compass.js

function getDirection(magneticHeading) {
      var textDirection;
      if (typeof magneticHeading !== "number") {
        textDirection = '';
      } else if (magneticHeading >= 337.5 || (magneticHeading >= 0 &&  magneticHeading <= 22.5)) {
        textDirection =  'N';
      } else if (magneticHeading >= 22.5 && magneticHeading <= 67.5) {
        textDirection =  'NE';
      } else if (magneticHeading >= 67.5 && magneticHeading <= 112.5) {
        textDirection =  'E';
      } else if (magneticHeading >= 112.5 && magneticHeading <= 157.5) {
        textDirection =  'SE';
      } else if (magneticHeading >= 157.5 && magneticHeading <= 202.5) {
        textDirection =  'S';
      } else if (magneticHeading >= 202.5 && magneticHeading <= 247.5) {
        textDirection =  'SW';
      } else if (magneticHeading >= 247.5 && magneticHeading <= 292.5) {
        textDirection =  'W';
      } else if (magneticHeading >= 292.5 && magneticHeading <= 337.5) {
        textDirection =  'NW';
      } else {
        textDirection =  textDirection;
      }
      return textDirection;
    }