feature: vor und nachteile

praesentation/node_modules/d3-time/src/month.js

@@ -0,0 +1,27 @@
+import {timeInterval} from "./interval.js";
+
+export const timeMonth = timeInterval((date) => {
+  date.setDate(1);
+  date.setHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setMonth(date.getMonth() + step);
+}, (start, end) => {
+  return end.getMonth() - start.getMonth() + (end.getFullYear() - start.getFullYear()) * 12;
+}, (date) => {
+  return date.getMonth();
+});
+
+export const timeMonths = timeMonth.range;
+
+export const utcMonth = timeInterval((date) => {
+  date.setUTCDate(1);
+  date.setUTCHours(0, 0, 0, 0);
+}, (date, step) => {
+  date.setUTCMonth(date.getUTCMonth() + step);
+}, (start, end) => {
+  return end.getUTCMonth() - start.getUTCMonth() + (end.getUTCFullYear() - start.getUTCFullYear()) * 12;
+}, (date) => {
+  return date.getUTCMonth();
+});
+
+export const utcMonths = utcMonth.range;