4 ms·
One small consideration is that the American Express number format differs from other cards so the pattern of dots might change as you type.
by skeoh 13y ago
One small consideration is that the American Express number format differs from other cards so the pattern of dots might change as you type.
- isleyaardvark 13y agoThe format can be determined from the first one or two numbers entered in the field: http://en.wikipedia.org/wiki/List_of_Issuer_Identification_Numbers http://en.wikipedia.org/wiki/List_of_Issuer_Identification_N... edit: which doesn't change your point that initial format could move around after you type the first digits. I'll leave this here for trivia.