Center a map in d3 given a geoJSON object

Question

Currently in d3 if you have a geoJSON object that you are going to draw you have to scale it and translate it in order to get it to the size that one wants and translate it

Answer 1

With d3 v4 or v5 its getting way easier!

var projection = d3.geoMercator().fitSize([width, height], geojson);
var path = d3.geoPath().projection(projection);

and finally

g.selectAll('path')
  .data(geojson.features)
  .enter()
  .append('path')
  .attr('d', path)
  .style("fill", "red")
  .style("stroke-width", "1")
  .style("stroke", "black");

Enjoy, Cheers