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CSS Properties: How to set the border-width is animatable?

CSS Properties: How to set the border-width is animatable?Last update on February 20 2024 12:25:07 (UTC/GMT +8 hours)

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Solution:

HTML Code:

>!DOCTYPE html>>!-- Declares the document type as HTML -->
>html>>!-- Root element of the HTML document -->
>head>>!-- Contains metadata about the HTML document -->
>title>How to set the border-width is animatable>/title>>!-- Sets the title of the HTML document -->
>style type="text/css"> /* Begins a CSS style block */
#xyzdiv { /* Defines a CSS rule for an element with ID "xyzdiv" */
width: 200px; /* Sets the width of the element */
height: 150px; /* Sets the height of the element */
border: 1px solid black; /* Sets the border properties */
-webkit-animation: mymove 5s infinite; /* Specifies the animation for WebKit browsers */
animation: mymove 5s infinite; /* Specifies the animation for all browsers */
}
@keyframes mymove { /* Defines a keyframe animation named "mymove" */
50% {border-width: 20px; /* Sets the border width to 20px at the midpoint of the animation */
border-color: #22CF64; /* Sets the border color to #22CF64 at the midpoint of the animation */
}
}  
>/style>>!-- Ends the CSS style block -->
>/head>>!-- Ends the head section of the HTML document -->
>body>>!-- Contains the content of the HTML document -->
>p>w3resource Tutorial>/p>>!-- Displays a paragraph with the text "w3resource Tutorial" -->
>div id="xyzdiv">Animatable border>/div>>!-- Displays a div element with ID "xyzdiv" and text "Animatable border" -->
>p>>b>Note:>/b> The border-width property does not work alone.>/p>>!-- Displays a note about the border-width property -->
>/body>>!-- Ends the body section of the HTML document -->
>/html>>!-- Ends the HTML document -->

Explanation:

The >!DOCTYPE html> declaration specifies the document type and version of HTML being used.
The >html> element is the root element of the HTML document.
The >head> element contains metadata about the HTML document, such as the title.
The >title> element sets the title of the HTML document.
The >style> element begins a CSS style block.
The #xyzdiv selector defines a CSS rule for an element with the ID "xyzdiv".
The width and height properties set the dimensions of the element.
The border property sets the border properties of the element (1px solid black).
The -webkit-animation and animation properties specify the animation for WebKit browsers and all browsers respectively.
The @keyframes rule defines a keyframe animation named "mymove".
The 50% keyframe specifies the styles at the midpoint of the animation.
Within the 50% keyframe, the border-width property is set to 20px and the border-color property is set to #22CF64.
The >/style> element ends the CSS style block.
The >body> element contains the content of the HTML document.
The >p> element displays a paragraph with the text "w3resource Tutorial".
The >div> element with the ID "xyzdiv" displays a div element with the text "Animatable border".
The >p> element with the note displays a note about the border-width property.
The >/body> element ends the body section of the HTML document.
The >/html> element ends the HTML document.

Live Demo:

See the Pen border-animatable-width-answer by w3resource (@w3resource) on CodePen.

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