Teacher, I wrote the carousel image based on your code. Why did I get the error "Cannot set property 'onclick' of null"" when binding the click event of the carousel box?
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Is the JS executed after the browser loads the button node first? Try loading the js at the bottom
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
