HTML5 form validation pattern alphanumeric with spaces?

Question

I have the following input tag in my html5 form:

    Company Name*
    

        

Answer 1

To avoid an input with only spaces, use: "[a-zA-Z0-9]+[a-zA-Z0-9 ]+".

eg: abc | abc aBc | abc 123 AbC 938234

To ensure, for example, that a first AND last name are entered, use a slight variation like

"[a-zA-Z]+[ ][a-zA-Z]+"

eg: abc def