<view>
 <p>{{helloWord}}</p>
</view>

var json = {
 data:{
  "helloWord" : "hello world"
 }
};

page(json)

var json = {
 data:{
  "helloWorld":""
 },
 //监听页面加载
 onLoad:function(){
  var that = this;
  that.setData({
   "helloWorld":"hello world"
  })
 }
};
page(json)

var json = {
 data:{},
 //监听页面加载
 onLoad:function(){
  var that = this;
  that.setData({
   "helloWorld":"hello world"
  })
 }
};
page(json)

<view>
 <view wx:for="{{users}}" wx:for-item="{{item}}">
  <view wx:for="{{item}}" wx:for-index="{{key}}" wx:for-item="{{val}}">
    <p>{{key}}=>{{val}}</p>
  </view>
 </view>
 <view id="nameDemo">
  <p>name : {{users[0].name}}</p>
 </view>
 <view>
  <button bindtap="clickFunc">我是测试按钮</button>
 </view>
</view>

var json={
 data:{},
 //监听页面显示
 onShow:function(){
  vat that = this;
  that.setData({
   users:[
    {
     "name":"name1",
     "age":100
    },
    {
     "name":"name2",
     "age":101
    }
   ]
  });
 }
};
page(json);

var json = {
 data:{},
 //监听页面显示
 onShow:function(){
  vat that = this;
  that.setData({
   users:[
    {
     "name":"name1",
     "age":100
    },
    {
     "name":"name2",
     "age":101
    }
   ]
  });
 },
 clickFunc:function(event){
  vat that = this;
  var dataJson = {};

  dataJson["users[0].name"] = "我是谁"; 
  that.setData(dataJson);
 }
}

 { 
  "type": "tap", 
  "timeStamp": 1252, 
  "target": { 
   "id": "tapTest", 
   "offsetLeft": 0, 
   "offsetTop": 0
  }, 
  "currentTarget": { 
   "id": "tapTest", 
   "offsetLeft": 0, 
   "offsetTop": 0, 
   "dataset": { 
   "hi": "MINA" 
   } 
  }, 
  "touches": [{ 
   "pageX": 30, 
   "pageY": 12, 
   "clientX": 30, 
   "clientY": 12, 
   "screenX": 112, 
   "screenY": 151 
  }], 
  "detail": { 
   "x": 30, 
   "y": 12 
  } 
 }