CSS Flex Container

CSS Tutorial


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CSS Advanced


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CSS Responsive

CSS Grid

CSS Flex-Container

Parent Element (Container)

This is a flex container (the blue area) consisting of three flex items:

HTML
				
					<h1>Create a Flex Container</h1>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
</div>
<p>A Flexible Layout must have a parent element with the <em>display</em> property set to <em>flex</em>.</p>
<p>Direct child elements(s) of the flexible container automatically becomes flexible items.</p>

				
			

CSS

				
					.flex-container {
  display: flex;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  margin: 10px;
  padding: 20px;
  font-size: 30px;
}
				
			

Output

Create a Flex Container
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A Flexible Layout must have a parent element with the display property set to flex.

Direct child elements(s) of the flexible container automatically becomes flexible items.

The flex-direction Property

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

HTML
				
					<p>The "flex-direction: column;" stacks the flex items vertically (from top to bottom):</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
</div>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-direction: column;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "flex-direction: column;" stacks the flex items vertically (from top to bottom):

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

HTML
				
					<p>The "flex-direction: column-reverse;" stacks the flex items vertically (but from bottom to top):</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
</div>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-direction: column-reverse;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

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

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3

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

HTML
				
					<p>The "flex-direction: row;" stacks the flex items horizontally (from left to right):</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
</div>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-direction: row;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "flex-direction: row;" stacks the flex items horizontally (from left to right):

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

HTML
				
					<p>The "flex-direction: row-reverse;" stacks the flex items horizontally (but from right to left):</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
</div>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-direction: row-reverse;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

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

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3

The flex-wrap Property

The flex-wrap property defines whether the flex items should be wrapped or not.

The below examples consist of 12 flex items, to illustrate the flex-wrap property.

The wrap value defines that the flex items will wrap if required:

HTML
				
					<h1>The flex-wrap Property</h1>

<p>The "flex-wrap: wrap;" specifies that the flex items will wrap if necessary:</p>

<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
</div>
<p>Try resizing the browser window.</p>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-wrap: wrap;
  background-color: DodgerBlue;
}
.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "flex-wrap: wrap;" specifies that the flex items will wrap if necessary:

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5
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7
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12

Try resizing the browser window.

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

HTML
				
					<p>The "flex-wrap: nowrap;" specifies that the flex items will not wrap (this is default):</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
</div>
<p>Try resizing the browser window.</p>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-wrap: nowrap;
  background-color: DodgerBlue;
}

.flex-container>div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

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

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5
6
7
8
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12

Try resizing the browser window.

The wrap-reverse value defines that the flexible items will wrap if required in reverse order:

HTML
				
					<p>The "flex-wrap: wrap-reverse;" specifies that the flex items will wrap if necessary, in reverse order:</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
</div>
<p>Try resizing the browser window.</p>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-wrap: wrap-reverse;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "flex-wrap: wrap-reverse;" specifies that the flex items will wrap if necessary, in reverse order:

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2
3
4
5
6
7
8
9
10
11
12

Try resizing the browser window.

The flex-flow Property

The flex-flow property is a shorthand property to set both the flex-direction and flex-wrap properties.

HTML
				
					<p>The flex-flow property is a shorthand property for the flex-direction and the flex-wrap properties.</p>

<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
</div
<p>Try resizing the browser window.</p>
				
			
CSS
				
					.flex-container {
  display: flex;
  flex-flow: row wrap;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

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

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7
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12
Try resizing the browser window.

The justify-content Property

The justify-content property aligns the flex items.

The center value is used to align the flex items at the center of the container.

HTML
				
					<p>The "justify-content: center;" aligns the flex items at the center of the container:</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
</div>
				
			
CSS
				
					.flex-container {
  display: flex;
  justify-content: center;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "justify-content: center;" aligns the flex items at the center of the container:

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

CSS
				
					.flex-container {
  display: flex;
  justify-content: flex-start;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "justify-content: flex-start;" aligns the flex items at the beginning of the container (this is default):

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

CSS
				
					.flex-container {
  display: flex;
  justify-content: flex-end;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}

				
			

Output

The "justify-content: flex-end;" aligns the flex items at the end of the container:

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

CSS
				
					.flex-container {
  display: flex;
  justify-content: space-around;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "justify-content: space-around;" displays the flex items with space before, between, and after the lines:

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

CSS
				
					.flex-container {
  display: flex;
  justify-content: space-between;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "justify-content: space-between;" displays the flex items with space between the lines:

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The align-items Property

The align-items property aligns the flex items.

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

CSS
				
					.flex-container {
  display: flex;
  height: 200px;
  align-items: center;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-items: center;" aligns the flex items in the middle of the container:

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The flex-start value is used to align the flex items at the top of the container:

CSS
				
					.flex-container {
  display: flex;
  height: 200px;
  align-items: flex-start;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-items: flex-start;" aligns the flex items at the top of the container:

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

CSS
				
					.flex-container {
  display: flex;
  height: 200px;
  align-items: flex-end;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-items: flex-end;" aligns the flex items at the bottom of the container:

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

CSS
				
					.flex-container {
  display: flex;
  height: 200px;
  align-items: stretch;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-items: stretch;" stretches the flex items to fill the container (this is default):

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The baseline value is used to align the flex items such as their baselines aligns:

CSS
				
					.flex-container {
  display: flex;
  height: 200px;
  align-items: baseline;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-items: baseline;" aligns the flex items such as their baselines aligns:

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The align-content Property

The align-content property aligns the flex lines.

The space-between value shows the flex lines with equal space between them.

HTML
				
					<p>The "align-content: space-between;" displays the flex lines with equal space between them:</p>
<div class="flex-container">
  <div>1</div>
  <div>2</div>
  <div>3</div>  
  <div>4</div>
  <div>5</div>
  <div>6</div>  
  <div>7</div>
  <div>8</div>
  <div>9</div>  
  <div>10</div>
  <div>11</div>
  <div>12</div>  
</div>
				
			
CSS
				
					.flex-container {
  display: flex;
  height: 300px;
  flex-wrap: wrap;
  align-content: space-between;
  overflow: scroll;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-content: space-between;" displays the flex lines with equal space between them:

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

CSS
				
					.flex-container {
  display: flex;
  height: 300px;
  flex-wrap: wrap;
  align-content: space-between;
  overflow: scroll;
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-content: space-around;" displays the flex lines with space before, between, and after them:

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

CSS
				
					.flex-container {
  display: flex;
  height: 600px;
  flex-wrap: wrap;
  align-content: stretch;
  overflow: scroll;  
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-content: stretch;" stretches the flex lines to take up the remaining space (this is default):

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The center value displays  shows the flex lines in the middle of the container.

CSS
				
					.flex-container {
  display: flex;
  height: 400px;
  flex-wrap: wrap;
  align-content: center;
  overflow: scroll;  
  background-color: DodgerBlue;
}

.flex-container > div {
  background-color: #f1f1f1;
  width: 100px;
  margin: 10px;
  text-align: center;
  line-height: 75px;
  font-size: 30px;
}
				
			

Output

The "align-content: center;" displays the flex lines in the middle of the container:

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Perfect Centering

In the example below very common style problem: perfect centering is solved.

HTML
				
					<h6>Perfect Centering</h6>
<p>A flex container with both the justify-content and the align-items properties set to <em>center</em> will align the item(s) in the center (in both axis).</p>
<div class="flex-container">
  <div></div>
</div>
				
			
CSS
				
					.flex-container {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 300px;
  background-color: DodgerBlue;
}

.flex-container>div {
  background-color: #f1f1f1;
  color: white;
  width: 100px;
  height: 100px;
}
				
			

Output

Perfect Centering

A flex container with both the justify-content and the align-items properties set to center will align the item(s) in the center (in both axis).


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