persistence updates + make Persistence.init async

examples/indexeddb/index.js

@@ -1,24 +1,18 @@
 /* global Y, CodeMirror */
 
-// initialize a shared object. This function call returns a promise!
-Y({
-  db: {
-    name: 'memory'
-  },
+const persistence = new Y.IndexedDB()
+const connector = {
   connector: {
     name: 'websockets-client',
     room: 'codemirror-example'
-  },
-  sourceDir: '/bower_components',
-  share: {
-    codemirror: 'Text' // y.share.codemirror is of type Y.Text
   }
-}).then(function (y) {
-  window.yCodeMirror = y
+}
+// initialize a shared object. This function call returns a promise!
+const y = Y('codemirror-example', connector, persistence)
+window.yCodeMirror = y
 
-  var editor = CodeMirror(document.querySelector('#codeMirrorContainer'), {
-    mode: 'javascript',
-    lineNumbers: true
-  })
-  y.share.codemirror.bindCodeMirror(editor)
+var editor = CodeMirror(document.querySelector('#codeMirrorContainer'), {
+  mode: 'javascript',
+  lineNumbers: true
 })
+y.share.codemirror.bindCodeMirror(editor)