How to divide a circle in half in the web front-end

In web front-end design, circles are widely used. Among them, the design of dividing a circle into two halves has become increasingly popular in recent years. Web designers use this design technique to increase the visual appeal of a web page while maintaining its simplicity. This article will introduce several ways to split a circle in half in a web front-end.

Method 1: Use CSS borders

The first method is to use CSS borders. In this case, we can divide the circular container into two halves by representing the upper and lower halves of the circular container with different border colors. We can create this effect by setting a wider upper half border and a narrower lower half border.

Here is some CSS code to create this effect:

<code>.container {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  border: 15px solid black;
  border-bottom: none;
}

.top {
  border-color: red;
}</code>

In the above code, we create a div element named .container where Turn it into a circular container by setting the border-radius property. We then split it in half by setting the top and bottom borders of the border property. Finally, we use the .top class to set the border color of the top half to red.

Method 2: Use CSS Transforms

The second method is to use CSS Transforms. In this case, you can use the transform: skew() attribute and the :before and :after pseudo-elements to split the circular container in half.

Here is some CSS code to create this effect:

<code>.container {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  position: relative;
}

.container:before, .container:after {
  content: "";
  position: absolute;
  width: 50%;
  height: 100%;
  top: 0;
  transform-origin: center center;
  transform: skew(45deg);
}

.container:before {
  left: 0;
  background: black;
}

.container:after {
  right: 0;
  background: red;
  transform: skew(-45deg);
}</code>

In the above code, we create a div element named .container where Turn it into a circular container by setting the border-radius property. We then use the :before and :after pseudo-elements to create the upper and lower halves. We can create this effect by setting their width and transform: skew() properties.

Method Three: Use SVG

The third method is to use SVG. In this case, you can use the <path> element to create a semicircular path and combine it with other SVG elements to create a separator effect.

Here is some HTML and SVG code to create this effect:

<code><div class="container">
  <svg viewBox="0 0 100 100">
    <path d="M50,0 A50,50 0 0 1 100,50 L50,50 Z" fill="black"></path>
    <circle r="50" cx="50" cy="50" fill="none" stroke="black"></circle>
  </svg>
</div></code>

In the above code, we create a div element named .container , and add an SVG element inside it. We then created a semicircular path using the <path> element and set its color to black using the fill color. Finally, we create this effect by using round elements and placing them inside a round container.

Conclusion

In web front-end design, the use of circular containers is very common. Splitting a round container in half can increase the visual appeal of the page while keeping it simple. This article describes three ways to split a circular container into two halves in a web frontend: using CSS borders, using CSS Transforms, and using SVG. Each method has its advantages and disadvantages, and you can choose the method that suits you based on your needs.

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