echart tooltip issue (mouse and display all put up display when a)

Look at the effect

 

As long as two ways to modify echat option inside tooltip properties can

 The first:

        tooltip : {
            show: true,
             trigger: 'item'
//            trigger: 'axis',
//            axisPointer: {
//                type: 'cross',
//                label: {
//                    backgroundColor: '#6a7985'
//                }
//            }
        },

The second is to remove comments

 

In fact, view documents, we know that works is the trigger