[GitHub] wangyx233 opened a new issue #8862: v4.1.0 datazoom 'toFixed of null' error

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

wangyx233 opened a new issue #8862: v4.1.0 datazoom 'toFixed of null' error
URL: https://github.com/apache/incubator-echarts/issues/8862
 
 
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   ### One-line summary [问题简述]
   
   3.8.5版本切换到4.1.0时有报错‘TypeError: Cannot read property 'toFixed' of null’。排查后发现，xAxis的data为[],而datazoom的startValue，endValue为string类型的值时会触发。3.8.5版本则无报错。
   现在是给xAxis的data赋值后，再设置datazoom的startValue和endValue可以避免这个问题。
   
   
   ### Version & Environment [版本及环境]
   + ECharts version [ECharts 版本]: 4.1.0
   + Browser version [浏览器类型和版本]: Chrome 版本 68.0.3440.84（正式版本） （64 位）
   + OS Version [操作系统类型和版本]: macOS High Sierra 10.13.3
   
   
   
   
   
   ### Expected behaviour [期望结果]
   
   
   
   
   ### ECharts option [ECharts配置项]
   <!-- Copy and paste your 'echarts option' here. -->
   <!-- [下方贴你的option，注意不要删掉下方 ```javascript 和 尾部的 ``` 字样。最好是我们能够直接运行的 option。如何得到能运行的 option 参见上方的 guidelines for contributing] -->
   ```javascript
   option = {
       xAxis: {
           type: 'category',
           data: []
       },
       yAxis: {
           type: 'value',
           data: []
       },
       dataZoom: [
           {
               type: 'slider',
               show: true,
               xAxisIndex: [0],
               startValue: '1日',
               endValue: '5日'
           },
       ],
       series: [
           {
               name: 'test',
               type: 'line',
               data: []
           },
       ]
   }
   
   ```
   
   
   
   
   ### Other comments [其他信息]
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   ![image](https://user-images.githubusercontent.com/16773666/44020092-58104d44-9f13-11e8-93a3-0ed75b520133.png)
   对照3.8.5版本的代码，valueWindow->[-1,-1]
   ![image](https://user-images.githubusercontent.com/16773666/44020194-b969208e-9f13-11e8-8e4e-525a004d2a0b.png)
   4.1.0：valueWindow->[null,null] 所以有上述报错。
   ![image](https://user-images.githubusercontent.com/16773666/44020382-4d0207fc-9f14-11e8-8773-35968b683464.png)
   
   
   
   

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