You are talking about javascript, right? You have confused me. Think carefully about what this has to do with java. If your js does not pop up, first check whether the js reports an error, then check whether the return value is correct, and troubleshoot step by step.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
You are talking about javascript, right? You have confused me. Think carefully about what this has to do with java. If your js does not pop up, first check whether the js reports an error, then check whether the return value is correct, and troubleshoot step by step.