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What does window.onload mean?
Why not use it directly: box=document.getElementById("box")
This should also be used globally, right?
The function of window.onload is to refresh the page. The variables declared in box=document.getElementById("box") are global variables
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The function of window.onload is to refresh the page. The variables declared in box=document.getElementById("box") are global variables