Controls how white space and line breaks within an element's text are handled.
| Normal | Sequences of whitespace will collapse into a single whitespace. Text will wrap when necessary. This is the default behavior. |
| NoWrap | Sequences of whitespace will collapse into a single whitespace. Text will never wrap to the next line. |
| Pre | Whitespace is preserved. Text will only wrap on line breaks. |
| PreWrap | Whitespace is preserved. Text will wrap when necessary. |