Why is my MUI X Line chart only showing the last value when hovering on any of the charts marker points

Question

With the help of code can you tell me Why is my MUI X Line chart only showing the last value when hovering on any of the charts marker points

Answer 1

If your MUI X Line Chart is only showing the last value when hovering over any marker point, possible reasons and fixes include:  

1. Tooltip Configuration Issue 

Ensure the `tooltip` mode is correctly set. Use "nearest" or "index" depending on the behavior you want.  

tooltip: {

  mode: "index", // Show tooltips for all data points at the same x-value

  intersect: false,

}

2. Incorrect Data Formatting

Make sure your data is structured properly:  

const data = [

  { x: 'Jan', y: 10 },

  { x: 'Feb', y: 20 },

  { x: 'Mar', y: 30 },

];

3. Missing `xKey` and `yKey` in Dataset 

If using `LineChart`, specify the correct keys:  

<LineChart

  xAxis={[{ dataKey: 'month' }]}

  series={[{ dataKey: 'value', label: 'Sales' }]}

/>

4. Duplicate X-Axis Values  

Ensure `xAxis` values are unique; duplicates can cause unexpected behavior.  

5. Library or Version Issue 

Try updating MUI X:  

npm update @mui/x-charts