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Cover image for How to center things in CSS ๐Ÿ’˜

How to center things in CSS ๐Ÿ’˜

mindset profile image Jayesh Tembhekar โšก Updated on ใƒป1 min read

Yo devs ! ๐Ÿ”ฅ

A quick guide on "How to center things in CSS" ๐Ÿ™Œ

Most of the time, you write great CSS code from colors to complex animations.
But I know most of us (beginners) still struggle to center elements on a viewport perfectly.

Don't worry devs, you are no longer be an noob at the end of this short guide.

Let's get started

There are two ways to center any HTML element on a web page :

1. Using Flexbox

2. Using Transform

  • Using Flexbox

HTML code as shown below ๐Ÿ‘‡

  <body>
    <div class="container">
      <div id="object"></div>
    </div>
  </body>

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Now the CSS code


html,
body,
.container {
  height: 100%;
  overflow: hidden;
}

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

#object {
  height: 100px;
  width: 100px;
  background: red;
  align-self: center;
}


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  • Using Transform

HTML code shown below ๐Ÿ‘‡


<body>
    <div class="element"></div>
</body>

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Now the CSS code


.element
    {
        width: 100px;
        height: 100px;
        background: coral;           
    }

.element
    { 
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50% , -50%);
    }

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Check out my other posts too ๐Ÿฅ‚

Author: Jayesh ๐Ÿงก

Posted on by:

mindset profile

Jayesh Tembhekar โšก

@mindset

Front-end Development, UI/UX Designer ๐ŸŒˆ& a Data Science ๐Ÿ“Š enthusiast.

Discussion

pic
Editor guide
 

You could also use the old style:

#content {
margin: 0 auto;
}

but this works only on block elements, so just add display: block; for inline elements.

Thanks for sharing!

 

That would only center horizontally though.

 

Yes, that's right.
Although, to align both horizontally and vertically you can also use margin in combination with position.

here is an example

 

I generally use this website: howtocenterincss.com

 

Nice.

Just to add, I usually give the flex container the responsibility of aligning its children. E.g.

<section>
  <div id="object"></div>
  <div>Hello World!</div>
</section>
section {
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center; /* To vertically align all items added to the flex--not just one. */
}

Then any time you add another child, they will automagically align in the centre. In the example above, the children will align in one column because I specified flex-direction: column;.

Demo on CodePen.


Question @mindset ,

Why define the .element class twice on top of each other? Is there an advantage to that?

Here's how I would have done it.

 

Not an advantage, just to separate main transform properties for easy understanding ๐Ÿ˜…

 

Ok. Cool. I typically don't see that style unless it's a mistake. That's why I asked.

If you want to be more OO-like, I would delegate alignment to another class. Then add that class to the class list in the HTML. Like what I've shared with you above. Similar to multiple inheritance.

Then .demo-box and .centre-me are reusable.

Thanks!

 

With CSS Grid:

.selector {
    display: grid;
    place-items: center;
}

I wrote about it in the following post:

 

display: flex for parent
margin: auto for centered block

 

Flex for life ๐Ÿงก

 

just add to the parent div {

display: flex;
justify-content: center;
align-items: center;

}