+++ /dev/null
-# length-zero-no-unit
-
-Disallow units for zero lengths.
-
-```css
-a { top: 0px; }
-/** ↑↑
- * This zero and this type of length unit */
-```
-
-*Lengths* refer to distance measurements. A length is a *dimension*, which is a *number* immediately followed by a *unit identifier*. However, for zero lengths the unit identifier is optional. The length units are: `em`, `ex`, `ch`, `vw`, `vh`, `cm`, `mm`, `in`, `pt`, `pc`, `px`, `rem`, `vmin`, and `vmax`.
-
-The `--fix` option on the [command line](../../../docs/user-guide/cli.md#autofixing-errors) can automatically fix all of the problems reported by this rule.
-
-## Options
-
-### `true`
-
-The following patterns are considered violations:
-
-```css
-a { top: 0px }
-```
-
-```css
-a { top: 0.000em }
-```
-
-The following patterns are *not* considered violations:
-
-```css
-a { top: 0 } /* no unit */
-```
-
-```css
-a { transition-delay: 0s; } /* dimension */
-```
-
-```css
-a { top: 2in; }
-```
-
-```css
-a { top: 1.001vh }
-```
-
-## Optional secondary options
-
-### `ignore: ["custom-properties"]`
-
-#### `"custom-properties"`
-
-Ignore units for zero length in custom properties.
-
-The following pattern is *not* considered a violation:
-
-```css
-a { --x: 0px; }
-```