[GitHub] [echarts] Ayushsunny commented on issue #15757: Graph tooltips do not show when all input values are null but all will show given at least one valid input

[GitBox]

Ayushsunny commented on issue #15757:
URL: https://github.com/apache/echarts/issues/15757#issuecomment-929820732


   Hey, @htr3n I think we have to put zero instead of null to show when all of 
the values are null(zero).
   
   [see this](https://codepen.io/ayushsunny/pen/ExXrgMP)
   
   ```
   const container = document.getElementById("main");
   const chart = echarts.init(container);
   
   const options = {
     tooltip: {
       trigger: "axis",
       axisPointer: {
         type: "shadow",
         label: {
           show: true,
           overflow: "break"
         }
       }
     },
     xAxis: {
       type: "category",
       data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
     },
     yAxis: [
       {
         type: "value",
       },
     ],
     series: [
       {
         type: "line",
         data: [0, 0, 0, 0, 0, 0, 0],
       }
     ]
   };
   
   chart.setOption(options, true);
   ```
   
   


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