Home > Web Front-end > CSS Tutorial > How to Avoid Double Borders in CSS: Outline vs. Negative Margins?

How to Avoid Double Borders in CSS: Outline vs. Negative Margins?

Patricia Arquette
Release: 2024-11-03 05:46:03
Original
865 people have browsed it

How to Avoid Double Borders in CSS: Outline vs. Negative Margins?

Avoiding Duplicated Borders in CSS

When adjacent elements with borders are placed next to each other, a visual artifact known as "double borders" can occur at the border intersection. To eliminate this undesirable effect, consider these CSS approaches:

Option 1: Using Outline Property

For situations where the order of elements is unpredictable, using the outline property can effectively prevent double borders:

<code class="css">.collection {
  /* Optional styling */
  margin-top: -1px;
  margin-left: -1px;
}

.collection .child {
  outline: 1px solid; /* Replaces border */
  margin-top: 1px;
  margin-left: 1px;
}</code>
Copy after login

Note that outline is not supported in older browsers (IE7 and earlier).

Option 2: Negative Margins with Borders

If using borders is preferred, employ negative margins to offset the double border:

<code class="css">.collection .child {
  margin-top: -1px;
  margin-left: -1px;
}</code>
Copy after login

The above is the detailed content of How to Avoid Double Borders in CSS: Outline vs. Negative Margins?. For more information, please follow other related articles on the PHP Chinese website!

source:php.cn
Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn
Latest Articles by Author
Popular Tutorials
More>
Latest Downloads
More>
Web Effects
Website Source Code
Website Materials
Front End Template