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# media-query-list-comma-space-before
Require a single space or disallow whitespace before the commas of media query lists.
```css
@media screen and (color) ,projection and (color) {}
/** ↑
* These commas */
```
## Options
`string`: `"always"|"never"|"always-single-line"|"never-single-line"`
### `"always"`
There *must always* be a single space before the commas.
The following patterns are considered warnings:
```css
@media screen and (color),projection and (color) {}
```
```css
@media screen and (color)
,projection and (color) {}
```
The following patterns are *not* considered warnings:
```css
@media screen and (color) ,projection and (color) {}
```
```css
@media screen and (color) ,
projection and (color) {}
```
### `"never"`
There *must never* be whitepace before the commas.
The following patterns are considered warnings:
```css
@media screen and (color) ,projection and (color) {}
```
```css
@media screen and (color)
, projection and (color) {}
```
The following patterns are *not* considered warnings:
```css
@media screen and (color),projection and (color) {}
```
```css
@media screen and (color),
projection and (color) {}
```
### `"always-single-line"`
There *must always* be a single space before the commas in single-line media query lists.
The following patterns are considered warnings:
```css
@media screen and (color),projection and (color) {}
```
The following patterns are *not* considered warnings:
```css
@media screen and (color) ,projection and (color) {}
```
```css
@media screen and (color)
, projection and (color) {}
```
```css
@media screen and (color)
,projection and (color) {}
```
### `"never-single-line"`
There *must never* be whitepace before the commas in single-line media query lists.
The following patterns are considered warnings:
```css
@media screen and (color) , projection and (color) {}
```
The following patterns are *not* considered warnings:
```css
@media screen and (color),projection and (color) {}
```
```css
@media screen and (color)
,projection and (color) {}
```
```css
@media screen and (color)
, projection and (color) {}
```