Read sharepoint list data using javascript managed metadata column

Read sharepoint list data using javascript managed metadata column

<script type="text/javascript" src="//ajax.aspnetcdn.com/ajax/4.0/1/MicrosoftAjax.js"></script>
<script type="text/javascript" src="jquery-1.9.1.js"></script>
<script type="text/javascript" src="_layouts/15/sp.runtime.js"></script>
<script type="text/javascript" src="_layouts/15/sp.js"></script>

<script type="text/javascript">

var siteUrl = '/';

function createListItem() {
var clientContext = new SP.ClientContext(siteUrl);
var oList = clientContext.get_web().get_lists().getByTitle('Mylist');

var itemCreateInfo = new SP.ListItemCreationInformation();
this.oListItem = oList.addItem(itemCreateInfo);

oListItem.set_item('Title', 'Test');

oListItem.update();

clientContext.load(oListItem);

clientContext.executeQueryAsync(Function.createDelegate(this, this.onCreateSucceeded), Function.createDelegate(this, this.onCreateFailed));
}

function onCreateSucceeded() {

alert('Item created: ' + oListItem.get_id());
}

function onCreateFailed(sender, args) {

alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
}

function retrieveListItems() {
var clientContext = new SP.ClientContext(siteUrl);
var oList = clientContext.get_web().get_lists().getByTitle('MyList');

var camlQuery = new SP.CamlQuery();

this.collListItem = oList.getItems(camlQuery);

clientContext.load(collListItem);

clientContext.executeQueryAsync(Function.createDelegate(this, this.onRetrieveySucceeded), Function.createDelegate(this, this.onRetrieveFailed));

}

function onRetrieveySucceeded(sender, args) {

var listItemInfo = '';

var listItemEnumerator = collListItem.getEnumerator();

while (listItemEnumerator.moveNext()) {
var oListItem = listItemEnumerator.get_current();
//listItemInfo += '\nTitle: ' + oListItem.get_item('Title') ;
listItemInfo += '\nTitle: ' + oListItem.get_item('ManagedMetaData')["Label"];
}

alert(listItemInfo.toString());
}

function onRetrieveFailed(sender, args) {

alert('Request failed. ' + args.get_message() + '\n' + args.get_stackTrace());
}

</script>

<input type="button" id="btnGet" onclick="retrieveListItems(); return false;" value = "Get Item" />

<input type="button" id="btnAdd" onclick="createListItem(); return false;" value = "Add Item" />