grid-template-columns
=====================

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-------------------------

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A propriedade `grid-template-columns` do CSS define os nomes das linhas e funções de dimensionamento (track sizing) do grid columns (en-US).


```css
/\* valores padrão \*/
grid-template-columns: none;

/\* exemplos de <track-list> \*/
grid-template-columns: 100px 1fr;
grid-template-columns: [linename] 100px;
grid-template-columns: [linename1] 100px [linename2 linename3];
grid-template-columns: minmax(100px, 1fr);
grid-template-columns: fit-content(40%);
grid-template-columns: repeat(3, 200px);

/\* exemplos de <auto-track-list> \*/
grid-template-columns: 200px repeat(auto-fill, 100px) 300px;
grid-template-columns:
  minmax(100px, max-content)
  repeat(auto-fill, 200px) 20%;
grid-template-columns:
  [linename1] 100px [linename2]
  repeat(auto-fit, [linename3 linename4] 300px)
  100px;
grid-template-columns:
  [linename1 linename2] 100px
  repeat(auto-fit, [linename1] 300px) [linename3];

/\* definições de herança \*/
grid-template-columns: inherit;
grid-template-columns: initial;
grid-template-columns: unset;
```


|  |  |
| --- | --- |
| Initial value | `none` |
| Aplica-se a | grid containers |
| Inherited | não |
| Percentages | refer to corresponding dimension of the content area |
| Computed value | as specified, but with relative lengths converted into absolute lengths |
| Animation type | simple list of length, percentage, or calc, provided the only differences are in the values of the length, percentage, or calc components in the list |

Sintaxe
-------

### Alternativas

`none`

Indica que não há uma grade explícita. Colunas serão automaticamente geradas e seu tamanho será determinado pela propriedade `grid-auto-columns` (en-US).

`<length>`

Tamanho não negativo.

`<percentage>`

 Is a non-negative `<percentage>` (en-US) value relative to the inline size of the grid container. If the size of the grid container depends on the size of its tracks, then the percentage must be treated as `auto`.
 The intrinsic size contributions of the track may be adjusted to the size of the grid container and increase the final size of the track by the minimum amount that would result in honoring the percentage.


`<flex>`

Is a non-negative dimension with the unit `fr` specifying the track's flex factor. Each `<flex>`-sized track takes a share of the remaining space in proportion to its flex factor.

When appearing outside a `minmax()` notation, it implies an automatic minimum (i.e. `minmax(auto, <flex>)`).

`max-content`

Is a keyword representing the largest maximal content contribution of the grid items occupying the grid track.

`min-content`

Is a keyword representing the largest minimal content contribution of the grid items occupying the grid track.

``minmax(min, max)` (en-US)`

Is a functional notation that defines a size range greater than or equal to *min* and less than or equal to *max*. If *max* is smaller than *min*, then *max* is ignored and the function is treated as *min*. As a maximum, a `<flex>` value sets the track's flex factor. It is invalid as a minimum.

`auto`

Is a keyword that is identical to maximal content if it's a maximum. As a minimum it represents the largest minimum size (as specified by `min-width` (en-US)/`min-height`) of the grid items occupying the grid track.

**Nota:**: `auto` track sizes (and only `auto` track sizes) can be stretched by the `align-content` and `justify-content` (en-US) properties.

``fit-content( [ <length> | <percentage> ] )` (en-US)`

Represents the formula `min(max-content, max(auto, argument))`, which is calculated similar to `auto` (i.e. `minmax(auto, max-content)`), except that the track size is clamped at *argument* if it is greater than the `auto` minimum.

`repeat( [ <positive-integer> | auto-fill | auto-fit ] , <track-list> )` (en-US)

Represents a repeated fragment of the track list, allowing a large number of columns that exhibit a recurring pattern to be written in a more compact form.

### Sintaxe formal
```

grid-template-columns =   
  none                       | (en-US)  
  <track-list>               | (en-US)  
  <auto-track-list>          | (en-US)  
  subgrid <line-name-list>? (en-US)    
  
<track-list> =   
  [ (en-US) <line-names>? (en-US) [ (en-US) <track-size> | (en-US) <track-repeat> ] (en-US) ] (en-US)+ (en-US) <line-names>? (en-US)    
  
<auto-track-list> =   
  [ (en-US) <line-names>? (en-US) [ (en-US) <fixed-size> | (en-US) <fixed-repeat> ] (en-US) ] (en-US)\* (en-US) <line-names>? (en-US) <auto-repeat> [ (en-US) <line-names>? (en-US) [ (en-US) <fixed-size> | (en-US) <fixed-repeat> ] (en-US) ] (en-US)\* (en-US) <line-names>? (en-US)    
  
<line-name-list> =   
  [ (en-US) <line-names> | (en-US) <name-repeat> ] (en-US)+ (en-US)    
  
<line-names> =   
  '[' <custom-ident> (en-US)\* (en-US) ']'    
  
<track-size> =   
  <track-breadth>                                   | (en-US)  
  minmax( <inflexible-breadth> , <track-breadth> )  | (en-US)  
  fit-content( <length-percentage [0,∞]> )            
  
<track-repeat> =   
  repeat( [ (en-US) <integer [1,∞]> ] (en-US) , [ (en-US) <line-names>? (en-US) <track-size> ] (en-US)+ (en-US) <line-names>? (en-US) )    
  
<fixed-size> =   
  <fixed-breadth>                                   | (en-US)  
  minmax( <fixed-breadth> , <track-breadth> )       | (en-US)  
  minmax( <inflexible-breadth> , <fixed-breadth> )    
  
<fixed-repeat> =   
  repeat( [ (en-US) <integer [1,∞]> ] (en-US) , [ (en-US) <line-names>? (en-US) <fixed-size> ] (en-US)+ (en-US) <line-names>? (en-US) )    
  
<auto-repeat> =   
  repeat( [ (en-US) auto-fill | (en-US) auto-fit ] (en-US) , [ (en-US) <line-names>? (en-US) <fixed-size> ] (en-US)+ (en-US) <line-names>? (en-US) )    
  
<name-repeat> =   
  repeat( [ (en-US) <integer [1,∞]> | (en-US) auto-fill ] (en-US) , <line-names>+ (en-US) )    
  
<track-breadth> =   
  <length-percentage [0,∞]>  | (en-US)  
  <flex [0,∞]>               | (en-US)  
  min-content                | (en-US)  
  max-content                | (en-US)  
  auto                         
  
<inflexible-breadth> =   
  <length-percentage [0,∞]>  | (en-US)  
  min-content                | (en-US)  
  max-content                | (en-US)  
  auto                         
  
<length-percentage> =   
  <length> (en-US)      | (en-US)  
  <percentage> (en-US)    
  
<fixed-breadth> =   
  <length-percentage [0,∞]>    
  
```

Exemplos
--------

### CSS


```css
#grid {
  display: grid;
  width: 100%;
  grid-template-columns: 50px 1fr;
}

#areaA {
  background-color: lime;
}

#areaB {
  background-color: yellow;
}
```

### HTML


```html
<div id="grid">
  <div id="areaA">A</div>
  <div id="areaB">B</div>
</div>
```

### Resultado

Especificações
--------------

| Specification |
| --- |
| CSS Grid Layout Module Level 2 # track-sizing |
| CSS Grid Layout Module Level 2 # subgrids |
| CSS Grid Layout Module Level 3 # masonry-layout |

Compatibilidade com navegadores
-------------------------------

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Leia Mais
---------

* Propriedades CSS relacionadas: `grid-template-rows`, `grid-template-areas` (en-US), `grid-template` (en-US)
* Guia do *layout* em grade: *Basic concepts of grid layout - Grid Tracks*
* Tutorial em vídeo: *Defining a Grid*

1. **CSS**
2. **Referência do CSS**
3. CSS: Layout em grid
4. **Guia**
    1. Basics concepts of grid layout
    2. Relationship to other layout methods
    3. Line-based placement (en-US)
    4. Grid template areas (en-US)
    5. Layout using named grid lines (en-US)
    6. Auto-placement in grid layout (en-US)
    7. Box alignment in grid layout (en-US)
    8. Grids, logical values and writing modes (en-US)
    9. CSS Grid Layout and Accessibility (en-US)
    10. CSS Grid Layout and Progressive Enhancement (en-US)
    11. Realizing common layouts using grids (en-US)
5. **Propriedades**
    1. grid
    2. grid-area (en-US)
    3. grid-auto-columns (en-US)
    4. grid-auto-flow
    5. grid-auto-rows (en-US)
    6. grid-column (en-US)
    7. grid-column-end (en-US)
    8. grid-column-gap (en-US)
    9. grid-column-start (en-US)
    10. grid-gap (en-US)
    11. grid-row (en-US)
    12. grid-row-end (en-US)
    13. grid-row-gap (en-US)
    14. grid-row-start (en-US)
    15. grid-template (en-US)
    16. grid-template-areas (en-US)
    17. grid-template-columns
    18. grid-template-rows
6. **Glossário**
    1. Grid lines (en-US)
    2. Grid tracks (en-US)
    3. Grid cell (en-US)
    4. Grid areas
    5. Gutters (en-US)
    6. Grid row (en-US)
    7. Grid column (en-US)