padding:          0.2em 0.6em 0.2em 0.2em;

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Leading Zero

Rule leading-zero will enforce whether or not decimal numbers should include a leading zero.

Options

• include: true/false (defaults to false)

Examples

When include: false, the following are allowed. When include: true, the following are disallowed:

.foo {
  font-size: .5em;
}

When include: true, the following are allowed. When include: false, the following are disallowed:

.foo {
  font-size: 0.5em;
}

.c-sidebar-nav-link.c-active:hover .c-sidebar-nav-icon {

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Force Pseudo Nesting

Rule force-pseudo-nesting will enforce the nesting of pseudo elements/classes.

Examples

When enabled, the following are disallowed: ```scss p:nth-of-type(2) { margin: 0; }

.parent { .child { p::first-line { color: #ff0000; } } }

.parent { .child { .sub p::first-line { color: #ff0000; } } } ```

When enabled, the following are allowed:

p {
  &:nth-of-type(2) {
    margin: 0;
  }
}

.parent {
  .child {
    p {
      &::first-line {
        color: #ff0000;
      }
    }
  }
}

.parent {
  .child {
    .sub p {
      &::first-line {
        color: #ff0000;
      }
    }
  }
}

.dropdown-menu a:active {

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Force Pseudo Nesting

Rule force-pseudo-nesting will enforce the nesting of pseudo elements/classes.

Examples

When enabled, the following are disallowed: ```scss p:nth-of-type(2) { margin: 0; }

.parent { .child { p::first-line { color: #ff0000; } } }

.parent { .child { .sub p::first-line { color: #ff0000; } } } ```

When enabled, the following are allowed:

p {
  &:nth-of-type(2) {
    margin: 0;
  }
}

.parent {
  .child {
    p {
      &::first-line {
        color: #ff0000;
      }
    }
  }
}

.parent {
  .child {
    .sub p {
      &::first-line {
        color: #ff0000;
      }
    }
  }
}

.table-striped th.page {

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No Qualifying Elements

Rule no-qualifying-elements will enforce that selectors are not allowed to have qualifying elements.

Options

• allow-element-with-attribute: true/false (defaults to false)
• allow-element-with-class: true/false (defaults to false)
• allow-element-with-id: true/false (defaults to false)

Examples

By default, the following are disallowed:

div.foo {
  content: 'foo';
}

ul#foo {
  content: 'foo';
}

input[type='email'] {
  content: 'foo';
}

allow-element-with-attribute

When allow-element-with-attribute: true, the following are allowed. When allow-element-with-attribute: false, the following are disallowed.

input[type='email'] {
  content: 'foo';
}

a[href] {
  content: 'foo';
}

allow-element-with-class

When allow-element-with-class: true, the following are allowed. When allow-element-with-class: false, the following are disallowed.

div.foo {
  content: 'foo';
}

h1.bar {
  content: 'foo';
}

allow-element-with-id

When allow-element-with-id: true, the following are allowed. When allow-element-with-id: false, the following are disallowed.

ul#foo {
  content: 'foo';
}

p#bar {
  content: 'foo';
}

.table-striped .actions a {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}

.c-sidebar-nav-link.c-active:hover {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}

  margin:           0.5em 1px 0.1em;

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Leading Zero

Rule leading-zero will enforce whether or not decimal numbers should include a leading zero.

Options

• include: true/false (defaults to false)

Examples

When include: false, the following are allowed. When include: true, the following are disallowed:

.foo {
  font-size: .5em;
}

When include: true, the following are allowed. When include: false, the following are disallowed:

.foo {
  font-size: 0.5em;
}

main [type=file] {

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Attribute Quotes

Rule attribute-quotes will enforce the use of quotes in attribute values.

Options

• include: true/false (defaults to true)

Examples

include

When include: true, the following are allowed. When include: false, the following are disallowed:

span[lang="pt"] {
  color: green;
}

span[lang~="en-us"] {
  color: blue;
}

span[class^="main"] {
  background-color: yellow;
}

a[href*="example"] {
  background-color: #CCCCCC;
}

input[type="email" i] {
  border-color: blue;
}

When include: false, the following are allowed. When include: true, the following are disallowed:

span[lang=pt] {
  color: green;
}

span[lang~=en-us] {
  color: blue;
}

span[class^=main] {
  background-color: yellow;
}

a[href*=example] {
  background-color: #CCCCCC;
}

input[type=email i] {
  border-color: blue;
}

.c-sidebar-nav-link.c-active {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}

  fill:             $white !important;

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No Important

Rule no-important will enforce that important declarations are not allowed to be used.

Examples

When enabled, the following are disallowed:

.foo {
  content: 'bar' !important;
}

input.field_with_errors, select.field_with_errors, textarea.field_with_errors {

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No Qualifying Elements

Rule no-qualifying-elements will enforce that selectors are not allowed to have qualifying elements.

Options

• allow-element-with-attribute: true/false (defaults to false)
• allow-element-with-class: true/false (defaults to false)
• allow-element-with-id: true/false (defaults to false)

Examples

By default, the following are disallowed:

div.foo {
  content: 'foo';
}

ul#foo {
  content: 'foo';
}

input[type='email'] {
  content: 'foo';
}

allow-element-with-attribute

When allow-element-with-attribute: true, the following are allowed. When allow-element-with-attribute: false, the following are disallowed.

input[type='email'] {
  content: 'foo';
}

a[href] {
  content: 'foo';
}

allow-element-with-class

When allow-element-with-class: true, the following are allowed. When allow-element-with-class: false, the following are disallowed.

div.foo {
  content: 'foo';
}

h1.bar {
  content: 'foo';
}

allow-element-with-id

When allow-element-with-id: true, the following are allowed. When allow-element-with-id: false, the following are disallowed.

ul#foo {
  content: 'foo';
}

p#bar {
  content: 'foo';
}

input.field_with_errors, select.field_with_errors, textarea.field_with_errors {

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Single Line Per Selector

Rule single-line-per-selector will enforce whether selectors should be placed on a new line.

Examples

When enabled, the following are allowed:

.foo,
.bar {
  content: 'baz';
}

When enabled, the following are disallowed:

.foo, .bar {
  content: 'baz';
}

.table-striped .actions a:hover {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}

  background:   #ffdddd;

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No Color Literals

Rule no-color-literals will disallow the use of color literals and basic color functions in any declarations other than variables or maps/lists.

The list of affected color functions are as follows: * rgb * rgba * hsl * hsla

Other color functions, such as adjust-color and mix, may be used, but the original color must be passed in as a variable.

Options

• allow-map-identifiers: true/false (defaults to true)
• allow-rgba: true/false (defaults to false)
• allow-variable-identifiers: true/false (defaults to true)

Examples

When enabled and default options are used the following are disallowed.

.literal {
  color: mediumslateblue;
}

.linear-gradient-func {
  background: linear-gradient(top, #fff, white);
}

.box-shadow {
  box-shadow: 1px 1px black, 1px 1px black;
}

.background {
  background: 1px solid white;
}

.hex {
  color: #fff;
}

// rgb function passed directly as function argument
.adj {
  color: adjust-color(rgb(255, 0, 0), $blue: 5);
}

// hsl function passed directly as function argument
.scale {
  color: scale-color(hsl(120, 70%, 80%), $lightness: 50%);
}

// hsl function passed directly as function argument
.change {
  color: change-color(hsl(25, 100%, 80%), $lightness: 40%, $alpha: .8);
}

// color literal passed directly as function argument
.function {
  color: test(#fff);
}

// color functions used directly as property values
.rgb {
  color: rgb(255, 255, 255);
}

.rgba {
  color: rgba(255, 255, 255, .3);
}

.hsl {
  color: hsl(40, 50%, 50%);
}

.hsla {
  color: hsla(40, 50%, 50%, .3);
}

When enabled and default options are used the following are allowed.

$literal: mediumslateblue;
$hexVar: #fff;
$rgb: rgb(255, 255, 255);
$rgba: rgba(255, 255, 255, .3);
$hsl: hsl(40, 50%, 50%);
$hsla: hsla(40, 50%, 50%, .3);

// using color literals as property names
$colors: (
  red: #fff,
  blue : (
    orange: #fff
  )
);

// using color literals as variable identifiers
$black: #000;

.literal {
  color: $literal;
}

.linear-gradient-func {
  background: linear-gradient(top, $hexVar, $literal);
}

.background {
  background: 1px solid $literal;
}

.hex {
  color: $hexVar;
}

.adj {
  color: adjust-color($off-red, $blue: 5);
}

.scale {
  color: scale-color($off-blue, $lightness: 50%);
}

.change {
  color: change-color($orange-extra, $lightness: 40%, $alpha: .8);
}

.function {
  color: test($hexVar);
}

.rgb {
  color: $rgb;
}

.rgba {
  color: $rgba;
}

.hsl {
  color: $hsl;
}

.hsla {
  color: $hsla;
}

---

[allow-rgba: true]

When enabled and allow-rgba is set to true, the following will be allowed:

// rgba in variables is still fine
$rgba: rgba(255, 0, 0, .5);
$red: rgb(255, 255, 255,);

// rgba can be used directly to alter a variables opacity
.color {
  color: rgba($red, .3);
}

In addition, when enabled and allow-rgba is set to true, the following will be disallowed:

.color {
  // you must use variables and not literals
  color: rgba(0, 0, 0, .3);
  color: rgba(black, .3);
}

---

[allow-variable-identifiers: false]

When enabled and allow-variable-identifiers is set to false, the following will be disallowed

// variable uses a color literal as an identifier
$black: #000

// variable using a color literal as an identifier is passed to a function
.test {
  color: adjust-color($off-red, $blue: 5)
}

When enabled and allow-variable-identifiers is set to false, the following will be allowed

// variable not directly using a color literal as an identifier
$primary-black: #000

---

[allow-map-identifiers: false]

When enabled and allow-map-identifiers is set to false, the following will be disallowed

// map identifiers red, blue and orange share their name with a
// color literal and therefore shouldn't be used
$colors: (
  red: #f00,
  blue: (
    orange: $orange
  )
)

When enabled and allow-map-identifiers is set to false, the following will be allowed

$colors: (
  primary-red: #f00,
  map-blue: (
    off-orange: $orange
  )
)

.c-sidebar-nav-link.c-active .c-sidebar-nav-icon {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}

  border: none;

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Border Zero

Rule border-zero will enforce whether one should use 0 or none when specifying a zero border value

Options

• convention: '0'/'none' (defaults to 0)

If an invalid convention is provided the rule will default back to convention: '0'. An extra warning/error will also be thrown on line 1 column 1 of a file with a lint issue to inform you of this fact.

Examples

When convention: '0', the following are allowed. When convention: 'none', the following are disallowed:

.foo {
  border: 0;
}

.bar {
  border-right: 0;
}

When convention: 'none', the following are allowed. When convention: '0', the following are disallowed:

.foo {
  border: none;
}

.bar {
  border-left: none;
}

Invalid conventions

When the invalid convention convention: 'zero' is supplied, the following are allowed as the rule defaults to convention: '0'.

.foo {
  border: none;
}

.bar {
  border-left: 0;
}

.table-striped .actions a:hover {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}

.content tr {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}

  background-image: -ms-linear-gradient(top,$button-bg-hover, $dark-red);

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No Duplicate Properties

Rule no-duplicate-properties will enforce that duplicate properties are not allowed within the same block.

Options

• exclude: [array of property names to be excluded from this rule] (defaults to empty array [])

Examples

When enabled, the following are disallowed:

.foo {
  margin: 0 0 15px;
  margin: 0;
}

Exclude

When a property is added to the exclude array as shown below then you may place duplicate properties immediately after one another, this is to prevent accidental duplication of properties.

no-duplicate-properties:
  - 1
  -
    exclude:
      - display

When display is added to the exclude array the following would be allowed:

.display-block {
  display: flex;
  display: inline-block;
  float: right;
}

When display is added to the exclude array the following would still be disallowed as the duplicate properties are separated by another property:

.display-block {
  display: flex;
  float: right;
  display: inline-block;
}

main p {

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Force Element Nesting

Rule force-element-nesting will enforce the nesting of elements

Examples

When enabled, the following are disallowed:

div p {
  content: '';
}

.parent {
  &__child h1 {
    content: '';
  }
}

a[target="_blank"] span {
  content: '';
}

When enabled, the following are allowed:

div {
  p {
    content: '';
  }
}

.parent {
  &__child {
    h1 {
      content: '';
    }
  }
}

a[target="_blank"] {
  span {
    content: '';
  }
}