Caroline Jarrett
Forms and survey specialist
You can solve this problem by showing instructions, examples or hints to help users figure out what format they should use for this field.
Designing Perfect Text Field: Clarity, Accessibility and User Effort
Nick Babich
1K38
Good point.
You can also solve the problem by letting users input whatever format they like, and then use your input validation to extract the number from it.
Progam it properly once, save problems for users forever.
