Essentially, achieving a similar effect (or something very close) is technically possible through the use of pure CSS.
The key element you need to explore is a relatively new concept known as animations.
To start off, let's set up some basic markup:
<div id="wheel"></div>
Now, we'll apply some CSS styles to it:
#wheel {
width: 100px;
height: 100px;
border-radius: 100%;
border: 5px solid #90F090;
border-right: 5px solid #000070;
}
The next step involves animation, which I won't visually demonstrate each part here, but the result resembles what you're aiming for. With tweaking, you can enhance its appearance, especially if you want it to transition smoothly to the correct percentage.
For testing purposes, introduce a :hover effect to rotate it:
#wheel:hover {
-webkit-transform: rotate(80deg);
-moz-transform: rotate(80deg);
-o-transform: rotate(80deg);
-ms-transform: rotate(80deg);
transform: rotate(80deg);
}
Now, let's move on to automating the animation process. In CSS3, this can be achieved using the 'animate' property.
The standard syntax looks like this:
@keyframes <name> {
from {
/* Initial state */
}
to {
/* Final state */
}
}
You have the flexibility to specify percentages for different stages within the animation timeline. For instance, 'from' corresponds to 0% and 'to' correlates with 100%.
To create a spinning wheel effect, animate the rotation from 0deg to 359deg inside the 'from' and 'to' sections.
After setting up the animations, you might encounter a limitation when working with circular borders. To overcome this restriction, consider overlapping two circles, one designed to conceal a portion by slightly rotating it.
Here's an example demonstrating this concept:
#container {
width: 110px;
height: 110px;
padding: 0;
margin: 0;
position: relative;
}
#wheel, #hide {
/* Styling details */
}
#hide {
/* Additional styling to hide part of the circle */
}
/* Animation keyframes definition */
@keyframes spin {
/* Rotation values */
}
A jsfiddle link showcasing a rotating segment can be found here.
By strategically utilizing transparent borders or overlapping techniques, you can customize the arc length according to your requirements. Experimenting with animations will help you fine-tune the loading circle to perfection.
In conclusion, while this approach illustrates animations and circular shapes using solely CSS, specific libraries cater more efficiently to tasks such as creating pie charts.
Please note that the intention behind these examples is to familiarize you with animation capabilities in CSS. Feel free to adjust and expand upon these concepts based on your preferences.