2.5 KiB
selector-pseudo-element-colon-notation
Specify single or double colon notation for applicable pseudo-elements.
a::before {}
/** ↑
* This notation */The :: notation was chosen for pseudo-elements
to establish a discrimination between pseudo-classes (which
subclass existing elements) and pseudo-elements (which are
elements not represented in the document tree).
However, for compatibility with existing style sheets, user agents
also accept the previous one-colon notation for pseudo-elements
introduced in CSS levels 1 and 2 (namely, :first-line,
:first-letter, :before and
:after).
The fix
option can automatically fix all of the problems reported by this
rule.
Options
string: "single"|"double"
"single"
Applicable pseudo-elements must always use the single colon notation.
The following patterns are considered violations:
a::before { color: pink; }a::after { color: pink; }a::first-letter { color: pink; }a::first-line { color: pink; }The following patterns are not considered violations:
a:before { color: pink; }a:after { color: pink; }a:first-letter { color: pink; }a:first-line { color: pink; }input::placeholder { color: pink; }li::marker { font-variant-numeric: tabular-nums; }"double"
Applicable pseudo-elements must always use the double colon notation.
The following patterns are considered violations:
a:before { color: pink; }a:after { color: pink; }a:first-letter { color: pink; }a:first-line { color: pink; }The following patterns are not considered violations:
a::before { color: pink; }a::after { color: pink; }a::first-letter { color: pink; }a::first-line { color: pink; }input::placeholder { color: pink; }li::marker { font-variant-numeric: tabular-nums; }