Local host in WebGL

Hi, I was following the Unity Networking live training and I wanted to put my game on WebGL. The problem that I face is that I have to use Match Maker because when I try to use LAN Client, I am not able to connect to local host (WebSocket connection to 'ws://localhost:7777/' failed: Error in connection establishment: net::ERR_CONNECTION_REFUSED) is there a workaround for this error or can web games not connect to LAN? Thanks for all the help,