I am the front end of the network. How to write code and see the effect on another screen?

This method needs to be under the same LAN, as if. I told you in detail.

Steps: There is an Internet Information Services (IIS) Manager in the Control Panel-Administrative Tools. Some don't seem to have them and need to be installed (how to install them is very simple). Then open it, and there are application pools and websites on the left.

Right-click Website-Add Website

Fill in the website name casually; 2. Physical strength-choose your front folder (including js, css, img, html. Is the entire document); 3. Select 3.ip address.

Click the website you added to open the interface shown in the above figure, then click the content view below-then right-click the html file you want to see-browse, then put the browsed URL into the "forage URL QR code generator" to generate a QR code, and then scan the QR code.