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As opposed to most other text input fields you encounter in the wild, credit cards (and phone numbers) have a singular canonical format. As long as you don't li

As opposed to most other text input fields you encounter in the wild, credit cards (and phone numbers) have a singular canonical format. As long as you don't limit HOW it's entered (or pasted), it makes a lot of sense to coerce the input into the canonical format.

eli 11y ago
Most fields don't reformat and add characters like spaces as I type. I personally find it a bit jarring. I suppose reformatting it one the box loses focus isn't as bad, but I'd still prefer you just keep what I type.
- cdcarter 11y ago
  The iPhone reformats phone numbers as you type them, and I personally don't find it jarring at all.
  - harywilke 11y ago
    Try moving to a country that splits phone numbers different that what you are used to. I grew up with 3-3-4 but live in a country that splits 2-4-4. Subtly annoying.
stonogo 11y ago
They most certainly do not have a singular canonical format. American Express cards use different groupings and a four-digit card security code.
- abhorrence 11y ago
  At least for the US, the issuer of a credit card (and thus the format) can frequently be determined from as little as the first digit. For instance, nearly all card numbers starting with '4' are Visa.