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string-no-newline

Disallow invalid newlines within strings.

a {
  content: "foo
    bar"; }/*  ↑
 *             ↑
 * The newline here */

The spec says this: "A string cannot directly contain a newline. To include a newline in a string, use an escape representing the line feed character in ISO-10646 (U+000A), such as '\A' or '\00000a'." And also: "It is possible to break strings over several lines, for aesthetic or other reasons, but in such a case the newline itself has to be escaped with a backslash (\)."

This rule overlaps with:

We recommend configuring this rule so that it doesn't overlap.

Options​

true​

The following patterns are considered problems:

a {
  content: "foo
    bar";
}
[title="something
is probably wrong"] {}
a {
  font-family: "Times
    New
    Roman";
}

The following patterns are not considered problems:

a {
  content: "foo\Abar";
}
a {
  content: "foo\\nbar";
}
[title="nothing\
  is wrong"] {}
a {
  font-family: "Times New Roman";
}

Optional secondary options​

ignore: ["at-rule-preludes", "declaration-values"]​

"at-rule-preludes"​

Ignore strings in at-rule preludes.

The following patterns are not considered problems:

@import url('foo
.css');

"declaration-values"​

Ignore strings in declaration values.

The following patterns are not considered problems:

a {
  content: "foo
    bar";
}