Spin up a Live-Server pointing at the page you're working on. The page automatically refreshes as you make changes.
Open an HTML file and choose “Start Local Web Server” from the command palette, or press
⇧⌘E. If the active tab isn't an HTML file, the web server will point to the root directory of your project.
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.