fix linting of examples

examples/chat/index.js

@@ -1,5 +1,4 @@
-/* @flow */
-/* global Y */
+/* global Y, chat */
 
 // initialize a shared object. This function call returns a promise!
 Y({
@@ -17,10 +16,10 @@ Y({
 }).then(function (y) {
   window.yChat = y
   // This functions inserts a message at the specified position in the DOM
-  function appendMessage(message, position) { 
+  function appendMessage (message, position) {
     var p = document.createElement('p')
     var uname = document.createElement('span')
-    uname.appendChild(document.createTextNode(message.username + ": "))
+    uname.appendChild(document.createTextNode(message.username + ': '))
     p.appendChild(uname)
     p.appendChild(document.createTextNode(message.message))
     document.querySelector('#chat').insertBefore(p, chat.children[position] || null)
@@ -28,23 +27,22 @@ Y({
   // This function makes sure that only 7 messages exist in the chat history.
   // The rest is deleted
   function cleanupChat () {
-    var len
-    while ((len = y.share.chat.length) > 7) {
-      y.share.chat.delete(0)        
+    if (y.share.chat.length > 7) {
+      y.share.chat.delete(0, y.chat.length - 7)
     }
   }
   // Insert the initial content
   y.share.chat.toArray().forEach(appendMessage)
   cleanupChat()
-  
+
   // whenever content changes, make sure to reflect the changes in the DOM
   y.share.chat.observe(function (event) {
     if (event.type === 'insert') {
-      for (var i = 0; i < event.length; i++) {
+      for (let i = 0; i < event.length; i++) {
         appendMessage(event.values[i], event.index + i)
       }
     } else if (event.type === 'delete') {
-      for (var i = 0; i < event.length; i++) {
+      for (let i = 0; i < event.length; i++) {
         chat.children[event.index].remove()
       }
     }
@@ -54,8 +52,8 @@ Y({
   document.querySelector('#chatform').onsubmit = function (event) {
     // the form is submitted
     var message = {
-      username: this.querySelector("[name=username]").value,
-      message: this.querySelector("[name=message]").value
+      username: this.querySelector('[name=username]').value,
+      message: this.querySelector('[name=message]').value
     }
     if (message.username.length > 0 && message.message.length > 0) {
       if (y.share.chat.length > 6) {
@@ -66,10 +64,10 @@ Y({
       // This will call the observe function (see line 40)
       // and reflect the change in the DOM
       y.share.chat.push([message])
-      this.querySelector("[name=message]").value = ""
+      this.querySelector('[name=message]').value = ''
     }
     // Do not send this form!
     event.preventDefault()
     return false
   }
-})
+})