Syntax: normal | spell-out || digits || [ literal-punctuation | no-punctuation ]
normal | spell-out || digits || [ literal-punctuation | no-punctuation ]
Initial value: auto
auto
| Chrome | Firefox | Safari | Edge | IE | | :----: | :-----: | :------: | :--: | :-: | | No | No | 11.1 | No | No |
MDN