echarts鼠標滑過陰影框內的內容重置

tooltip: {
                        trigger: 'axis',
                        // formatter:'{b0}<br />{a0}: {c0}<br />{a1}: {c1}<br />{a2}: {c2}%<br />{a3}: {c3}<br />{a4}: {c4}'
                        formatter: function(params) {
                            var result='<div><p>'+params[0].name.split("[")[0]+'</p></div>'
                           for(var i=0;i<params.length;i++){
                                if(i==2){
                                    result+=params[i].marker+' '+params[i].seriesName+':'+params[i].data+'%'+'<br>'
                                }else{
                                    result+=params[i].marker+' '+params[i].seriesName+':'+params[i].data+'<br>'
                                }
                           }
                            return result;
                        }
                    },