space key breaks the integrity

[rghiglianovich]

Description

The space key behaves differentely from the letter keys ,especially if there is no other input value

in particular, if you hit only letters, the modelValue is 0 but if you hit space the value is space (or null?)

Expected outcome

the space key should behave like a letter key

Live Demo

https://jsbin.com/hoputodequ/edit?html,output

Steps to reproduce

1. type some numbers in the input field and see the correct value in modelValue
2. double click the input field to select all
3. hit some letters: the modelValue will be 0 : OK
4. type some numbers in the input field and see the correct value in modelValue
5. double click the input field to select all
6. hit space: the modelValue will be "" : KO

Thanks,
RIc