An example of how to add outline to a div element in css3
css3 outline adds outlines to div elements
Sometimes in order to make the style more beautiful, you can add outlines to divs appropriately. This can be achieved through the outline attribute.
outline contains the following attribute values;
outline-width: the thickness of the outline.
This attribute value contains 4 parameters: thin, medium, thick, length
thin: defines a thin outline;
medium: defines a medium outline;
thick: Defines a thick outline.
length: You can specify the thickness of the outline. Note, this value cannot be negative;
outline-style: The style of the outline.
Commonly used parameters for this attribute:
none: When set to none, the outline will not be displayed.
dotted: dotted outline,
dashed: dotted line Contour line,
solid: solid contour line.
outline-color: The color of the outline
Parameters of this attribute:
Color name: (red);
rgb color value: rgb( 255,255,255);
Hexadecimal color value: such as: #ff0000;
outline-offset: the offset value of the outline and the container. When this value is negative, an outline will appear inside the container.
The sample code is as follows:
<!DOCTYPE html> <html> <head> <meta charset='utf-8' /> <title>无标题文档</title> <style> .aixuexi{ padding:20px; position:fixed; top:100px; left:300px; border:2px dashed #000; width:100px; height:100px; line-height:100px; background:#abcdef; outline-width:10px; outline-style:solid; outline-color:#99FF00; outline-offset:20px; } </style> </head> <body> <div class="aixuexi"><a href="#">hello world</a></div> </body> </html>
The above is the detailed content of An example of how to add outline to a div element in css3. 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



How to achieve wave effect with pure CSS3? This article will introduce to you how to use SVG and CSS animation to create wave effects. I hope it will be helpful to you!

This article will show you how to use CSS to easily realize various weird-shaped buttons that appear frequently. I hope it will be helpful to you!

Two methods: 1. Using the display attribute, just add the "display:none;" style to the element. 2. Use the position and top attributes to set the absolute positioning of the element to hide the element. Just add the "position:absolute;top:-9999px;" style to the element.

In CSS, outline refers to the attribute that sets the outline of an element. You can specify the style, color, and width of the element's outline. outline is a shorthand attribute. You can set the style, color and width simultaneously in order in one statement. The syntax is "outline:outline-color outline-style outline-width;"; if one of the values is not set, no error will occur. question.

In CSS, you can use the border-image attribute to achieve a lace border. The border-image attribute can use images to create borders, that is, add a background image to the border. You only need to specify the background image as a lace style; the syntax "border-image: url (image path) offsets the image border width inward. Whether outset is repeated;".

Implementation method: 1. Use the ":active" selector to select the state of the mouse click on the picture; 2. Use the transform attribute and scale() function to achieve the picture magnification effect, the syntax "img:active {transform: scale(x-axis magnification, y Axis magnification);}".

How to create text carousel and image carousel? The first thing everyone thinks of is whether to use js. In fact, text carousel and image carousel can also be realized using pure CSS. Let’s take a look at the implementation method. I hope it will be helpful to everyone!

In CSS3, you can use the "animation-timing-function" attribute to set the animation rotation speed. This attribute is used to specify how the animation will complete a cycle and set the speed curve of the animation. The syntax is "element {animation-timing-function: speed attribute value;}".
