Make label to show if selected date is null configurable

src/components/input/datepicker.vue

@@ -1,8 +1,12 @@
 <template>
 	<div class="datepicker">
 		<a @click.stop="show = !show">
-			show
-			{{ formatDate(date) }}
+			<template v-if="date === null">
+				{{ chooseDateLabel }}
+			</template>
+			<template v-else>
+				{{ formatDate(date) }}
+			</template>
 		</a>
 
 		<transition name="fade">
@@ -127,7 +131,11 @@ export default {
 	props: {
 		value: {
 			validator: prop => prop instanceof Date || prop === null
-		}
+		},
+		chooseDateLabel: {
+			type: String,
+			default: 'Choose a date'
+		},
 	},
 	mounted() {
 		this.date = this.value