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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
  • padding
  • border-color
  • border-radius
  • border-style
  • border-width
  • grid-gap

The fix option can automatically fix all of the problems reported by 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; }