category choose might work in timer

src/App.vue

@@ -39,6 +39,7 @@
 		<section id="timer">
 			<Status ref="statusRef"/>
 			<Timer 
+				v-if="categories.length > 0"
 				@loggedTime="refreshPage"
 				:categories="categories"
 				:instruments="instruments"

src/components/timer.vue

@@ -4,7 +4,7 @@
 	import { getHours, getMinutes, createTimeObj, getAccumulatedSeconds, formatSeconds } from '../libs/time.js'
 
 	export default {
-		props: ['categories', 'currentWorkingCategoryID', 'instruments'],
+		props: ['categories', 'currentWorkingCategory', 'instruments'],
 		data() {
 			return {
 				running: false,
@@ -146,20 +146,20 @@
 					return false
 				}
 			},
-			handleCategoryChange(newValue){
-				this.practice_category_id = newValue
+			handleCategoryChange(chosenCategory){
+				this.practice_category_id = chosenCategory.id
 			}
 		},
 		mounted() {
-			this.practice_category_id = this.currentWorkingCategoryID
+			this.practice_category_id = this.currentWorkingCategory.id
 			this.totalSeconds = parseInt(window.localStorage.getItem('lastTotalSeconds'))
 			this.setManualTime(this.totalSeconds)
 			this.savedPreviousSeconds = this.totalSeconds
 			window.onbeforeunload = this.confirmClose
 		},
 		watch: {
-			currentWorkingCategoryID(newValue){
-				this.practice_category_id = newValue
+			currentWorkingCategory(chosenCategory){
+				this.practice_category_id = chosenCategory.id
 			}
 		}
 	}
@@ -187,8 +187,7 @@
 		<label>Practice Category</label>
 		<CategoryChooser
 			@update="handleCategoryChange"
-			v-if="categories.length > 0" 
-			:currentWorkingCategoryID="practice_category_id"
+			:currentWorkingCategory="currentWorkingCategory"
 			:instruments="instruments"
 			:categories="categories" />
 		<input type="Submit"/>