umutcanbolat opened a new issue #10700: add startValue and endValue parameters in zoom event triggered by slider URL: https://github.com/apache/incubator-echarts/issues/10700 ### What problem does this feature solve? When user uses slider to zoom the chart, the event triggered does not have parameters `startValue` and `endValue`. It only has `start` and `end` percentage values. ### What does the proposed API look like? ### Version 4.2.1 ### Reproduction link https://ecomfe.github.io/echarts-examples/public/editor.html?c=doc-example/getting-started ### Steps to reproduce - Please copy the following code into input on the left side. ```javascript option = { title: { text: 'ECharts 入门示例' }, tooltip: {}, legend: { data:['销量'] }, xAxis: { data: ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"] }, yAxis: {}, series: [{ name: '销量', type: 'line', data: [5, 20, 36, 10, 10, 20] }], dataZoom: [ { type: 'slider', show: true, realtime: false }, ] }; myChart.on('dataZoom', function (params) { console.log(params); // should return exact values, but returns undefined console.log(params.startValue); console.log(params.endValue); }); ``` - Then try to zoom the chart and have a look at console. ### What is expected? As described in the [docs](https://echarts.apache.org/en/api.html#events.datazoom), datazoom event includes `startValue` and `endValue` in the payload if the event is triggered by using toolbox. But I think the datazoom event (triggered by the slider) should also take parameters `startValue` and `endValue` besides `start` and `end` percentage parameters. ### What is actually happening? `startValue` and `endValue` parameters are not included in the payload of the event. Thank you. <!-- This issue is generated by echarts-issue-helper. DO NOT REMOVE --> <!-- This issue is in English. DO NOT REMOVE -->
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