How do I create a slanted background using CSS?

Creating Slanted Backgrounds in CSS

In the realm of web design, creating visually appealing and dynamic layouts can often involve incorporating unusual shapes and gradients. One such challenge is the creation of a slanted or diagonal background, which can add a distinctive flair to any website. While it may seem complex, achieving this effect with CSS is surprisingly straightforward.

This detailed guide will walk you through the steps to create a slanted background using CSS. The example provided by the user shows a diagonal line dividing the background into two contrasting colors. To replicate this effect, we'll utilize pseudo elements and apply a skew transformation.

body {
  height: 100vh;
  margin: 0;
  background: yellow;
}

body:before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 300px;
  background: #000;
  transform: skew(-30deg);
  transform-origin:top;
}

In this code:

• The body element sets the height of the page to 100% of the viewport height, eliminates margins, and applies a yellow background.
• The body:before pseudo element creates a new element before the first child of the body. It's given a blank content value (content: ""), making it an empty container.
• We position the pseudo element absolutely (position: absolute), covering the height and width of the page while aligning it to the left edge (left: 0; width: 300px;).
• The background color (background: #000) is set to black, creating the slanted section.
• The transform: skew(-30deg) property skews the element horizontally by -30 degrees, creating the diagonal slant.
• The transform-origin:top specifies the point from which the skew transformation originates. In this case, it's the top of the element.

By adjusting the angle of the skew transformation and the position of the pseudo element, you can customize the shape and size of the slanted background to suit your design needs.

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