Quartic Authalic with D3v4

<!DOCTYPE html>
<meta charset="utf-8">
<style>

body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
svg { width:100%; height: 100% }
  
.stroke {
  fill: none;
  stroke: #000;
  stroke-width: 2px;
}

.graticule {
  fill: none;
  stroke: #777;
  stroke-width: .5px;
  stroke-opacity: .5;
}

.land {
  fill: #222;
  stroke: #fff;
  stroke-width: 0.5px;
}

</style>
<body>
<script src="https://unpkg.com/d3@4"></script>
<script src="https://unpkg.com/d3-geo-projection@2"></script>
<script src="https://unpkg.com/topojson-client@3"></script>
<script>

var width = 900;
var height = 500;
    
var svg = d3.select("body").append("svg");
  
//Quartic Authalic: https://bl.ocks.org/mbostock/4463175
var projection = d3.geoHammer()
    .coefficient(Infinity)
    .scale(150)
    .translate([width / 2, height / 2])
    .precision(.1);
  
var path = d3.geoPath().projection(projection);
  
var graticule = d3.geoGraticule();

var defs = svg.append("defs");

defs.append("path")
    .datum({type: "Sphere"})
    .attr("id", "sphere")
    .attr("d", path);
  
svg.append("use")
    .attr("class", "stroke")
    .attr("xlink:href", "#sphere");
  
/*
defs.append("clipPath")
    .attr("id", "clip")
  .append("use")
    .attr("xlink:href", "#sphere");

svg.append("use")
    .attr("class", "fill")
    .attr("xlink:href", "#sphere");
    
svg.append("path")
    .datum(graticule)
    .attr("class", "graticule")
    .attr("clip-path", "url(#clip)")
    .attr("d", path);    
*/
  
svg.append("path")
    .datum(graticule)
    .attr("class", "graticule")
    .attr("d", path);

d3.json("https://unpkg.com/world-atlas@1/world/50m.json", function(error, world) {
  if (error) throw error;
   
    svg.selectAll("path")
       .data(topojson.feature(world, world.objects.countries).features)
       .enter().append("path")
       .attr("class", "land")
       .attr("d", path);
  
});
</script>

https://unpkg.com/d3@4

https://unpkg.com/d3-geo-projection@2

https://unpkg.com/topojson-client@3