Create a diagonal background image [closed] - html

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I want to create a diagonal background image as seen in the attached image. I can create a diagonal line using linear-gradient however as I have two different angles this didn't work.

Answer 1

Using Linear Gradients:
This can be done using multiple background images and positioning them accordingly. In the snippet below I've used 3 different layers - one for the top angle (a triangle which is transparent for 50% and is colored for the rest), one for the middle which is essentially nothing but a solid colored rectangle, this is created using linear gradients as it is easier to control the dimensions of an image and finally one for the bottom angle (same approach as the top one but this has a different height and so different angle.)
The output is also responsive as you can see by hovering the element in the below snippet. In the 2nd div, I've set different colors for each image so that you can see how it is formed.
div {
height: 300px;
width: 100%;
background: linear-gradient(to bottom right, transparent 50%, lightblue 51%), linear-gradient(lightblue, lightblue), linear-gradient(to top right, transparent 50%, lightblue 51%);
background-size: 100% 30px, 100% calc(100% - 130px), 100% 100px;
background-position: top left, left 30px, bottom left;
background-repeat: no-repeat;
transition: all 1s ease; /* just for demo */
}
/* just for demo */
div {
margin-bottom: 10px;
}
div:hover {
height: 400px;
}
div:nth-of-type(2) {
background: linear-gradient(to bottom right, transparent 50%, lightblue 51%), linear-gradient(lightpink, lightpink), linear-gradient(to top right, transparent 50%, lightgreen 51%);
background-size: 100% 30px, 100% calc(100% - 130px), 100% 100px;
background-position: top left, left 30px, bottom left;
background-repeat: no-repeat;
}
<div></div>
<div></div>
Using SVG: recommended
This is the approach that I generally recommend and is the best. It involves creating the shape using SVG and then placing it absolutely behind the div element.
div {
position: relative;
height: 300px;
width: 100%;
}
svg {
position: absolute;
height: 100%;
width: 100%;
}
polygon {
fill: lightblue;
}
<div>
<svg viewBox='0 0 300 100' preserveAspectRatio='none'>
<polygon points='0,10 300,0 300,100 0,75z' />
</svg>
</div>
Using Clip-path:
Another approach that can be used is to position a pseudo-element behind the main div and then set a clip-path in the required shape to this pseudo-element.
Note: This snippet will currently work only in WebKit powered browsers. Firefox would need the clip-path to be created via SVG element whereas IE doesn't support it all.
div {
position: relative;
height: 300px;
width: 100%;
}
div:before {
position: absolute;
content: '';
height: 100%;
width: 100%;
background: lightblue;
-webkit-clip-path: polygon(0% 5%, 100% 0%, 100% 100%, 0% 75%);
clip-path: polygon(0% 5%, 100% 0%, 100% 100%, 0% 75%);
}
<div></div>

Answer 2

CSS Perspective
You can use a CSS Perspective Transform to create the shape you want.
div {
margin-top: 25px;
width: 500px;
height: 150px;
transform: perspective( 800px ) rotateY( -25deg );
background: blue;
}
<div></div>
CSS Tricks Docs
Perspective - CSS | MDN

Answer 3

You can apply perspective to the parent container of the rotated div to give it 3-dimensional depth from the front of the viewport.
N.B. For the difference between transform: perspective(value) and perspective: value, see the CSS Tricks Almanac entry on perspective:
Important: Please note the perspective property doesn't affect how the element is rendered; it simply enables a 3D-space for children
elements. This is the main difference between the transform: perspective() function and the perspective property. The first
gives element depth while the latter creates a 3D-space shared by all
its transformed children.
After applying a 3-dimensional depth to the parent container using perspective, you can then apply rotateY to the div you want to rotate.
Working Example:
section {
position: relative;
width: 600px;
perspective: 800px;
transform: translateX(-60px);
}
div:nth-of-type(1) {
position: absolute;
top:30px;
left: 0;
width: 100%;
height: 100px;
background-color: rgb(235,250,255);
transform: rotateY(320deg);
}
div:nth-of-type(2) {
position: absolute;
top: 0;
left: 220px;
width: 120px;
height: 140px;
background-color: rgb(103,201,236);
box-shadow: 6px 6px 6px rgba(127,127,127,0.5);
}
div:nth-of-type(3) {
position: absolute;
top: 24px;
left: 340px;
width: 120px;
height: 140px;
background-color: rgb(255,255,255);
box-shadow: 6px 6px 6px rgba(127,127,127,0.5);
}
<section>
<div></div>
<div></div>
<div></div>
</section>