I use a standardization library for phone numbers. It makes parsing any user input dead easy, storing it as a standard string (can’t think of the standard name) and then outputting in the country’s respective format. I don’t have to inject a bunch of JavaScript crap that’s like “wrong format” and harass users; the backend sorts it all out.
In Germany this is standardized, too. DIN 5008 for phone numbers. Areacode Number-extension. For example 0123 456789-01
I use a standardization library for phone numbers. It makes parsing any user input dead easy, storing it as a standard string (can’t think of the standard name) and then outputting in the country’s respective format. I don’t have to inject a bunch of JavaScript crap that’s like “wrong format” and harass users; the backend sorts it all out.