image description
The above chart adds data dynamically. The variable xdata in the code is a time, and the format is 17:21:11. It can be printed out, and the y-axis can also be printed normally. But now the Y-axis data can be rendered normally, but the x-axis cannot be displayed. The expected effect should be to display the time, but now the accumulated numbers starting from 1 are displayed.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
You first try setting the type of xAxis to
in the options passed to the highcharts constructorcategory;