I have been trying locally on XAMPP develop new custom WordPress theme. I choose to implement custom font on titles with help of Adobe Typekit fonts. It took me nearly 2 hours to solve problem with not showing fonts nowhere locally. I tied every possible scenario, I changed everything what I thought might be a cause.
And solution? Well, bug was in Typekit font Kit settings. Domain of usage contained only web domain, not a localhost IP addressI. I would give a recommendation to Typekit – Make first-time users a tour around product instead of small gray hints.
For example: “*.nytimes.com, localhost, 127.0.0.1”