This is really obscure, but maybe it will help someone here.
With the open-sourcing of Lightning Web Components on May 29, 2019, I was really excited to dig in! From Christophe Coenraets Salesforce's blog post, I eagerly clicked the link to the LWC website only to be met with an error in my browser.
The site was fine though. I saw other colleagues access it in the office. And I could ping it with a valid response
from the server. I noted that the LWC site used a
.dev domain extension and immediately suspected
that I had messed up my local DNS configuration from previous local development. In a past life, I had done quite a
bit of local website development with vhosts and apache. Back then,
.dev was a common domain extension
for testing sites locally. However,
.dev is now available as a common TLD.
Anyhow, after some digging, I opened up terminal (I work on a Mac) and went through these steps:
scutil --dns in terminal
- Looked for any resolvers like:
resolver #8 domain : dev nameserver : 127.0.0.1 flags : Request A records, Request AAAA records reach : 0x00030002 (Reachable,Local Address,Directly Reachable Address)
cd /etc/resolver && ls
In that directory, I found a file named 'dev'. All I had to do was delete that file and could then view the LWC site in my browser with no errors.