How to allow access outside localhost

Mac users:

1. Go to System Preferences -> Network -> Wi-Fi
2. Copy the IP address below Status (Usually 192.168.1.x)
3. Paste it in your ng serve like: ng serve --host 192.168.1.x

Then you must be able to see your page on other devices through 192.168.1.x:4200.

run command

ng serve --host=0.0.0.0 --disable-host-check

this will disable host check and allow to access from outside(instead of localhost) with IP address

Using ng serve --host 0.0.0.0 will allow you to connect to the ng serve using your ip instead of localhost.

EDIT

In newer versions of the cli, you have to provide your local ip address instead

EDIT 2

In newer versions of the cli (I think v5 and up) you can use 0.0.0.0 as the ip again to host it for anyone on your network to talk to.

As a side note Make sure your connection is set to Public in your OS settings.