DataPackageView.GetTextAsync | getTextAsync methods

var shareOperation = eventObject.detail.shareOperation;
if (shareOperation.data.contains(Windows.ApplicationModel.DataTransfer.StandardDataFormats.text)) {
    shareOperation.data.getTextAsync().done(function (text) {
            // To output the text using this example, 
            // you need a div tag with an id of "output" in your HTML file.
            document.getElementById("output").innerText = text;
        }, function (e) {
            displayError("Error retrieving Text format: " + e);
        }
    });
}