CSS Flexbox Container

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CSS Flexbox Container

2024-07-11 14:20| 来源: 网络整理| 查看: 265

CSS Flex Container ❮ Previous Next ❯ Parent Element (Container)

Like we specified in the previous chapter, this is a flex container (the blue area) with three flex items:

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The flex container becomes flexible by setting the display property to flex:

Example .flex-container { display: flex;}

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The flex container properties are:

flex-direction flex-wrap flex-flow justify-content align-items align-content The flex-direction Property

The flex-direction property defines in which direction the container wants to stack the flex items.

1 2 3 Example

The column value stacks the flex items vertically (from top to bottom):

.flex-container { display: flex; flex-direction: column;}

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Example

The column-reverse value stacks the flex items vertically (but from bottom to top):

.flex-container { display: flex; flex-direction: column-reverse;}

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Example

The row value stacks the flex items horizontally (from left to right):

.flex-container { display: flex; flex-direction: row;}

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Example

The row-reverse value stacks the flex items horizontally (but from right to left):

.flex-container { display: flex; flex-direction: row-reverse;}

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The flex-wrap Property

The flex-wrap property specifies whether the flex items should wrap or not.

The examples below have 12 flex items, to better demonstrate the flex-wrap property.

1 2 3 4 5 6 7 8 9 10 11 12 Example

The wrap value specifies that the flex items will wrap if necessary:

.flex-container { display: flex; flex-wrap: wrap;}

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Example

The nowrap value specifies that the flex items will not wrap (this is default):

.flex-container { display: flex; flex-wrap: nowrap;}

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Example

The wrap-reverse value specifies that the flexible items will wrap if necessary, in reverse order:

.flex-container { display: flex; flex-wrap: wrap-reverse;}

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The flex-flow Property

The flex-flow property is a shorthand property for setting both the flex-direction and flex-wrap properties.

Example .flex-container { display: flex; flex-flow: row wrap;}

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The justify-content Property

The justify-content property is used to align the flex items:

1 2 3 Example

The center value aligns the flex items at the center of the container:

.flex-container { display: flex; justify-content: center;}

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Example

The flex-start value aligns the flex items at the beginning of the container (this is default):

.flex-container { display: flex; justify-content: flex-start;}

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Example

The flex-end value aligns the flex items at the end of the container:

.flex-container { display: flex; justify-content: flex-end;}

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Example

The space-around value displays the flex items with space before, between, and after the lines:

.flex-container { display: flex; justify-content: space-around;}

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Example

The space-between value displays the flex items with space between the lines:

.flex-container { display: flex; justify-content: space-between;}

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The align-items Property

The align-items property is used to align the flex items.

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In these examples we use a 200 pixels high container, to better demonstrate the align-items property.

Example

The center value aligns the flex items in the middle of the container:

.flex-container { display: flex; height: 200px; align-items: center;}

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Example

The flex-start value aligns the flex items at the top of the container:

.flex-container { display: flex; height: 200px; align-items: flex-start;}

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Example

The flex-end value aligns the flex items at the bottom of the container:

.flex-container { display: flex; height: 200px; align-items: flex-end;}

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Example

The stretch value stretches the flex items to fill the container (this is default):

.flex-container { display: flex; height: 200px; align-items: stretch;}

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Example

The baseline value aligns the flex items such as their baselines aligns:

.flex-container { display: flex; height: 200px; align-items: baseline;}

Note: the example uses different font-size to demonstrate that the items gets aligned by the text baseline:

1 2 3 4

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The align-content Property

The align-content property is used to align the flex lines.

1 2 3 4 5 6 7 8 9 10 11 12

In these examples we use a 600 pixels high container, with the flex-wrap property set to wrap, to better demonstrate the align-content property.

Example

The space-between value displays the flex lines with equal space between them:

.flex-container { display: flex; height: 600px; flex-wrap: wrap; align-content: space-between; }

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Example

The space-around value displays the flex lines with space before, between, and after them:

.flex-container { display: flex; height: 600px; flex-wrap: wrap; align-content: space-around; }

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Example

The stretch value stretches the flex lines to take up the remaining space (this is default):

.flex-container { display: flex; height: 600px; flex-wrap: wrap; align-content: stretch; }

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Example

The center value displays the flex lines in the middle of the container:

.flex-container { display: flex; height: 600px; flex-wrap: wrap; align-content: center; }

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Example

The flex-start value displays the flex lines at the start of the container:

.flex-container { display: flex; height: 600px; flex-wrap: wrap; align-content: flex-start; }

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Example

The flex-end value displays the flex lines at the end of the container:

.flex-container { display: flex; height: 600px; flex-wrap: wrap; align-content: flex-end; }

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Perfect Centering

In the following example we will solve a very common style problem: perfect centering.

SOLUTION: Set both the justify-content and align-items properties to center, and the flex item will be perfectly centered:

Example .flex-container { display: flex; height: 300px; justify-content: center; align-items: center;}

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The CSS Flexbox Container Properties

The following table lists all the CSS Flexbox Container properties:

Property Description align-content Modifies the behavior of the flex-wrap property. It is similar to align-items, but instead of aligning flex items, it aligns flex lines align-items Vertically aligns the flex items when the items do not use all available space on the cross-axis display Specifies the type of box used for an HTML element flex-direction Specifies the direction of the flexible items inside a flex container flex-flow A shorthand property for flex-direction and flex-wrap flex-wrap Specifies whether the flex items should wrap or not, if there is not enough room for them on one flex line justify-content Horizontally aligns the flex items when the items do not use all available space on the main-axis ❮ Previous Next ❯ ★ +1 W3schools Pathfinder Track your progress - it's free! Log in Sign Up

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