import “format”; import “format-utc”; import “time”;

var d3_time_formatIso = d3.time.format.utc(“%Y-%m-%dT%H:%M:%S.%LZ”);

d3.time.format.iso = Date.prototype.toISOString && +new Date(“2000-01-01T00:00:00.000Z”)

? d3_time_formatIsoNative
: d3_time_formatIso;

function d3_time_formatIsoNative(date) {

return date.toISOString();

}

d3_time_formatIsoNative.parse = function(string) {

var date = new Date(string);
return isNaN(date) ? null : date;

};

d3_time_formatIsoNative.toString = d3_time_formatIso.toString;