Ovilia commented on issue #9830: The returned value of pieselectchange missing attribute 'seriesId' URL: https://github.com/apache/incubator-echarts/issues/9830#issuecomment-469147315 Test example: ```js var chart = echarts.init(document.getElementById('main'), null, { renderer: 'svg' }); var option = { title : { text: '某站点用户访问来源', subtext: '纯属虚构', x:'center' }, tooltip : { trigger: 'item', formatter: "{a} <br/>{b} : {c} ({d}%)" }, legend: { orient: 'vertical', left: 'left', data: ['直接访问','邮件营销','联盟广告','视频广告','搜索引擎'] }, series : [ { id: 'aaa', name: '访问来源', type: 'pie', radius : '55%', center: ['50%', '60%'], selectedMode: 'single', data:[ {value:335, name:'直接访问'}, {value:310, name:'邮件营销'}, {value:234, name:'联盟广告'}, {value:135, name:'视频广告'}, {value:1548, name:'搜索引擎'} ], itemStyle: { emphasis: { shadowBlur: 10, shadowOffsetX: 0, shadowColor: 'rgba(0, 0, 0, 0.5)' } } } ] }; chart.setOption(option, true); chart.on('pieselectchanged', data => { console.log(data); }); ```
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