[GitHub] [echarts] MalteSchledjewski opened a new issue, #17894: step start/end seems to be swapped for category axis [Bug]

[GitBox <gi...@apache.org>]

MalteSchledjewski opened a new issue, #17894:
URL: https://github.com/apache/echarts/issues/17894

   ### Version
   
   5.4.0 and 5.5.0-dev.20221109
   
   ### Link to Minimal Reproduction
   
   https://jsfiddle.net/mr5vxn9L/
   
   ### Steps to Reproduce
   
   
   
   ```
     option = {
       tooltip: {
         trigger: "axis",
         position: function (pt) {
           return [pt[0], "10%"];
         },
         axisPointer: {
           axis: "x"
         }
       },
       legend: {
         type: "scroll"
       },
       title: {
         text: "Stream Values",
       },
       toolbox: {
         feature: {
           dataZoom: {
             yAxisIndex: "none",
           },
           restore: {},
           saveAsImage: {},
         },
       },
       xAxis: {
         type: "time",
         boundaryGap: false,
       },
       yAxis: [
         {
           type: "value",
           boundaryGap: [0, "5%"],
         },
         {
           type: "category",
           data: ["false", "true"],
           name: "boolean",
         },
       ],
       series: [
         {
           name: "value end",
           type: "line",
           symbol: "emptyCircle",
           step: "end",
           data: [
             [1, 10.0],
             [2, 2.0],
             [3, 10.0],
           ],
         },
         {
           name: "value start",
           type: "line",
           symbol: "emptyCircle",
           step: "start",
           data: [
             [1, 10.0],
             [2, 2.0],
             [3, 10.0],
           ],
         },
   
         {
           name: "category end",
           type: "line",
           symbol: "emptyCircle",
           step: "end",
           yAxisIndex: 1,
           data: [
             [4, "true"],
             [5, "false"],
             [6, "true"],
           ],
         },
   
         {
           name: "category start",
           type: "line",
           symbol: "emptyCircle",
           step: "start",
           yAxisIndex: 1,
           data: [
             [4, "true"],
             [5, "false"],
             [6, "true"],
           ],
         },
       ],
     };
   ```
   
   No interaction is required.
   
   ### Current Behavior
   
   `step: 'start'`/`step: 'end'` for a `category` axis are swapped in regards to how they behave on a `value` axis.
   
   For the series "category start" the steps are made at the end and for "category end" they are made at the beginning. 
   
   ### Expected Behavior
   
   `step: 'start'`/`step: 'end'` for a `category` axis should behave like for a `value` axis.
   
   For the series "category start" the steps should be made at the start and for "category end" they should be made at the end. 
   
   ### Environment
   
   ```markdown
   - OS: Windows 11
   - Browser: Chrome 107.0.5304.88
   ```
   
   
   ### Any additional comments?
   
   _No response_


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