Web Front-end
CSS Tutorial
In CSS, does overflow: hidden create a new block-level formatting context?
In CSS, does overflow: hidden create a new block-level formatting context?
A block formatting context (BFC) is the part of a web page layout in CSS where elements are positioned and interact with each other. In short, it is like a container that defines a set of rules for how elements should behave within the container.
In this article, we will see "Does overflow:hidden create a new block formatting context (BFC) in CSS?"
The answer is yes, because in CSS, the overflow:hidden attribute can create a new block-level formatting context (BFC). When an HTML element's overflow value is not visible (the default value), it triggers the creation of a new BFC. BFC prevents margins from collapsing, helps maintain correct positioning, prevents accidental overlap, and helps readers perceive contrast between two different elements.
Now, let us look at the following example to understand the impact of overflow: hidden on BFC creation −
The Chinese translation ofExample
is:Example
In the example below, we style the "container" without using the CSS overflow:hidden property.
<!DOCTYPE html>
<html>
<head>
<style>
.container {
height: 70px;
width: 300px;
border: 2px solid;
background-color: lightsalmon;
}
</style>
</head>
<body>
<h1 style="color: seagreen;">Tutorialspoint</h1>
<div class="container">
<p>
Tutorialspoint.com is a dedicated website to
provide quality online education in the domains
of Computer Science, Information Technology,
Programming Languages, and Other Engineering
as well as Management subjects.
</p>
</div>
</body>
</html>We can see from the output that the text in the container exceeds the boundary. Therefore, it may extend outside the container and overlap other elements on the web page, breaking the layout.
The Chinese translation ofExample
is:Example
In the following example, we use the CSS Overflow:hidden property to style the "container" -
<!DOCTYPE html>
<html>
<head>
<style>
.container {
height: 70px;
width: 300px;
border: 2px solid;
overflow: hidden;
background-color: lightsalmon;
}
</style>
</head>
<body>
<h1 style="color: seagreen;">Tutorialspoint</h1>
<div class="container">
<p>
Tutorialspoint.com is a dedicated website to
provide quality online education in the domains
of Computer Science, Information Technology,
Programming Languages, and Other Engineering
as well as Management subjects.
</p>
</div>
</body>
</html>By adding the overflow:hidden attribute to the container, a new BFC is created. Therefore, if the text exceeds the height of the container it will be clipped and hidden from view. But the overflowed text will remain within the container.
The above is the detailed content of In CSS, does overflow: hidden create a new block-level formatting context?. For more information, please follow other related articles on the PHP Chinese website!
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1386
52
Building an Ethereum app using Redwood.js and Fauna
Mar 28, 2025 am 09:18 AM
With the recent climb of Bitcoin’s price over 20k $USD, and to it recently breaking 30k, I thought it’s worth taking a deep dive back into creating Ethereum
Vue 3
Apr 02, 2025 pm 06:32 PM
It's out! Congrats to the Vue team for getting it done, I know it was a massive effort and a long time coming. All new docs, as well.
Can you get valid CSS property values from the browser?
Apr 02, 2025 pm 06:17 PM
I had someone write in with this very legit question. Lea just blogged about how you can get valid CSS properties themselves from the browser. That's like this.
A bit on ci/cd
Apr 02, 2025 pm 06:21 PM
I'd say "website" fits better than "mobile app" but I like this framing from Max Lynch:
Using Markdown and Localization in the WordPress Block Editor
Apr 02, 2025 am 04:27 AM
If we need to show documentation to the user directly in the WordPress editor, what is the best way to do it?
Comparing Browsers for Responsive Design
Apr 02, 2025 pm 06:25 PM
There are a number of these desktop apps where the goal is showing your site at different dimensions all at the same time. So you can, for example, be writing
Stacked Cards with Sticky Positioning and a Dash of Sass
Apr 03, 2025 am 10:30 AM
The other day, I spotted this particularly lovely bit from Corey Ginnivan’s website where a collection of cards stack on top of one another as you scroll.
Let's use (X, X, X, X) for talking about specificity
Mar 24, 2025 am 10:37 AM
I was just chatting with Eric Meyer the other day and I remembered an Eric Meyer story from my formative years. I wrote a blog post about CSS specificity, and
