Css Grid Area Layout Essentials is a game-changer for designers and developers. It allows you to create complex layouts with ease, thanks to its powerful grid system.
With Grid Area, you can define specific regions within your grid, making it easier to manage and style individual elements. This feature is particularly useful for creating responsive designs that adapt to different screen sizes.
One of the key benefits of Grid Area is its ability to simplify complex layouts. By breaking down your grid into smaller, manageable areas, you can focus on styling and designing each section independently.
Grid Area Properties
Grid Area Properties are a crucial part of CSS Grid Area, allowing you to define the size and location of a grid item within a grid layout.
You can use the grid-area property as a shorthand for grid-row-start, grid-column-start, grid-row-end, and grid-column-end, separated by a /. For example, grid-area: "1 / 2 / 3 / 4" would start on row 1 and column 2, and span 2 rows and 2 columns.
Alternatively, you can use the grid-area property to assign a name to a grid item, which can be referenced by a template created with the grid-template-areas property. This can be done by simply assigning a name to the grid-area property, like grid-area: "item-name".
Here are the constituent properties of the grid-area property:
- grid-row-start
- grid-column-start
- grid-row-end
- grid-column-end
The grid-area property also allows you to use the span keyword to make a grid item span multiple tracks. For example, grid-area: "1 / 2 / span 2 / span 3" would start on row 1 and column 2, and span 2 rows and 3 columns.
Area
Grid Area Properties are a powerful tool for web developers, allowing us to create complex layouts with ease.
Grid Area is the total space surrounded by four grid lines, and it can be composed of any number of grid cells.
To define a grid area, you can use the grid-area property, which is a shorthand for grid-row-start, grid-column-start, grid-row-end, and grid-column-end.
The grid-area property can be used as a shorthand for specifying the size and location of a grid item in a grid layout.
A grid area can be assigned a name using the grid-template-areas property, which allows you to reference the grid area by its name.
Here's a breakdown of the different ways to assign a name to a grid area:
- Using the grid-area property with a name and grid line values
- Using the grid-area property as a shorthand for grid-row-start + grid-column-start + grid-row-end + grid-column-end
Here are some examples of how to use the grid-area property to assign a name to a grid area:
- grid-area: header / 1 / 2 / 3
- grid-area: header / 1 / 2 / 3 / 4
Note that the grid-area property can be used to assign a name to a grid area, but it can also be used as a shorthand for specifying the size and location of a grid item in a grid layout.
To make a grid item span multiple tracks, you can use the span keyword followed by an integer or a custom identifier.
Here are some examples of how to use the span keyword to make a grid item span multiple tracks:
- grid-column: span 2
- grid-row: span x 2
Note that the span keyword can be used to make a grid item span multiple tracks, but it can also be used to specify the number of tracks a grid item spans from a specific grid line.
Auto-Rows
Grid-auto-rows specifies the size of any auto-generated grid tracks, also known as implicit grid tracks.
These tracks get created when there are more grid items than cells in the grid or when a grid item is placed outside of the explicit grid.
You can specify the size of implicit tracks using a length, a percentage, or a fraction of the free space in the grid (using the fr unit).
To illustrate this, think about a grid where an item starts on column line 5 and ends at column line 6, but no column line 5 or 6 is defined. Implicit tracks with widths of 0 are created to fill in the gaps.
Grid-auto-rows can be used to specify the heights of these implicit tracks.
Grid Display and Template
Grid-template-areas defines a grid template by referencing the names of the grid areas specified with the grid-area property.
You can use any number of adjacent periods to declare a single empty cell, as long as the periods have no spaces between them.
Each row in your declaration needs to have the same number of cells. To specify the number of columns of the grid and the widths of each column, the CSS property grid-template-columns is used on the grid container.
To define the columns and rows of the grid, you can use the grid-template-columns and grid-template-rows properties, which take a space-separated list of values representing the track size and the space between them.
Display
The display property is crucial in defining the element as a grid container, which establishes a new grid formatting context for its contents. This is achieved by setting the display property to either grid or inline-grid.
The values for the display property are straightforward: grid generates a block-level grid, while inline-grid generates an inline-level grid.
If you're looking to create a block-level grid, you'll want to use the grid value. On the other hand, if you need an inline-level grid, inline-grid is the way to go.
In our previous examples, we've seen how display grid is used to create 2D layouts. This is a key advantage of using CSS Grids over other layout methods like flexbox, which is limited to one-dimensional layouts.
Template-Columns
Grid Template Columns allow you to specify the number of columns and their widths. This is done using the CSS property grid-template-columns on the grid container.
You can use either pixels (px) or percentages (%) to define the width of each column. The number of width values determines the number of columns.
For example, you can specify two columns with widths of 200px and 300px like this: grid-template-columns: 200px 300px.
Grid Template Columns can also be defined using the repeat() notation, which can save you time when you have repeating parts in your definition. This is equivalent to listing out each column individually.
The fr unit allows you to set the size of a track as a fraction of the free space of the grid container. This can be useful for creating columns that take up equal or proportional space.
Here's an example of how you can use the fr unit to create three columns that take up equal space: grid-template-columns: 1fr 1fr 1fr.
Template-Areas
You can define a grid template by referencing the names of the grid areas specified with the grid-area property. This is done using the grid-template-areas property.
A grid area is referenced by its name, and repeating the name causes the content to span those cells. A period signifies an empty cell.
Here's an example of how this works: grid-template-areas: "header header header" "main . main" "footer footer footer"; This creates a grid that's four columns wide by three rows tall.
Each row in your declaration needs to have the same number of cells. You can use any number of adjacent periods to declare a single empty cell.
Some lines might have multiple names, as the name of a grid area also names the starting row line and starting column line, and the last row line and last column line. For example, if the name of your grid area is foo, the name of the area's starting row line and starting column line will be foo-start, and the name of its last row line and last column line will be foo-end.
Grid Gaps and Spacing
Grid gaps and spacing are a crucial aspect of CSS grid layout.
The CSS Gap property, also known as the gap property, adds gaps between grid cells or flex items. It's a shortcut for row-gap and column-gap.
You can specify a single value for gap, which sets both row-gap and column-gap to the same value. Alternatively, you can use two values, where the first value sets the row-gap and the second value sets the column-gap.
The unprefixed gap property is already supported in Chrome 68+, Safari 11.2 Release 50+, and Opera 54+.
Here are some key points to keep in mind when working with grid gaps:
- gap is a shorthand for row-gap and column-gap
- if no row-gap is specified, it's set to the same value as column-gap
- gap with a single value sets both row-gap and column-gap
- gap with two values sets row-gap and column-gap separately
Keep in mind that the grid- prefix is deprecated, but the unprefixed properties are already supported in several modern browsers.
Grid Alignment and Justification
Grid alignment and justification are crucial aspects of CSS Grid Area. The justify-items property is used on a grid container to determine how grid items are spread out along a row by setting the default justify-self property for all child boxes.
You can align grid items along the inline (row) axis using justify-items, with options including start, end, center, and stretch. The value start aligns grid items to the left side of the grid area, while the value end aligns them to the right side.
Here are the possible values for justify-items:
- start
- end
- center
- stretch
The align-items property, on the other hand, aligns grid items along the block (column) axis. This property applies to all grid items inside the container and has options including start, end, center, and stretch. The value stretch fills the whole height of the cell by default.
For a quicker multi-directional centering, you can use the place-items property, which sets both the align-items and justify-items properties in a single declaration.
Justify Items
Justify Items is used on a grid container to determine how the grid items are spread out along a row by setting the default justify-self property for all child boxes. The value start aligns grid items to the left side of the grid area.
You can also use justify-items to center the grid horizontally in the grid container by setting it to center. The value stretch stretches all items to fill the grid area.
Here are the possible values for justify-items:
- start
- end
- center
- stretch
The justify-items property is useful for quickly setting the alignment of all grid items in a container. It's a shorthand way to set the justify-self property for all child boxes.
Align Content
Aligning content in a grid layout can be a bit tricky, but with the right properties, you can get it just right. The align-content property is used to align the grid along the block (column) axis.
The align-content property has several values, including start, end, center, stretch, space-around, space-between, and space-evenly. These values determine how the grid is aligned within the grid container.
To illustrate this, let's say you have a grid container with a height of 100px and a grid item with a height of 50px. If you set align-content to center, the grid item will be centered vertically within the grid container.
Here are the possible values for align-content:
- start – aligns the grid to be flush with the start edge of the grid container
- end – aligns the grid to be flush with the end edge of the grid container
- center – aligns the grid in the center of the grid container
- stretch – resizes the grid items to allow the grid to fill the full height of the grid container
- space-around – places an even amount of space between each grid item, with half-sized spaces on the far ends
- space-between – places an even amount of space between each grid item, with no space at the far ends
- space-evenly – places an even amount of space between each grid item, including the far ends
The align-content property is used in conjunction with the justify-content property to align the grid along the inline (row) axis. However, the align-content property takes precedence over justify-content.
Stacking Items
Stacking items can be achieved by positioning them across the grid, allowing for an alternative to absolute positioning.
By default, grid items stack in the source order, which means they will be arranged in the order they appear in the HTML code.
You can control their level using the z-index property, which brings the second item to the highest level in the stacking context.
Grid items can overlap each other, giving you the ability to put a caption layer on top of an image without using the position property.
Grid Auto-Flow and Auto-Size
Grid Auto-Flow and Auto-Size are two powerful features that can help you create complex layouts with ease. Grid Auto-Flow determines how grid items are automatically placed on the grid if you don't explicitly place them.
You can control the auto-placement algorithm with the grid-auto-flow property, which has three values: row, column, and dense. The default value is row.
The grid-auto-flow property only affects the visual order of your items, and it might cause them to appear out of order, which is bad for accessibility. This is why it's essential to consider the impact on accessibility when using dense.
Here are the three values of grid-auto-flow:
- row: fills in each row in turn, adding new rows as necessary
- column: fills in each column in turn, adding new columns as necessary
- dense: attempts to fill in holes earlier in the grid if smaller items come up later
If you set grid-auto-flow to row, the items will flow across the available rows, as shown in the example. If you set it to column, the items will flow down the columns.
Sources
- https://css-tricks.com/snippets/css/complete-guide-grid/
- https://www.codecademy.com/learn/learn-intermediate-css/modules/learn-css-grid/cheatsheet
- https://tutorial.techaltum.com/css-grids.html
- https://css-tricks.com/almanac/properties/g/grid-area/
- https://www.quackit.com/css/css3/properties/css_grid-area.cfm
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