Attempting to craft a CSS circle that mirrors the image below:
...with just a single div:
<div class="myCircle"></div>
solely utilizing CSS rules. No SVG, WebGL, DirectX, etc. permitted.
My initial approach involved constructing a complete circle and then gradually hiding half of it with an additional div, which technically does the job, but I'm seeking a more refined solution.
To create rounded corners on a box, you can utilize the border-top-left-radius and border-top-right-radius properties. Adjust the values based on the box's height and any added borders.
Additionally, add borders to the top, right, and left sides of the box to achieve the desired effect.
Here is an example:
.half-circle {
width: 200px;
height: 100px; /* half of the width */
background-color: gold;
border-top-left-radius: 110px; /* 100px height + 10px border */
border-top-right-radius: 110px; /* 100px height + 10px border */
border: 10px solid gray;
border-bottom: 0;
}
Alternatively, you can include box-sizing: border-box to account for borders and padding in the width and height calculations of the box.
.half-circle {
width: 200px;
height: 100px; /* half of the width */
border-top-left-radius: 100px;
border-top-right-radius: 100px;
border: 10px solid gray;
border-bottom: 0;
-webkit-box-sizing: border-box;
-moz-box-sizing: border-box;
box-sizing: border-box;
}
VIEW UPDATED DEMO. (Demo without background color)
Recently, I encountered a similar issue and managed to find a solution that worked for me
.rotated-half-circle {
/* Create the circle */
width: 40px;
height: 40px;
border: 10px solid black;
border-radius: 50%;
/* Halve the circle */
border-bottom-color: transparent;
border-left-color: transparent;
/* Rotate the circle */
transform: rotate(-45deg);
}<div class="rotated-half-circle"></div>Here is a simple code snippet to create a semi-circle effect.
This code snippet is designed to be responsive as it uses percentage values for the border-radius property.
.semi-circle{
width: 200px;
height: 100px;
border-radius: 50% 50% 0 0 / 100% 100% 0 0;
border: 10px solid #000;
border-bottom: 0;
}<div class="semi-circle"></div>To achieve a unique look, I utilize a percentage-based technique.
border: 2px solid rgb(0, 0, 0);
border-top-left-radius: 50% 150%;
border-top-right-radius: 50% 150%;
#semi-circle{
height: 100px;
/* width is double the height */
width: 200px;
border: 30px solid black;
/* border-radius is height plus border */
border-radius: 130px 130px 0 0;
border-bottom: transparent;
}<div id="semi-circle"></div>A creative concept with a gradient twist:
.container {
width: 200px;
aspect-ratio: 2;
border-radius: 999px 999px 0 0;
background: radial-gradient(50% 100% at bottom,#0000 80%,red 80.5%);
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