius by dividing by 2
      length = 2 * Math.PI * radius;        // Get the circumference from 2πr
  
  // Return the calculated value
  return length;
}