AlexaSkillTut_3.js

const FactsIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'FactsIntent';
    },
    handle(handlerInput) {
        var random = factsList.facts[Math.floor(Math.random() * factsList.facts.length)]; //select a random fact from json file
        var factText = random.text;
        var speakOutput = "Did you know that " + factText;
         
        return handlerInput.responseBuilder
            .speak(speakOutput)
            //.reprompt('add a reprompt if you want to keep the session open for the user to respond')
            .getResponse();
    }
};