Question

what are three characters that are subject to whitespace collapsing?

Answer 1

What are three characters that are subject to whitespace collapsing?

The CSS Text Level 3 specification redefines the white-space property as a shorthand property for setting two new properties: white-space-collapsing, which controls the treatment of white space in the source code, and text-wrap, which determines where the browser can break lines of text. The following table summarises the correspondences between these three properties:

white-space	white-space-collapsing	text-wrap
normal	collapse	normal
pre	preserve	none
nowrap	collapse	none
pre-wrap	preserve	normal
pre-line	preserve-breaks	normal

The white-space-collapsing property has five possible values:

collapse

causes white space to collapse

preserve

prevents white space from collapsing

preserve-breaks

causes white space to collapse but preserves new lines

discard

causes all white space to be discarded

trim-inner

causes leading and trailing blank lines to be discarded

The text-wrap property has three possible values:

normal

causes lines to be broken where necessary

none

prevents lines from breaking except where forced by new line characters or br elements

avoid

prevents lines from breaking inside an element except where there are no other possible break points in the line