#declaration-block-no-ignored-properties

Deprecated: See CHANGELOG.

Disallow property values that are ignored due to another property value in the same rule.

a { display: inline; width: 100px; }
/**                  ↑
 *       This property */

Certain property value pairs rule out other property value pairs, causing them to be ignored by the browser. For example, when an element has display: inline, any further declarations about width, height and margin-top properties will be ignored. Sometimes this is confusing: maybe you forgot that your margin-top will have no effect because the element has display: inline, so you spend a while struggling to figure out what you've done wrong. This rule protects against that confusion by ensuring that within a single rule you don't use property values that are ruled out by other property values in that same rule.

The rule warns when it finds:

  • display: inline used with width, height, margin, margin-top, margin-bottom, overflow (and all variants).
  • display: list-item used with vertical-align.
  • display: block used with vertical-align.
  • display: flex used with vertical-align.
  • display: table used with vertical-align.
  • display: table-* used with margin (and all variants).
  • display: table-* (except table-cell) used with vertical-align.
  • display: table-(row|row-group) used with width, min-width or max-width.
  • display: table-(column|column-group) used with height, min-height or max-height.
  • float: left and float: right used with vertical-align.
  • position: static used with top, right, bottom, or left.
  • position: absolute used with float, clear or vertical-align.
  • position: fixed used with float, clear or vertical-align.

#Options

#true

The following patterns are considered warnings:

a { display: inline; width: 100px; }

display: inline causes width to be ignored.

a { display: inline; height: 100px; }

display: inline causes height to be ignored.

a { display: inline; margin: 10px; }

display: inline causes margin to be ignored.

a { display: block; vertical-align: baseline; }

display: block causes vertical-align to be ignored.

a { display: flex; vertical-align: baseline; }

display: flex causes vertical-align to be ignored.

a { position: absolute; vertical-align: baseline; }

position: absolute causes vertical-align to be ignored.

a { float: left; vertical-align: baseline; }

float: left causes vertical-align to be ignored.

The following patterns are not considered warnings:

a { display: inline: margin-left: 10px; }
a { display: inline: margin-right: 10px; }
a { display: inline: padding: 10px; }
a { display: inline-block; width: 100px; }

Although display: inline causes width to be ignored, inline-block works with width.

a { display: table-cell; vertical-align: baseline; }

Although display: block causes vertical-align to be ignored, table-cell works with vertical-align.

a { position: relative; vertical-align: baseline; }

Although position: absolute causes vertical-align to be ignored, relative works with vertical-align.