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font-weight-notation

Require numeric or named (where possible) font-weight values.

a { font-weight: bold; }
/**              ↑
 *               This notation */

a { font: italic small-caps 600 16px/3 cursive; }
/**                         ↑
 *                          And this notation, too */

@font-face { font-weight: normal bold; }
/**                       ↑
 *                        Multiple notations are available in @font-face */

This rule ignores $sass, @less, and var(--custom-property) variable syntaxes.

The fix option can automatically fix all of the problems reported by this rule.

Options​

string: "numeric"|"named-where-possible"

"numeric"​

font-weight values must always be numbers.

The following patterns are considered problems:

a { font-weight: bold; }
a { font: italic normal 20px sans-serif; }
@font-face { font-weight: normal bold; }

The following patterns are not considered problems:

a { font-weight: 700; }
a { font: italic 400 20px; }
@font-face { font-weight: 400 700; }

"named-where-possible"​

font-weight values must always be keywords when an appropriate keyword is available.

This means that only 400 and 700 will be rejected, because those are the only numbers with keyword equivalents (normal and bold).

The following patterns are considered problems:

a { font-weight: 700; }
a { font: italic 400 20px sans-serif; }

The following patterns are not considered problems:

a { font-weight: bold; }
a { font: italic normal 20px sans-serif; }

Optional secondary options​

ignore: ["relative"]​

Ignore the relative keyword names of bolder and lighter.

The following patterns are not considered problems:

a { font-weight: 400; }
a b { font-weight: lighter; }