vanilla-es6: Replace let with const where possible

examples/vanilla-es6/src/controller.js

@@ -177,7 +177,7 @@ export default class Controller {
 	 * @param {boolean|undefined} force  forces a re-painting of todo items.
 	 */
 	_filter(force) {
-		let active = this._activeRoute;
+		const active = this._activeRoute;
 		const activeRoute = active.charAt(0).toUpperCase() + active.substr(1);
 
 		// Update the elements on the page, which change with each completed todo

examples/vanilla-es6/src/helpers.js

@@ -19,7 +19,7 @@ export function $on(target, type, callback, useCapture) {
 // Attach a handler to event for all elements that match the selector,
 // now or in the future, based on a root element
 export function $delegate(target, selector, type, handler) {
-	let dispatchEvent = event => {
+	const dispatchEvent = event => {
 		const targetElement = event.target;
 		const potentialElements = qsa(selector, target);
 		const hasMatch = Array.from(potentialElements).includes(targetElement);

examples/vanilla-es6/src/model.js

@@ -17,7 +17,7 @@ export default class Model {
 	create(title, callback){
 		title = title || '';
 
-		let newItem = {
+		const newItem = {
 			title: title.trim(),
 			completed: false
 		};
@@ -88,7 +88,7 @@ export default class Model {
 	 * Returns a count of all todos
 	 */
 	getCount(callback){
-		let todos = {
+		const todos = {
 			active: 0,
 			completed: 0,
 			total: 0

examples/vanilla-es6/src/store.js

@@ -39,7 +39,7 @@ export default class Store {
 		 * })
 	 */
 	find(query, callback){
-		let todos = JSON.parse(localStorage[this._dbName]).todos;
+		const todos = JSON.parse(localStorage[this._dbName]).todos;
 
 		callback.call(this, todos.filter(todo => {
 			for (let q in query) {
@@ -72,7 +72,7 @@ export default class Store {
 	 */
 	save(updateData, callback, id){
 		const data = JSON.parse(localStorage[this._dbName]);
-		let todos = data.todos;
+		const todos = data.todos;
 		const len = todos.length;
 
 		// If an ID was actually given, find the item and update each property
@@ -112,7 +112,7 @@ export default class Store {
 	 */
 	remove(id, callback){
 		const data = JSON.parse(localStorage[this._dbName]);
-		let todos = data.todos;
+		const todos = data.todos;
 		const len = todos.length;
 
 		for (let i = 0; i < todos.length; i++) {

examples/vanilla-es6/src/template.js

@@ -10,8 +10,8 @@ const htmlEscapes = {
 const reUnescapedHtml = /[&<>"'`]/g;
 const reHasUnescapedHtml = new RegExp(reUnescapedHtml.source);
 
-let escape = str => (str && reHasUnescapedHtml.test(str)) ? str.replace(reUnescapedHtml, escapeHtmlChar) : str;
-let escapeHtmlChar = chr => htmlEscapes[chr];
+const escape = str => (str && reHasUnescapedHtml.test(str)) ? str.replace(reUnescapedHtml, escapeHtmlChar) : str;
+const escapeHtmlChar = chr => htmlEscapes[chr];
 
 export default class Template {
 	constructor() {
@@ -44,10 +44,10 @@ export default class Template {
 		 * })
 	 */
 	show(data){
-		let view = data.map(d => {
-			let template = this.defaultTemplate;
-			let completed = d.completed ? 'completed' : '';
-			let checked = d.completed ? 'checked' : '';
+		const view = data.map(d => {
+			const template = this.defaultTemplate;
+			const completed = d.completed ? 'completed' : '';
+			const checked = d.completed ? 'checked' : '';
 
 			return this.defaultTemplate
 				.replace('{{id}}', d.id)
@@ -66,7 +66,7 @@ export default class Template {
 	 * @returns {string} String containing the count
 	 */
 	itemCounter(activeTodos){
-		let plural = activeTodos === 1 ? '' : 's';
+		const plural = activeTodos === 1 ? '' : 's';
 		return `<strong>${activeTodos}</strong> item${plural} left`;
 	}
 

examples/vanilla-es6/src/view.js

 import {qs, qsa, $on, $parent, $delegate} from './helpers';
 
-let _itemId = element => parseInt($parent(element, 'li').dataset.id, 10);
+const _itemId = element => parseInt($parent(element, 'li').dataset.id, 10);
 
-let _setFilter = currentPage => {
+const _setFilter = currentPage => {
 	qs('.filters .selected').className = '';
 	qs(`.filters [href="#/${currentPage}"]`).className = 'selected';
 };
 
-let _elementComplete = (id, completed) => {
+const _elementComplete = (id, completed) => {
 	const listItem = qs(`[data-id="${id}"]`);
 
 	if (!listItem) {
@@ -20,7 +20,7 @@ let _elementComplete = (id, completed) => {
 	qs('input', listItem).checked = completed;
 };
 
-let _editItem = (id, title) => {
+const _editItem = (id, title) => {
 	const listItem = qs(`[data-id="${id}"]`);
 
 	if (!listItem) {
@@ -29,7 +29,7 @@ let _editItem = (id, title) => {
 
 	listItem.className += ' editing';
 
-	let input = document.createElement('input');
+	const input = document.createElement('input');
 	input.className = 'edit';
 
 	listItem.appendChild(input);
@@ -109,7 +109,7 @@ export default class View {
 	}
 
 	_bindItemEditDone(handler) {
-		let self = this;
+		const self = this;
 
 		$delegate(self.$todoList, 'li .edit', 'blur', function () {
 			if (!this.dataset.iscanceled) {
@@ -129,11 +129,11 @@ export default class View {
 	}
 
 	_bindItemEditCancel(handler) {
-		let self = this;
+		const self = this;
 
 		$delegate(self.$todoList, 'li .edit', 'keyup', function (event) {
 			if (event.keyCode === self.ESCAPE_KEY) {
-				let id = _itemId(this);
+				const id = _itemId(this);
 				this.dataset.iscanceled = true;
 				this.blur();