Created
February 23, 2012 01:46
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Dart IndexedDB sample
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| <html> | |
| <head> | |
| <title>indexeddb</title> | |
| </head> | |
| <body> | |
| <h1>indexeddb</h1> | |
| <button id="add">Add Item</button> | |
| <ul id="items"></ul> | |
| <script type="text/javascript" src="indexeddb.dart.js"></script> | |
| <!--<script type="application/dart" src="indexeddb.dart"></script>--> | |
| <!--<script src="http://dart.googlecode.com/svn/branches/bleeding_edge/dart/client/dart.js"></script>--> | |
| </body> | |
| </html> |
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| #import('dart:dom', prefix:'dom'); | |
| #import('dart:html'); | |
| String VERSION = "1"; | |
| String TODOS_STORE = 'todos'; | |
| initDb(db) { | |
| if (VERSION != db.version) { | |
| dom.IDBVersionChangeRequest versionChange = db.setVersion(VERSION); | |
| versionChange.addEventListener('success', (e) { | |
| print("Set version"); | |
| db.createObjectStore(TODOS_STORE); | |
| displayItems(db); | |
| }); | |
| versionChange.addEventListener('error', (e) { | |
| print("Could not set version: $e"); | |
| }); | |
| } else { | |
| print("DB is at version ${db.version}"); | |
| displayItems(db); | |
| } | |
| } | |
| displayItems(dom.IDBDatabase db) { | |
| dom.IDBTransaction txn = db.transaction(TODOS_STORE, dom.IDBTransaction.READ_ONLY); | |
| dom.IDBObjectStore objectStore = txn.objectStore(TODOS_STORE); | |
| dom.IDBRequest cursorRequest = objectStore.openCursor(); | |
| cursorRequest.addEventListener("success", (e) { | |
| var cursor = e.target.result; | |
| if (cursor != null) { | |
| renderItem(cursor.value); | |
| cursor.continueFunction(); | |
| } | |
| }); | |
| cursorRequest.addEventListener('error', (e) { | |
| print("Could not open cursor: $e"); | |
| }); | |
| } | |
| renderItem(value) { | |
| var ul = document.query('#items'); | |
| var li = new Element.tag("li"); | |
| li.text = value; | |
| ul.elements.add(li); | |
| } | |
| addItem(db) { | |
| var msg = "Stuff ${new Date.now().value}"; | |
| dom.IDBTransaction txn = db.transaction(TODOS_STORE, dom.IDBTransaction.READ_WRITE); | |
| dom.IDBObjectStore objectStore = txn.objectStore(TODOS_STORE); | |
| dom.IDBRequest addRequest = objectStore.put(msg, new Date.now().value); | |
| addRequest.addEventListener("success", (e) { | |
| renderItem(msg); | |
| }); | |
| addRequest.addEventListener("error", (e) => print("Could not add: $e")); | |
| } | |
| registerButtons(db) { | |
| var add = document.query("#add"); | |
| add.on.click.add((e) { | |
| addItem(db); | |
| }); | |
| } | |
| // Chrome only for now, see bug http://code.google.com/p/chromium/issues/detail?id=108223 | |
| void main() { | |
| dom.IDBRequest request = dom.window.webkitIndexedDB.open('todo'); | |
| request.addEventListener('success', (e) { | |
| print("Opened DB"); | |
| dom.IDBDatabase db = e.target.result; | |
| // the following is Chrome only for now :( | |
| initDb(db); | |
| registerButtons(db); | |
| }); | |
| request.addEventListener('error', (e) { | |
| print('Could not open db: $e'); | |
| }); | |
| } |
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This will fail on the second reload of the page. See bug http://code.google.com/p/dart/issues/detail?id=1814