This is normal. When switching, the QR code box will not appear. I processed the QR code box by giving it a z-index:-1;
Let it be under the menu bar. , is not displayed, which is normal under other circumstances, but when the Chrome browser is opened on a Mac, a flashing problem will occur when switching components. It will appear the moment you click it, and then disappear.
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
The problem has been solved. The reason for this problem is that the rendering mechanism of z-index is different in different browsers (I don’t understand it either, someone else told me). The temporary solution is to use v-show to let qrbox display it when it needs to be displayed, but I would like to know more about how this compatibility problem occurs and how to solve it. . .