Mastering CSS Grid Align Items for Responsive Design is a crucial skill for any web developer. To achieve a responsive design, you need to understand how to use the align-items property in CSS Grid.
Aligning items in CSS Grid is all about making the most of the available space. By setting the align-items property to 'center', you can vertically center the items within a grid container. For example, as shown in the article section, setting 'align-items: center' on the grid container centers the item within it.
The align-items property can also be used to justify items within a grid container. By setting it to 'space-between', you can distribute the items evenly within the grid container. This is especially useful for creating a responsive layout that adapts to different screen sizes.
Grid Container
To create a CSS Grid layout, you'll first need to define a grid container. The grid container can be any individual parent element, such as a div.
The grid container is defined by passing the display property with either a value of grid or inline-grid to an element's style block. This will implicitly convert all direct child elements of the grid container into grid items.
A grid container can be set to either grid or inline-grid, which affects its behavior. Grid makes the parent grid element act like an un-styled div, spanning the full width of a page by default. In contrast, inline-grid behaves like an un-styled span, acting like an inline element to its siblings.
To change the layout of the grid items within a grid, we must explicitly define the rows and columns we want our grid to have. This is done using the CSS properties grid-template-columns and grid-template-rows.
Grid Properties
Grid properties are a crucial part of CSS Grid, allowing you to control the layout and positioning of grid items. The grid-column and grid-row properties can be used to position grid items, making it easy to create complex layouts.
You can use the grid-row-start and grid-row-end properties to make a single grid item span multiple rows. This is done by specifying the starting row-line and the number of rows the item will span.
The grid-row-start and grid-row-end properties can also use the keyword "span" to automatically calculate the ending value from the starting value. This is a convenient feature that saves you time and effort when creating layouts.
Here are the possible values for the justify-items, align-items, justify-content, and align-content properties:
These properties can be applied to grid items in a grid container, content within a grid item, or grid items in a grid container when the grid is smaller than the space used by the container.
Template-Columns
Grid template-columns define the columns of a grid with a space-separated list of values. Each value represents the track size, and the space between them represents the grid line.
You can use a length, percentage, or the fr unit to specify the track size. The fr unit allows you to set the size of a track as a fraction of the free space of the grid container.
For example, using the fr unit, you can set each item to one third the width of the grid container: 1fr 1fr 1fr.
You can also use the repeat() notation to streamline your definition. For instance, repeat(3, 1fr) is equivalent to 1fr 1fr 1fr.
If multiple lines share the same name, they can be referenced by their line name and count.
Column-Gap
The column-gap property specifies the size of the grid lines, which is essentially setting the width of the gutters between the columns.
You can set the column-gap to a specific length value, such as 10px or 2em.
The gutters are only created between the columns, not on the outer edges.
Note that the grid-column-gap property will be removed, and it will be renamed to column-gap in the future.
Here are some examples of valid length values for the column-gap property:
- 10px
- 2em
- 5%
These values will create a specified gap between the columns in your grid.
Overview
Grid properties are a powerful tool for aligning content, and they're surprisingly easy to use. There are six properties in total: justify-items, align-items, justify-content, align-content, justify-self, and align-self.
These properties can be applied in three ways: to grid items in a grid container, to content within a grid item, or to grid items in a grid container when the grid is smaller than the space used by the container. This flexibility makes grid properties incredibly versatile.
The term "justify" pertains to row alignment (horizontal), while "align" pertains to column alignment (vertical). Understanding this distinction is key to using grid properties effectively.
Here's a breakdown of the properties:
- justify-items: aligns grid items along the inline (row) axis
- align-items: aligns grid items along the block (column) axis
- justify-content: sets the horizontal alignment of the entire grid within the inline (row) axis of the grid container
- align-content: sets the vertical alignment of the entire grid within the block (column) axis of the grid container
- justify-self: sets the horizontal alignment of an individual grid item within its cell
- align-self: sets the vertical alignment of an individual grid item within its cell
By mastering these properties, you can create complex and beautiful layouts with ease.
Column-Start
You can specify the horizontal starting position of a grid item along the column grid lines within the grid container using the grid-column-start property.
The grid-column-start property lets us specify the horizontal starting position of a grid item along the column grid lines within the grid container. This start position defines the start of the left edge of the grid item.
To set the horizontal starting position of a grid item, you can use the grid-column-start property and specify a line number or name, such as column line 2.
Using the grid layout below, let’s target the first grid item and set its horizontal starting position to column line 2. This will move the first grid item to the second vertical grid line.
From the image above, the first grid item now begins at column line 2, while the other grid items are pushed over, wrapping onto new rows or creating empty spaces on the grid.
Here are some examples of how to use the grid-column-start property:
- grid-column-start: 2; - specifies the horizontal starting position of a grid item to column line 2
- grid-column-start: span 2; - the item will span across two grid tracks
- grid-column-start: auto; - indicates auto-placement or a default span of one
Grid Items
Grid items are the individual elements within a grid container, and they can be aligned in various ways using CSS Grid properties. The align-items and justify-items properties can be set in a single declaration using the place-items shorthand property.
You can use place-items to quickly center grid items in both directions, making it a useful tool for responsive design. The first value sets align-items, and the second value sets justify-items, with the first value assigned to both properties if the second is omitted.
Grid items can also be automatically placed on the grid using the auto-placement algorithm, which is controlled by the grid-auto-flow property. This property can be set to row, column, or dense, which changes how the algorithm fills in the grid.
Template-Rows
Grid-template-rows defines the rows of the grid with a space-separated list of values.
The values represent the track size, and the space between them represents the grid line. A track-size can be a length, a percentage, or a fraction of the free space in the grid using the fr unit.
You can choose to explicitly name the lines, using the bracket syntax for the line names. A line can have more than one name, like this: row1-end and row2-start.
If your definition contains repeating parts, you can use the repeat() notation to streamline things. For example, repeat(3, 1fr) is equivalent to 1fr 1fr 1fr.
Multiple lines can share the same name and be referenced by their line name and count. The fr unit allows you to set the size of a track as a fraction of the free space of the grid container.
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.
The syntax of grid-template-areas provides a visualization of the structure of the grid. It allows you to specify the names of grid areas, repeating the name of a grid area causes the content to span those cells.
A period (.) signifies an empty cell in the grid template. You can use any number of adjacent periods to declare a single empty cell, as long as the periods have no spaces between them.
The grid-template-areas property allows the naming of sections of a webpage to use as values in the grid-row-start, grid-row-end, grid-column-start, grid-column-end, and grid-area properties.
Here are the parts of the grid template syntax:
- grid-area-name: the name of a grid area specified with grid-area
- .: a period signifies an empty grid cell
- none: no grid areas are defined
Notice that you're not naming lines with this syntax, just areas. When you use this syntax, the lines on either end of the areas are actually getting named automatically, such as the starting row line and starting column line, and the last row line and last column line.
Row
Row alignment is crucial for grid items. You can align rows using the property values start, center, end, or stretch.
The align-items property sets the alignment of all grid items in a row. It can be set to any of the property values start, center, end, or stretch.
You can also use the place-items shorthand property to set the align-items and justify-items properties in a single declaration. This is useful for quick multi-directional centering.
Here are the possible values for row alignment:
Column
Grid columns are a fundamental aspect of grid layout, and understanding how to work with them is crucial for building effective grid systems.
The grid-column property is shorthand for grid-column-start and grid-column-end, making it easier to specify a column's start and end lines.
To specify a column's start and end lines, you can use the grid-column property with a format like start-line / end-line. This format accepts the same values as the longhand version, including span.
If you don't declare an end line value, the item will span 1 track by default, which is a good thing to keep in mind when building your grid layouts.
The grid-template-columns property is used to specify the number of columns in a grid container and their widths. You can pass one or more non-negative CSS length unit values to this property.
Each value you pass to grid-template-columns represents the width of a column, and the number of values determines the number of columns in your grid container.
For example, if you use grid-template-columns with three values, you'll get a grid container with three columns.
You can't assign negative values to the CSS properties associated with grid layout, so be sure to keep that in mind when working with grid-template-columns.
Here's a quick rundown of the grid-template-columns property:
Expanding Across Multiple Lines
Grid items can span across multiple grid lines, but first, you need to understand how grid lines work. Grid lines are numbered based on their position in the grid container, with the first line being number 1.
The browser uses these grid lines to control the layout and position of items within the grid. For example, in a grid container with three columns and two rows, the column lines are numbered from 1 to 4, while the row lines are numbered from 1 to 3.
To control the position of grid items and how they span across these lines, you can use the following properties: grid-column-startgrid-column-endgrid-row-startgrid-row-end
These properties let you specify the starting and ending points of a grid item's span, allowing you to place it across multiple lines.
Block Level
CSS Grid is a two-dimensional layout system that's super powerful for building complex layouts.
To set an HTML element into a block-level grid container, you use the display: grid property/value. This makes it a block-level element.
The nested elements inside this block-level grid container are called grid items. They can be arranged in a grid pattern, with rows and columns, to create a flexible layout.
Grid items can be stretched to increase the size of the grid by using the value stretch. This can be useful for making the grid expand vertically across the container.
Sources
- https://css-tricks.com/snippets/css/complete-guide-grid/
- https://coderpad.io/blog/development/a-very-very-in-depth-guide-on-css-grid/
- http://grid-layout.com/justify-align.html
- https://www.codecademy.com/learn/premium-intermediate-css-css-grid/modules/premium-learn-css-grid/cheatsheet
- https://developer.mozilla.org/en-US/docs/Web/CSS/align-items
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