← Back toFront-end tips

Do not mix styles of an element with its container

Written byPhuoc Nguyen
12 May, 2021
When developing a reusable component, we should follow the rule: the component should look like the same regardless where it's placed.
For example, the `margin` style in the following CSS is used for a specific use case where we want to have a space between `.item` and its sibling element.
.item {
margin: 1rem 0;

/* Other styles */
It isn't recommended because it could be broken when you use `item` in another container. Instead, you should use a wrapper to separate the styles of element and its container:
.item-wrapper {
margin: 1rem 0;
The `item` class can be reused in different places without breaking the look and feel:
<div class="item-wrapper">
<div class="item">...</div>

<!-- Used in another wrapper -->
<div class="other-wrapper">
<div class="item">...</div>
If you found this post helpful, please consider giving the repository a star on GitHub or sharing the post on your favorite social networks 😍. Your support would mean a lot to me!

Questions? 🙋

Do you have any questions about front-end development? If so, feel free to create a new issue on GitHub using the button below. I'm happy to help with any topic you'd like to learn more about, even beyond what's covered in this post.
While I have a long list of upcoming topics, I'm always eager to prioritize your questions and ideas for future content. Let's learn and grow together! Sharing knowledge is the best way to elevate ourselves 🥷.
Ask me questions

Recent posts ⚡

Newsletter 🔔

If you're into front-end technologies and you want to see more of the content I'm creating, then you might want to consider subscribing to my newsletter.
By subscribing, you'll be the first to know about new articles, products, and exclusive promotions.
Don't worry, I won't spam you. And if you ever change your mind, you can unsubscribe at any time.
Phước Nguyễn