For me this link is work fine.
Try to clear browser cache:
Ctrl + Shift + R
Please kindly try to clear the browser cache and rety. As per our checking the link is working fine.
Sorry, I ment the links on that page: documentation and examples
I get a 404 on github.com.
Thank you for your message,
We will fix it. Here is the correct link: https://formatjs.io/docs/getting-started/installation/.
Perfect, thank you