How to correctly add a square grid inside a polygon using turfjs?

Question

So i'm currently playing around with turfjs. And i'm trying to add a squaregrid inside a polygon.

So here's the code

var triangleCoords = [
  { lat: 25.774, lng: -80.19 },
  { lat: 18.466, lng: -66.118 },
  { lat: 32.321, lng: -64.757 },
  { lat: 25.774, lng: -80.19 }
];

// Construct the polygon.
var bermudaTriangle = new google.maps.Polygon({
  paths: triangleCoords,
  strokeColor: "#FF0000",
  strokeOpacity: 0.8,
  strokeWeight: 2,
  fillColor: "#FF0000",
  fillOpacity: 0.35
});
bermudaTriangle.setMap(map);

const geoJSON = {
  type: 'Polygon',
  coordinates: []
};

// convert to bermudaTriangle path to geojson
for (let point of bermudaTriangle.getPath().getArray()) {
  geoJSON.coordinates.push([point.lat(), point.lng()]);
}

const feature = turf.feature(geoJSON);

const bbox = turf.bbox(feature);

// ERROR: this one's showing Infinity values
console.table(bbox);
const grid = turf.squareGrid(bbox, 50, {
  units: "miles",
  mask: feature
});

map.data.addGeoJson(grid);

and looking at the console, it shows Infinity values for bbox as commented on the code.

I've added a link for the code https://codepen.io/chan-dev/pen/yrdRoM

Answer 1

geoJSON is not a valid GeoJSON object for Polygon in the provided example, that's the reason why turf.bbox returns invalid result. GeoJSON for polygon could be constructed via turf.polygon like this:

var triangleCoords = [
  { lat: 25.774, lng: -80.19 },
  { lat: 18.466, lng: -66.118 },
  { lat: 32.321, lng: -64.757 },
  { lat: 25.774, lng: -80.19 }
];

var data = triangleCoords.map(coord => {
  return [coord.lng, coord.lat];
});
var geojson = turf.polygon([data]);    

and bounding box calculated like this:

const bbox = turf.bbox(geojson);

Modified CodePen