Values may be negative, but there may be implementation-specific limits. Character spacing algorithms are user agent-dependent. When the resultant space between two characters is not the same as the default space, user agents should not use ligatures. This value indicates inter-word space in addition to the default space between words. Values may be negative, but there may be implementation-specific limits.
Word spacing algorithms are user agent-dependent.
In this example, the word-spacing between each word in H1 elements is increased by '1em'. Puts all characters of each word in lowercase. The actual transformation in each case is written language dependent. In this example, all text in an H1 element is transformed to uppercase text. Please consult the sections on first line and first letter for information on specially formatting the first letter or line of a paragraph.