Center only one of two elements in a div? [duplicate] - html

This question already has answers here:
Center and bottom-align flex items
(3 answers)
Closed 5 years ago.
I have a simple webpage with a .topnav bar and a .container with a few elements in it. I am trying to center just the .container, not .topnav, within the body of the page so that it will be vertically centered. However, when I've tried styling body with:
display:flex;
align-items:center;
justify-content:center;
Both the .topbar and .container are centered. How do I go about centering just the .container vertically?
body,
html {
height: 100%;
}
.contact_box {
text-align: center;
background-color: red;
border: 1px solid #c0c0c0;
border-radius: 5px;
height: 20em;
width: 25em;
box-shadow: 1px 1px 6px #757677;
float: left;
}
.contact_box img {
margin-top: 3.3em;
margin-bottom: 1.2em;
height: 3em;
width: 3em;
}
.contact_box h3 {
color: #6d6d6d;
}
#contact .container {
display: flex;
align-items: center;
justify-content: center;
}
<body id="contact">
<div class="topnav" id="myTopnav">
Home
About
Contact
<a class="icon" onclick="myFunction()">☰</a>
</div>
<div class="container">
<div class="row" id="contact_section">
<div class="contact_box" class="col-md-4">
<img src="resources/github_logo.png" alt="Github">
<br>
<h3>GitHub</h3>
</div>
<div class="contact_box" class="col-md-4">
<img src="resources/linkedin_logo.png" alt="LinkedIn">
<h3>LinkedIn</h3>
</div>
<div class="contact_box" class="col-md-4">
<img src="resources/email_icon.png" alt="EMAIL">
<h3>Email</h3>
</div>
</div>
</div>
</body>
Here's how it looks now:


Hi to align it vertically in the middle of the page, set the height of the container to be 100% of the viewport:
#contact .container {
height:100vh;
display:flex;
align-items:center;
justify-content:center;
}


I think I see what you're looking for:
header at the top of the page and body below, with body contents centered vertically.
There are three flex systems in my example below:
The first sets up <body> as a vertical flex container with two items: .topnav and .container. The items are justified to the start of the flex container with justify-content: flex-start (this is the default anyway) and .container is allowed to grow to fill the flex container with flex-grow:1.
The second sets up .container as a vertical flex container with each .row as an item. Items are centered vertically and horizontally with justify-content: center and align-items: center, respectively.
The third sets up .row elements as horizontal flex containers (flex-direction: row is the default), with each .contact_box as an item. Items are centered horizontally with justify-content: center.
html {
height: 100%;
}
body {
margin: 0;
min-height: 100%;
display: flex;
flex-direction: column;
justify-content: flex-start;
}
.container {
flex-grow: 1;
display: flex;
flex-direction: column;
justify-content: center;
align-items: center;
}
.row {
display: flex;
flex-direction: row;
justify-content: center;
}
.contact_box {
background-color: red;
border: 1px solid #c0c0c0;
border-radius: .5em;
box-shadow: 1px 1px 6px #757677;
padding: 1em 2em;
text-align: center;
}
.contact_box h3 {
margin: .25em 0 0;
}
<div class="topnav">
Home
About
Contact
<a class="icon">☰</a>
</div>
<div class="container">
<div class="row">
<div class="contact_box">
<img src="resources/github_logo.png" alt="Github">
<br>
<h3>GitHub</h3>
</div>
<div class="contact_box">
<img src="resources/linkedin_logo.png" alt="LinkedIn">
<h3>LinkedIn</h3>
</div>
<div class="contact_box">
<img src="resources/email_icon.png" alt="EMAIL">
<h3>Email</h3>
</div>
</div>
</div>
Like this, with each flex system a different color:
And if you added another .row, it might look like this:

Related

Vertically align multi-paragraph text within a div [duplicate]

How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
http://codepen.io/anon/pen/zLxBo

I think you want something like the following.
html, body {
height: 100%;
}
body {
margin: 0;
}
.flex-container {
height: 100%;
padding: 0;
margin: 0;
display: flex;
align-items: center;
justify-content: center;
}
.row {
width: auto;
border: 1px solid blue;
}
.flex-item {
background-color: tomato;
padding: 5px;
width: 20px;
height: 20px;
margin: 10px;
line-height: 20px;
color: white;
font-weight: bold;
font-size: 2em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<div class="flex-item">1</div>
<div class="flex-item">2</div>
<div class="flex-item">3</div>
<div class="flex-item">4</div>
</div>
</div>
See demo at: http://jsfiddle.net/audetwebdesign/tFscL/
Your .flex-item elements should be block level (div instead of span) if you want the height and top/bottom padding to work properly.
Also, on .row, set the width to auto instead of 100%.
Your .flex-container properties are fine.
If you want the .row to be centered vertically in the view port, assign 100% height to html and body, and also zero out the body margins.
Note that .flex-container needs a height to see the vertical alignment effect, otherwise, the container computes the minimum height needed to enclose the content, which is less than the view port height in this example.
Footnote:
The flex-flow, flex-direction, flex-wrap properties could have made this design easier to implement. I think that the .row container is not needed unless you want to add some styling around the elements (background image, borders and so on).
A useful resource is: http://demo.agektmr.com/flexbox/

How to Center Elements Vertically and Horizontally in Flexbox
Below are two general centering solutions.
One for vertically-aligned flex items (flex-direction: column) and the other for horizontally-aligned flex items (flex-direction: row).
In both cases the height of the centered divs can be variable, undefined, unknown, whatever. The height of the centered divs doesn't matter.
Here's the HTML for both:
<div id="container"><!-- flex container -->
<div class="box" id="bluebox"><!-- flex item -->
<p>DIV #1</p>
</div>
<div class="box" id="redbox"><!-- flex item -->
<p>DIV #2</p>
</div>
</div>
CSS (excluding decorative styles)
When flex items are stacked vertically:
#container {
display: flex; /* establish flex container */
flex-direction: column; /* make main axis vertical */
justify-content: center; /* center items vertically, in this case */
align-items: center; /* center items horizontally, in this case */
height: 300px;
}
.box {
width: 300px;
margin: 5px;
text-align: center; /* will center text in <p>, which is not a flex item */
}
DEMO
When flex items are stacked horizontally:
Adjust the flex-direction rule from the code above.
#container {
display: flex;
flex-direction: row; /* make main axis horizontal (default setting) */
justify-content: center; /* center items horizontally, in this case */
align-items: center; /* center items vertically, in this case */
height: 300px;
}
DEMO
Centering the content of the flex items
The scope of a flex formatting context is limited to a parent-child relationship. Descendants of a flex container beyond the children do not participate in flex layout and will ignore flex properties. Essentially, flex properties are not inheritable beyond the children.
Hence, you will always need to apply display: flex or display: inline-flex to a parent element in order to apply flex properties to the child.
In order to vertically and/or horizontally center text or other content contained in a flex item, make the item a (nested) flex container, and repeat the centering rules.
.box {
display: flex;
justify-content: center;
align-items: center; /* for single line flex container */
align-content: center; /* for multi-line flex container */
}
More details here: How to vertically align text inside a flexbox?
Alternatively, you can apply margin: auto to the content element of the flex item.
p { margin: auto; }
Learn about flex auto margins here: Methods for Aligning Flex Items (see box#56).
Centering multiple lines of flex items
When a flex container has multiple lines (due to wrapping) the align-content property will be necessary for cross-axis alignment.
From the spec:
8.4. Packing Flex Lines: the align-content
property
The align-content property aligns a flex container’s lines within the
flex container when there is extra space in the cross-axis, similar to
how justify-content aligns individual items within the main-axis.
Note, this property has no effect on a single-line flex container.
More details here: How does flex-wrap work with align-self, align-items and align-content?
Browser support
Flexbox is supported by all major browsers, except IE < 10. Some recent browser versions, such as Safari 8 and IE10, require vendor prefixes. For a quick way to add prefixes use Autoprefixer. More details in this answer.
Centering solution for older browsers
For an alternative centering solution using CSS table and positioning properties see this answer: https://stackoverflow.com/a/31977476/3597276

Add
.container {
display: flex;
justify-content: center;
align-items: center;
}
to the container element of whatever you want to center. Documentation:
justify-content and
align-items.

You can make use of
display: flex;
align-items: center;
justify-content: center;
on your parent component

Don't forgot to use important browsers specific attributes:
align-items: center; -->
-webkit-box-align: center;
-moz-box-align: center;
-ms-flex-align: center;
-webkit-align-items: center;
align-items: center;
justify-content: center; -->
-webkit-box-pack: center;
-moz-box-pack: center;
-ms-flex-pack: center;
-webkit-justify-content: center;
justify-content: center;
You could read this two links for better understanding flex:
http://css-tricks.com/almanac/properties/j/justify-content/ and
http://ptb2.me/flexbox/
Good Luck.

Use this:
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
for some HTML markup like this:
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>

1 - Set CSS on parent div to display: flex;
2 - Set CSS on parent div to flex-direction: column; Note that this will make all content within that div line up top to bottom. This will work best if the parent div only contains the child and nothing else.
3 - Set CSS on parent div to justify-content: center;
Here is an example of what the CSS will look like:
.parentDivClass {
display: flex;
flex-direction: column;
justify-content: center;
}

diplay: flex; for it's container and margin:auto; for it's item works perfect.
NOTE: You have to setup the width and height to see the effect.
#container{
width: 100%; /*width needs to be setup*/
height: 150px; /*height needs to be setup*/
display: flex;
}
.item{
margin: auto; /*These will make the item in center*/
background-color: #CCC;
}
<div id="container">
<div class="item">CENTER</div>
</div>

margin: auto works "perfectly" with flexbox i.e. it allows to center item vertically and horizontally.
html, body {
height: 100%;
max-height: 100%;
}
.flex-container {
display: flex;
height: 100%;
background-color: green;
}
.container {
display: flex;
margin: auto;
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS</title>
</head>
<body>
<div class="flex-container">
<div class="container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
</body>
</html>

If you need to center a text in a link this will do the trick:
div {
display: flex;
width: 200px;
height: 80px;
background-color: yellow;
}
a {
display: flex;
align-items: center;
justify-content: center;
text-align: center; /* only important for multiple lines */
padding: 0 20px;
background-color: silver;
border: 2px solid blue;
}
<div>
text
text with two lines
</div>

RESULT:
CODE
HTML:
<div class="flex-container">
<div class="rows">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
CSS:
html, body {
height: 100%;
}
.flex-container {
display: flex;
justify-content: center;
align-items: center;
height: 100%;
}
.rows {
display: flex;
flex-direction: column;
}
where flex-container div is used to center vertically and horizontally your rows div, and rows div is used to group your "items" and ordering them in a column based one.

You can add flex-direction:column to flex-container
.flex-container {
flex-direction: column;
}
Add display:inline-block to flex-item
.flex-item {
display: inline-block;
}
because you added width and height has no effect on this element since it has a display of inline. Try adding display:inline-block or display:block. Learn more about width and height.
Also add to row class( you are given row{} not taken as style)
.row{
width:100%;
margin:0 auto;
text-align:center;
}
Working Demo in Row :
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content:center;
flex-direction:column;
}
.row{
width:100%;
margin:0 auto;
text-align:center;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
Working Demo in Column :
.flex-container {
padding: 0;
margin: 0;
width: 100%;
list-style: none;
display: flex;
align-items: center;
}
.row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>

Hope this will help.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}

Using CSS+
<div class="EXTENDER">
<div class="PADDER-CENTER">
<div contentEditable="true">Edit this text...</div>
</div>
</div>
take a look HERE

Trying to left-align text in a centered element

I am trying to achieve what you see at the bottom of the panel in the image below. Each of the 3 items are centered but the text is left aligned.
I have developed the following basic CSS and HTML code. I am trying to use flexbox as much as possible for responsive layout. Anyone have any pure HTML/CSS solution?
I understand that the p tag is a block level element. So what are my options without setting the width of the p tag? Or maybe there is another tag I could use?
The HTML and CSS code I have provided below has the basic structure only.
.panel {
display: flex;
border: 1px solid black;
min-height: 300px;
flex-direction: column;
max-width: 500px;
}
.panel-body {
display: flex;
flex: 1;
flex-flow: row wrap;
justify-content: center;
}
.panel-heading {
padding: 10px 10px;
}
.panel-body div.chart {
flex: 0 0 100%;
min-height: 150px;
background-color: green;
}
.panel-body div {
text-align: center;
flex: auto;
background-color: red;
display: flex;
flex-direction: column;
justify-content: space-around;
}
p {
border: 0;
padding: 0;
margin: 0;
text-align: left;
}
<div class="panel">
<div class="panel-heading">
HEADING
</div>
<div class="panel-body">
<div class="chart"></div>
<div>
<p>HIGH
<br/>144</p>
</div>
<div>MEDIUM
<br/>2</div>
<div>LOW
<br/>3</div>
</div>
</div>

Just changed styles of .panel-body div. Also there is no need for p tag here, consider removing it from markup. Demo:
.panel {
display: flex;
border: 1px solid black;
min-height: 300px;
flex-direction: column;
max-width: 500px;
}
.panel-body {
display: flex;
flex: 1;
flex-flow: row wrap;
justify-content: center;
}
.panel-heading {
padding: 10px 10px;
}
.panel-body div.chart {
flex: 0 0 100%;
min-height: 150px;
background-color: green;
}
.panel-body div {
/* Take 33.33% width, allow grow and shrink */
flex: 1 1 33.33%;
background-color: red;
/* become a flex-container */
display: flex;
/* align flex-items vertically */
flex-direction: column;
/* center vertically */
justify-content: center;
/* center horizontally */
align-items: center;
}
p {
border: 0;
padding: 0;
margin: 0;
text-align: left;
}
<div class="panel">
<div class="panel-heading">
HEADING
</div>
<div class="panel-body">
<div class="chart"></div>
<div>
<p>HIGH
<br/>144</p>
</div>
<div>MEDIUM
<br/>2</div>
<div>LOW
<br/>3</div>
</div>
</div>

Try this HTML code:
<div class="panel">
<div class="panel-heading">
HEADING
</div>
<div class="panel-body">
<div class="chart"></div>
<div><p>HIGH<br/>144</p></div>
<div><p>MEDIUM<br/>2</p></div>
<div><p>LOW<br/>3</p></div>
</div>
</div>
It appears that you originally only put the div containing "HIGH" and "144" in a <p> tag, which, according to your css code, is the attribute that is being styled to have left-aligned text. However, the content within the other 2 <div>s were not enclosed within a <p> tag, and so they were not being styled.

How to centre div vertically and horizontally inside another div when using display: flex? [duplicate]

How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
http://codepen.io/anon/pen/zLxBo

I think you want something like the following.
html, body {
height: 100%;
}
body {
margin: 0;
}
.flex-container {
height: 100%;
padding: 0;
margin: 0;
display: flex;
align-items: center;
justify-content: center;
}
.row {
width: auto;
border: 1px solid blue;
}
.flex-item {
background-color: tomato;
padding: 5px;
width: 20px;
height: 20px;
margin: 10px;
line-height: 20px;
color: white;
font-weight: bold;
font-size: 2em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<div class="flex-item">1</div>
<div class="flex-item">2</div>
<div class="flex-item">3</div>
<div class="flex-item">4</div>
</div>
</div>
See demo at: http://jsfiddle.net/audetwebdesign/tFscL/
Your .flex-item elements should be block level (div instead of span) if you want the height and top/bottom padding to work properly.
Also, on .row, set the width to auto instead of 100%.
Your .flex-container properties are fine.
If you want the .row to be centered vertically in the view port, assign 100% height to html and body, and also zero out the body margins.
Note that .flex-container needs a height to see the vertical alignment effect, otherwise, the container computes the minimum height needed to enclose the content, which is less than the view port height in this example.
Footnote:
The flex-flow, flex-direction, flex-wrap properties could have made this design easier to implement. I think that the .row container is not needed unless you want to add some styling around the elements (background image, borders and so on).
A useful resource is: http://demo.agektmr.com/flexbox/

How to Center Elements Vertically and Horizontally in Flexbox
Below are two general centering solutions.
One for vertically-aligned flex items (flex-direction: column) and the other for horizontally-aligned flex items (flex-direction: row).
In both cases the height of the centered divs can be variable, undefined, unknown, whatever. The height of the centered divs doesn't matter.
Here's the HTML for both:
<div id="container"><!-- flex container -->
<div class="box" id="bluebox"><!-- flex item -->
<p>DIV #1</p>
</div>
<div class="box" id="redbox"><!-- flex item -->
<p>DIV #2</p>
</div>
</div>
CSS (excluding decorative styles)
When flex items are stacked vertically:
#container {
display: flex; /* establish flex container */
flex-direction: column; /* make main axis vertical */
justify-content: center; /* center items vertically, in this case */
align-items: center; /* center items horizontally, in this case */
height: 300px;
}
.box {
width: 300px;
margin: 5px;
text-align: center; /* will center text in <p>, which is not a flex item */
}
DEMO
When flex items are stacked horizontally:
Adjust the flex-direction rule from the code above.
#container {
display: flex;
flex-direction: row; /* make main axis horizontal (default setting) */
justify-content: center; /* center items horizontally, in this case */
align-items: center; /* center items vertically, in this case */
height: 300px;
}
DEMO
Centering the content of the flex items
The scope of a flex formatting context is limited to a parent-child relationship. Descendants of a flex container beyond the children do not participate in flex layout and will ignore flex properties. Essentially, flex properties are not inheritable beyond the children.
Hence, you will always need to apply display: flex or display: inline-flex to a parent element in order to apply flex properties to the child.
In order to vertically and/or horizontally center text or other content contained in a flex item, make the item a (nested) flex container, and repeat the centering rules.
.box {
display: flex;
justify-content: center;
align-items: center; /* for single line flex container */
align-content: center; /* for multi-line flex container */
}
More details here: How to vertically align text inside a flexbox?
Alternatively, you can apply margin: auto to the content element of the flex item.
p { margin: auto; }
Learn about flex auto margins here: Methods for Aligning Flex Items (see box#56).
Centering multiple lines of flex items
When a flex container has multiple lines (due to wrapping) the align-content property will be necessary for cross-axis alignment.
From the spec:
8.4. Packing Flex Lines: the align-content
property
The align-content property aligns a flex container’s lines within the
flex container when there is extra space in the cross-axis, similar to
how justify-content aligns individual items within the main-axis.
Note, this property has no effect on a single-line flex container.
More details here: How does flex-wrap work with align-self, align-items and align-content?
Browser support
Flexbox is supported by all major browsers, except IE < 10. Some recent browser versions, such as Safari 8 and IE10, require vendor prefixes. For a quick way to add prefixes use Autoprefixer. More details in this answer.
Centering solution for older browsers
For an alternative centering solution using CSS table and positioning properties see this answer: https://stackoverflow.com/a/31977476/3597276

Add
.container {
display: flex;
justify-content: center;
align-items: center;
}
to the container element of whatever you want to center. Documentation:
justify-content and
align-items.

You can make use of
display: flex;
align-items: center;
justify-content: center;
on your parent component

Don't forgot to use important browsers specific attributes:
align-items: center; -->
-webkit-box-align: center;
-moz-box-align: center;
-ms-flex-align: center;
-webkit-align-items: center;
align-items: center;
justify-content: center; -->
-webkit-box-pack: center;
-moz-box-pack: center;
-ms-flex-pack: center;
-webkit-justify-content: center;
justify-content: center;
You could read this two links for better understanding flex:
http://css-tricks.com/almanac/properties/j/justify-content/ and
http://ptb2.me/flexbox/
Good Luck.

Use this:
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
for some HTML markup like this:
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>

1 - Set CSS on parent div to display: flex;
2 - Set CSS on parent div to flex-direction: column; Note that this will make all content within that div line up top to bottom. This will work best if the parent div only contains the child and nothing else.
3 - Set CSS on parent div to justify-content: center;
Here is an example of what the CSS will look like:
.parentDivClass {
display: flex;
flex-direction: column;
justify-content: center;
}

diplay: flex; for it's container and margin:auto; for it's item works perfect.
NOTE: You have to setup the width and height to see the effect.
#container{
width: 100%; /*width needs to be setup*/
height: 150px; /*height needs to be setup*/
display: flex;
}
.item{
margin: auto; /*These will make the item in center*/
background-color: #CCC;
}
<div id="container">
<div class="item">CENTER</div>
</div>

margin: auto works "perfectly" with flexbox i.e. it allows to center item vertically and horizontally.
html, body {
height: 100%;
max-height: 100%;
}
.flex-container {
display: flex;
height: 100%;
background-color: green;
}
.container {
display: flex;
margin: auto;
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS</title>
</head>
<body>
<div class="flex-container">
<div class="container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
</body>
</html>

If you need to center a text in a link this will do the trick:
div {
display: flex;
width: 200px;
height: 80px;
background-color: yellow;
}
a {
display: flex;
align-items: center;
justify-content: center;
text-align: center; /* only important for multiple lines */
padding: 0 20px;
background-color: silver;
border: 2px solid blue;
}
<div>
text
text with two lines
</div>

RESULT:
CODE
HTML:
<div class="flex-container">
<div class="rows">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
CSS:
html, body {
height: 100%;
}
.flex-container {
display: flex;
justify-content: center;
align-items: center;
height: 100%;
}
.rows {
display: flex;
flex-direction: column;
}
where flex-container div is used to center vertically and horizontally your rows div, and rows div is used to group your "items" and ordering them in a column based one.

You can add flex-direction:column to flex-container
.flex-container {
flex-direction: column;
}
Add display:inline-block to flex-item
.flex-item {
display: inline-block;
}
because you added width and height has no effect on this element since it has a display of inline. Try adding display:inline-block or display:block. Learn more about width and height.
Also add to row class( you are given row{} not taken as style)
.row{
width:100%;
margin:0 auto;
text-align:center;
}
Working Demo in Row :
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content:center;
flex-direction:column;
}
.row{
width:100%;
margin:0 auto;
text-align:center;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
Working Demo in Column :
.flex-container {
padding: 0;
margin: 0;
width: 100%;
list-style: none;
display: flex;
align-items: center;
}
.row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>

Hope this will help.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}

Using CSS+
<div class="EXTENDER">
<div class="PADDER-CENTER">
<div contentEditable="true">Edit this text...</div>
</div>
</div>
take a look HERE

CSS Vertically align content in the center of a div [duplicate]

How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
http://codepen.io/anon/pen/zLxBo

I think you want something like the following.
html, body {
height: 100%;
}
body {
margin: 0;
}
.flex-container {
height: 100%;
padding: 0;
margin: 0;
display: flex;
align-items: center;
justify-content: center;
}
.row {
width: auto;
border: 1px solid blue;
}
.flex-item {
background-color: tomato;
padding: 5px;
width: 20px;
height: 20px;
margin: 10px;
line-height: 20px;
color: white;
font-weight: bold;
font-size: 2em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<div class="flex-item">1</div>
<div class="flex-item">2</div>
<div class="flex-item">3</div>
<div class="flex-item">4</div>
</div>
</div>
See demo at: http://jsfiddle.net/audetwebdesign/tFscL/
Your .flex-item elements should be block level (div instead of span) if you want the height and top/bottom padding to work properly.
Also, on .row, set the width to auto instead of 100%.
Your .flex-container properties are fine.
If you want the .row to be centered vertically in the view port, assign 100% height to html and body, and also zero out the body margins.
Note that .flex-container needs a height to see the vertical alignment effect, otherwise, the container computes the minimum height needed to enclose the content, which is less than the view port height in this example.
Footnote:
The flex-flow, flex-direction, flex-wrap properties could have made this design easier to implement. I think that the .row container is not needed unless you want to add some styling around the elements (background image, borders and so on).
A useful resource is: http://demo.agektmr.com/flexbox/

How to Center Elements Vertically and Horizontally in Flexbox
Below are two general centering solutions.
One for vertically-aligned flex items (flex-direction: column) and the other for horizontally-aligned flex items (flex-direction: row).
In both cases the height of the centered divs can be variable, undefined, unknown, whatever. The height of the centered divs doesn't matter.
Here's the HTML for both:
<div id="container"><!-- flex container -->
<div class="box" id="bluebox"><!-- flex item -->
<p>DIV #1</p>
</div>
<div class="box" id="redbox"><!-- flex item -->
<p>DIV #2</p>
</div>
</div>
CSS (excluding decorative styles)
When flex items are stacked vertically:
#container {
display: flex; /* establish flex container */
flex-direction: column; /* make main axis vertical */
justify-content: center; /* center items vertically, in this case */
align-items: center; /* center items horizontally, in this case */
height: 300px;
}
.box {
width: 300px;
margin: 5px;
text-align: center; /* will center text in <p>, which is not a flex item */
}
DEMO
When flex items are stacked horizontally:
Adjust the flex-direction rule from the code above.
#container {
display: flex;
flex-direction: row; /* make main axis horizontal (default setting) */
justify-content: center; /* center items horizontally, in this case */
align-items: center; /* center items vertically, in this case */
height: 300px;
}
DEMO
Centering the content of the flex items
The scope of a flex formatting context is limited to a parent-child relationship. Descendants of a flex container beyond the children do not participate in flex layout and will ignore flex properties. Essentially, flex properties are not inheritable beyond the children.
Hence, you will always need to apply display: flex or display: inline-flex to a parent element in order to apply flex properties to the child.
In order to vertically and/or horizontally center text or other content contained in a flex item, make the item a (nested) flex container, and repeat the centering rules.
.box {
display: flex;
justify-content: center;
align-items: center; /* for single line flex container */
align-content: center; /* for multi-line flex container */
}
More details here: How to vertically align text inside a flexbox?
Alternatively, you can apply margin: auto to the content element of the flex item.
p { margin: auto; }
Learn about flex auto margins here: Methods for Aligning Flex Items (see box#56).
Centering multiple lines of flex items
When a flex container has multiple lines (due to wrapping) the align-content property will be necessary for cross-axis alignment.
From the spec:
8.4. Packing Flex Lines: the align-content
property
The align-content property aligns a flex container’s lines within the
flex container when there is extra space in the cross-axis, similar to
how justify-content aligns individual items within the main-axis.
Note, this property has no effect on a single-line flex container.
More details here: How does flex-wrap work with align-self, align-items and align-content?
Browser support
Flexbox is supported by all major browsers, except IE < 10. Some recent browser versions, such as Safari 8 and IE10, require vendor prefixes. For a quick way to add prefixes use Autoprefixer. More details in this answer.
Centering solution for older browsers
For an alternative centering solution using CSS table and positioning properties see this answer: https://stackoverflow.com/a/31977476/3597276

Add
.container {
display: flex;
justify-content: center;
align-items: center;
}
to the container element of whatever you want to center. Documentation:
justify-content and
align-items.

You can make use of
display: flex;
align-items: center;
justify-content: center;
on your parent component

Don't forgot to use important browsers specific attributes:
align-items: center; -->
-webkit-box-align: center;
-moz-box-align: center;
-ms-flex-align: center;
-webkit-align-items: center;
align-items: center;
justify-content: center; -->
-webkit-box-pack: center;
-moz-box-pack: center;
-ms-flex-pack: center;
-webkit-justify-content: center;
justify-content: center;
You could read this two links for better understanding flex:
http://css-tricks.com/almanac/properties/j/justify-content/ and
http://ptb2.me/flexbox/
Good Luck.

Use this:
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
for some HTML markup like this:
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>

1 - Set CSS on parent div to display: flex;
2 - Set CSS on parent div to flex-direction: column; Note that this will make all content within that div line up top to bottom. This will work best if the parent div only contains the child and nothing else.
3 - Set CSS on parent div to justify-content: center;
Here is an example of what the CSS will look like:
.parentDivClass {
display: flex;
flex-direction: column;
justify-content: center;
}

diplay: flex; for it's container and margin:auto; for it's item works perfect.
NOTE: You have to setup the width and height to see the effect.
#container{
width: 100%; /*width needs to be setup*/
height: 150px; /*height needs to be setup*/
display: flex;
}
.item{
margin: auto; /*These will make the item in center*/
background-color: #CCC;
}
<div id="container">
<div class="item">CENTER</div>
</div>

margin: auto works "perfectly" with flexbox i.e. it allows to center item vertically and horizontally.
html, body {
height: 100%;
max-height: 100%;
}
.flex-container {
display: flex;
height: 100%;
background-color: green;
}
.container {
display: flex;
margin: auto;
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS</title>
</head>
<body>
<div class="flex-container">
<div class="container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
</body>
</html>

If you need to center a text in a link this will do the trick:
div {
display: flex;
width: 200px;
height: 80px;
background-color: yellow;
}
a {
display: flex;
align-items: center;
justify-content: center;
text-align: center; /* only important for multiple lines */
padding: 0 20px;
background-color: silver;
border: 2px solid blue;
}
<div>
text
text with two lines
</div>

RESULT:
CODE
HTML:
<div class="flex-container">
<div class="rows">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
CSS:
html, body {
height: 100%;
}
.flex-container {
display: flex;
justify-content: center;
align-items: center;
height: 100%;
}
.rows {
display: flex;
flex-direction: column;
}
where flex-container div is used to center vertically and horizontally your rows div, and rows div is used to group your "items" and ordering them in a column based one.

You can add flex-direction:column to flex-container
.flex-container {
flex-direction: column;
}
Add display:inline-block to flex-item
.flex-item {
display: inline-block;
}
because you added width and height has no effect on this element since it has a display of inline. Try adding display:inline-block or display:block. Learn more about width and height.
Also add to row class( you are given row{} not taken as style)
.row{
width:100%;
margin:0 auto;
text-align:center;
}
Working Demo in Row :
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content:center;
flex-direction:column;
}
.row{
width:100%;
margin:0 auto;
text-align:center;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
Working Demo in Column :
.flex-container {
padding: 0;
margin: 0;
width: 100%;
list-style: none;
display: flex;
align-items: center;
}
.row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>

Hope this will help.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}

Using CSS+
<div class="EXTENDER">
<div class="PADDER-CENTER">
<div contentEditable="true">Edit this text...</div>
</div>
</div>
take a look HERE

Flexbox: center horizontally and vertically

How to center div horizontally, and vertically within the container using flexbox. In below example, I want each number below each other (in rows), which are centered horizontally.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
http://codepen.io/anon/pen/zLxBo

I think you want something like the following.
html, body {
height: 100%;
}
body {
margin: 0;
}
.flex-container {
height: 100%;
padding: 0;
margin: 0;
display: flex;
align-items: center;
justify-content: center;
}
.row {
width: auto;
border: 1px solid blue;
}
.flex-item {
background-color: tomato;
padding: 5px;
width: 20px;
height: 20px;
margin: 10px;
line-height: 20px;
color: white;
font-weight: bold;
font-size: 2em;
text-align: center;
}
<div class="flex-container">
<div class="row">
<div class="flex-item">1</div>
<div class="flex-item">2</div>
<div class="flex-item">3</div>
<div class="flex-item">4</div>
</div>
</div>
See demo at: http://jsfiddle.net/audetwebdesign/tFscL/
Your .flex-item elements should be block level (div instead of span) if you want the height and top/bottom padding to work properly.
Also, on .row, set the width to auto instead of 100%.
Your .flex-container properties are fine.
If you want the .row to be centered vertically in the view port, assign 100% height to html and body, and also zero out the body margins.
Note that .flex-container needs a height to see the vertical alignment effect, otherwise, the container computes the minimum height needed to enclose the content, which is less than the view port height in this example.
Footnote:
The flex-flow, flex-direction, flex-wrap properties could have made this design easier to implement. I think that the .row container is not needed unless you want to add some styling around the elements (background image, borders and so on).
A useful resource is: http://demo.agektmr.com/flexbox/

How to Center Elements Vertically and Horizontally in Flexbox
Below are two general centering solutions.
One for vertically-aligned flex items (flex-direction: column) and the other for horizontally-aligned flex items (flex-direction: row).
In both cases the height of the centered divs can be variable, undefined, unknown, whatever. The height of the centered divs doesn't matter.
Here's the HTML for both:
<div id="container"><!-- flex container -->
<div class="box" id="bluebox"><!-- flex item -->
<p>DIV #1</p>
</div>
<div class="box" id="redbox"><!-- flex item -->
<p>DIV #2</p>
</div>
</div>
CSS (excluding decorative styles)
When flex items are stacked vertically:
#container {
display: flex; /* establish flex container */
flex-direction: column; /* make main axis vertical */
justify-content: center; /* center items vertically, in this case */
align-items: center; /* center items horizontally, in this case */
height: 300px;
}
.box {
width: 300px;
margin: 5px;
text-align: center; /* will center text in <p>, which is not a flex item */
}
DEMO
When flex items are stacked horizontally:
Adjust the flex-direction rule from the code above.
#container {
display: flex;
flex-direction: row; /* make main axis horizontal (default setting) */
justify-content: center; /* center items horizontally, in this case */
align-items: center; /* center items vertically, in this case */
height: 300px;
}
DEMO
Centering the content of the flex items
The scope of a flex formatting context is limited to a parent-child relationship. Descendants of a flex container beyond the children do not participate in flex layout and will ignore flex properties. Essentially, flex properties are not inheritable beyond the children.
Hence, you will always need to apply display: flex or display: inline-flex to a parent element in order to apply flex properties to the child.
In order to vertically and/or horizontally center text or other content contained in a flex item, make the item a (nested) flex container, and repeat the centering rules.
.box {
display: flex;
justify-content: center;
align-items: center; /* for single line flex container */
align-content: center; /* for multi-line flex container */
}
More details here: How to vertically align text inside a flexbox?
Alternatively, you can apply margin: auto to the content element of the flex item.
p { margin: auto; }
Learn about flex auto margins here: Methods for Aligning Flex Items (see box#56).
Centering multiple lines of flex items
When a flex container has multiple lines (due to wrapping) the align-content property will be necessary for cross-axis alignment.
From the spec:
8.4. Packing Flex Lines: the align-content
property
The align-content property aligns a flex container’s lines within the
flex container when there is extra space in the cross-axis, similar to
how justify-content aligns individual items within the main-axis.
Note, this property has no effect on a single-line flex container.
More details here: How does flex-wrap work with align-self, align-items and align-content?
Browser support
Flexbox is supported by all major browsers, except IE < 10. Some recent browser versions, such as Safari 8 and IE10, require vendor prefixes. For a quick way to add prefixes use Autoprefixer. More details in this answer.
Centering solution for older browsers
For an alternative centering solution using CSS table and positioning properties see this answer: https://stackoverflow.com/a/31977476/3597276

Add
.container {
display: flex;
justify-content: center;
align-items: center;
}
to the container element of whatever you want to center. Documentation:
justify-content and
align-items.

You can make use of
display: flex;
align-items: center;
justify-content: center;
on your parent component

Don't forgot to use important browsers specific attributes:
align-items: center; -->
-webkit-box-align: center;
-moz-box-align: center;
-ms-flex-align: center;
-webkit-align-items: center;
align-items: center;
justify-content: center; -->
-webkit-box-pack: center;
-moz-box-pack: center;
-ms-flex-pack: center;
-webkit-justify-content: center;
justify-content: center;
You could read this two links for better understanding flex:
http://css-tricks.com/almanac/properties/j/justify-content/ and
http://ptb2.me/flexbox/
Good Luck.

Use this:
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
for some HTML markup like this:
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>
html, body {
display: flex;
align-items: center;
justify-content: center;
height: 100%;
}
<html>
<body>
<main>
<button> abc </button>
<p> something </p>
</main>
</body>
</html>

1 - Set CSS on parent div to display: flex;
2 - Set CSS on parent div to flex-direction: column; Note that this will make all content within that div line up top to bottom. This will work best if the parent div only contains the child and nothing else.
3 - Set CSS on parent div to justify-content: center;
Here is an example of what the CSS will look like:
.parentDivClass {
display: flex;
flex-direction: column;
justify-content: center;
}

diplay: flex; for it's container and margin:auto; for it's item works perfect.
NOTE: You have to setup the width and height to see the effect.
#container{
width: 100%; /*width needs to be setup*/
height: 150px; /*height needs to be setup*/
display: flex;
}
.item{
margin: auto; /*These will make the item in center*/
background-color: #CCC;
}
<div id="container">
<div class="item">CENTER</div>
</div>

margin: auto works "perfectly" with flexbox i.e. it allows to center item vertically and horizontally.
html, body {
height: 100%;
max-height: 100%;
}
.flex-container {
display: flex;
height: 100%;
background-color: green;
}
.container {
display: flex;
margin: auto;
}
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JS</title>
</head>
<body>
<div class="flex-container">
<div class="container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
</body>
</html>

If you need to center a text in a link this will do the trick:
div {
display: flex;
width: 200px;
height: 80px;
background-color: yellow;
}
a {
display: flex;
align-items: center;
justify-content: center;
text-align: center; /* only important for multiple lines */
padding: 0 20px;
background-color: silver;
border: 2px solid blue;
}
<div>
text
text with two lines
</div>

RESULT:
CODE
HTML:
<div class="flex-container">
<div class="rows">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
</div>
CSS:
html, body {
height: 100%;
}
.flex-container {
display: flex;
justify-content: center;
align-items: center;
height: 100%;
}
.rows {
display: flex;
flex-direction: column;
}
where flex-container div is used to center vertically and horizontally your rows div, and rows div is used to group your "items" and ordering them in a column based one.

You can add flex-direction:column to flex-container
.flex-container {
flex-direction: column;
}
Add display:inline-block to flex-item
.flex-item {
display: inline-block;
}
because you added width and height has no effect on this element since it has a display of inline. Try adding display:inline-block or display:block. Learn more about width and height.
Also add to row class( you are given row{} not taken as style)
.row{
width:100%;
margin:0 auto;
text-align:center;
}
Working Demo in Row :
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content:center;
flex-direction:column;
}
.row{
width:100%;
margin:0 auto;
text-align:center;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>
Working Demo in Column :
.flex-container {
padding: 0;
margin: 0;
width: 100%;
list-style: none;
display: flex;
align-items: center;
}
.row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
display: inline-block;
}
<div class="flex-container">
<div class="row">
<span class="flex-item">1</span>
</div>
<div class="row">
<span class="flex-item">2</span>
</div>
<div class="row">
<span class="flex-item">3</span>
</div>
<div class="row">
<span class="flex-item">4</span>
</div>
</div>

Hope this will help.
.flex-container {
padding: 0;
margin: 0;
list-style: none;
display: flex;
align-items: center;
justify-content: center;
}
row {
width: 100%;
}
.flex-item {
background: tomato;
padding: 5px;
width: 200px;
height: 150px;
margin: 10px;
line-height: 150px;
color: white;
font-weight: bold;
font-size: 3em;
text-align: center;
}

Using CSS+
<div class="EXTENDER">
<div class="PADDER-CENTER">
<div contentEditable="true">Edit this text...</div>
</div>
</div>
take a look HERE