What is it in the CSS/DOM that prevents an input box with display: block from expanding to the size of its container

Question

Sample HTML/CSS:

    
    



div.container         


        

Answer 1

As far as I know, the default length of the input text field is 20 characters.

I guess that's the value it gets when you set it to auto. Usually it is not useful to have a text field of the size of width of the screen, that's why I guess it defaults to 20 characters in auto.

Anyway, it should be better to check the w3c standard, or get a response from some browser developer.