Suppose we have a container container as follows:
Now we need to pop up a div layer in the web page so that the container cannot be operated before closing the pop-up div layer.
Then, we first need to define the div layer of this mask as follows:
The next step is to use js to make the mask layer always display on the screen and the content under the mask layer cannot be manipulated. Click the close button to close the mask layer
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
