I see this one all the time: something that looks like a button, but only a portion of it is tappable.
Browse by Tag: Web Design 101
Web forms are complex beasts. There are a lot of field types to remember, each with dozens of attributes. It’s hard to know which is the right way to go, especially when presented with a choice between two seemingly similar options for disallowing a field to be edited:
TL;DR: If you really need it, which you probably don’t,
readonly is what you want.