feature: vor und nachteile

praesentation/node_modules/dayjs/esm/plugin/isYesterday/index.d.ts

@@ -0,0 +1,10 @@
+import { PluginFunc } from 'dayjs/esm'
+
+declare const plugin: PluginFunc
+export = plugin
+
+declare module 'dayjs/esm' {
+  interface Dayjs {
+    isYesterday(): boolean
+  }
+}

praesentation/node_modules/dayjs/esm/plugin/isYesterday/index.js

@@ -0,0 +1,9 @@
+export default (function (o, c, d) {
+  var proto = c.prototype;
+
+  proto.isYesterday = function () {
+    var comparisonTemplate = 'YYYY-MM-DD';
+    var yesterday = d().subtract(1, 'day');
+    return this.format(comparisonTemplate) === yesterday.format(comparisonTemplate);
+  };
+});