Amazon Comprehend code snippet

app.js

this.sentimentAnalysis(plainText, message.timetoken)
.then(function(id, sentiment) {
    var messageInfoSpan = $('span[data-identifier="' + id + '"]');
    var messageDiv = $('div[data-identifier="' + id + '"]');

    if (sentiment.Sentiment &&
        sentiment.SentimentScore &&
        sentiment.SentimentScore.Negative &&
        sentiment.SentimentScore.Positive
    ) {
        messageDiv.removeClass('neutral');
        messageDiv.addClass(sentiment.Sentiment);

        var neg = (sentiment.SentimentScore.Negative * 100).toFixed(2);
        var pos = (sentiment.SentimentScore.Positive * 100).toFixed(2);

        messageInfoSpan.text('+' + pos + '%   -' + neg + '%');
    }
});