{
  "state": {
    "expanded": true
  },
  "layout": {
    "style": {
      "padding": 15
    },
    "children": [
      {
        "type": "text",
        "style": {
          "text": "aaa"
        }
      },
      {
        "on-tap": {
          "updateState:": {
            "expanded": "${!state.expanded}"
          }
        },
        "style": {
          "direction": "horizontal",
          "margin-left": "auto",
          "margin-right": -15,
          "height": 24,
          "align-items": "center",
          "corner-radius": 12,
          "background-color": "#10000000",
          "auto-animation": {
            "enabled": true,
            "duration": 0.3
          }
        },
        "children": [
          {
            "type": "image",
            "style": {
              "margin-left": 12,
              "image": "O2O.bundle/arrow",
              "background-color": "green",
              "width": 15,
              "height": 17,
              "content-mode": "scale-aspect-fit"
            }
          },
          {
            "gone": "${!state.expanded}",
            "on-update-disappear": {
              "type": "animation",
              "params": {
                "animations": [
                  {
                    "key-path": "hidden",
                    "from": false
                  },
                  {
                    "key-path": "opacity",
                    "to": 0
                  }
                ]
              }
            },
            "type": "text",
            "style": {
              "margin-left": 5,
              "text": "写评价抢50元红包",
              "font-size": 13,
              "color": "black",
              "alpha": "${state.expanded ? 1 : 0}"
            }
          },
          {
            "gone": "${state.expanded}",
            "type": "text",
            "style": {
              "margin-left": 5,
              "text": "待评价",
              "font-size": 13,
              "color": "black",
              "alpha": 0
            }
          },
          {
            "type": "text",
            "style": {
              "fixed": true,
              "margin-left": "auto",
              "text": "待评价",
              "font-size": 13,
              "color": "black",
              "alpha": "${state.expanded ? 0 : 1}"
            }
          }
        ]
      }
    ]
  }
}