Reply by Flex Message

index.js

reply(event.replyToken, {
  "type": "flex",
  "altText": "Flex Message",
  "contents": {
    "type": "bubble",
    "direction": "ltr",
    "hero": {
      "type": "image",
      "url": "https://4.bp.blogspot.com/-j0d1WQiF-iU/XGxYdwp9C8I/AAAAAAAAUME/8IbomE8q9TUd3tUxWd5yV7-jz9YPVcxXACLcBGAs/s1600/Ucl19.jpg",
      "size": "full",
      "aspectRatio": "1.51:1",
      "aspectMode": "fit"
    },
    "body": {
      "type": "box",
      "layout": "vertical",
      "contents": [
        {
          "type": "text",
          "text": "กรุณายืนยันตัวตนด้วยการอัพโหลดรูปที่มีโลโกทีมที่คุณชื่นชอบ",
          "align": "start",
          "wrap": true
        }
      ]
    },
    "footer": {
      "type": "box",
      "layout": "horizontal",
      "contents": [
        {
          "type": "button",
          "action": {
            "type": "uri",
            "label": "LIFF",
            "uri": "line://app/1575372380-jdaY42Xb"
          },
          "style": "primary"
        }
      ]
    }
  }
});