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shorthand-property-no-redundant-values

Disallow redundant values within shorthand properties.

a { margin: 1px 1px 1px 1px; }
/**             ↑   ↑   ↑
 *           These values */

You can use shorthand properties to set multiple values at once. For example, you can use the margin property to set the margin-top, margin-right, margin-bottom, and margin-left properties at once.

For some shorthand properties, e.g. those related to the edges of a box, you can safely omitted some values.

This rule checks the following shorthand properties:

  • margin, margin-block, margin-inline
  • padding, padding-block, padding-inline
  • border-color, border-style, border-width
  • border-radius
  • border-block-color, border-block-style, border-block-width
  • border-inline-color, border-inline-style, border-inline-width
  • gap, grid-gap
  • overflow,
  • overscroll-behavior,
  • scroll-margin, scroll-margin-block, scroll-margin-inline
  • scroll-padding, scroll-padding-block, scroll-padding-inline
  • inset, inset-block, inset-inline

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

The message secondary option can accept the arguments of this rule.

Options​

true​

The following patterns are considered problems:

a { margin: 1px 1px; }
a { margin: 1px 1px 1px 1px; }
a { padding: 1px 2px 1px; }
a { border-radius: 1px 2px 1px 2px; }
a { -webkit-border-radius: 1px 1px 1px 1px; }

The following patterns are not considered problems:

a { margin: 1px; }
a { margin: 1px 1px 1px 2px; }
a { padding: 1px 1em 1pt 1pc; }
a { border-radius: 10px / 5px; }