How to use CSS to achieve image flipping effect

In modern website design and development, the image flip effect has become a very popular and common design element. Through this effect, users can more intuitively feel the vitality and dynamics of the website. In this article, we will focus on how to achieve this image flip effect using CSS.

First of all, we need to clarify that CSS3 provides two ways to achieve the image flip effect. They use 2D transformation and 3D transformation respectively.

2D transformation refers to rotating an element by a certain angle along the x-axis or y-axis to give it a two-dimensional flip effect. The 3D transformation is based on 2D and adds rotation along the z-axis, giving the element a three-dimensional flipping effect.

Let’s first look at the code that uses 2D transformation to flip the image. First, we need to define a picture element in HTML and use CSS to set its size and position in the web page:

<div>
  <div>
    <img  src="/static/imghwm/default1.png" data-src="image.jpg" class="lazy" alt="How to use CSS to achieve image flipping effect" >
  </div>
</div>

.flip-container {
  width: 200px;
  height: 200px;
  perspective: 1000px;
}
.flipper {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: all .5s ease-in-out;
}
.flipper:hover {
  transform: rotateY(180deg);
}
img {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
}

As you can see, we first define a .flip-container element and set its Width and height, and use the perspective attribute to define the viewing angle. This is a required property for 3D transformations.

Next, we define a .flipper element and set its width, height and positioning. At the same time, we also need to set its transform-style property to preserve-3d to enable 3D transformation. On this element, we also defined a :hover pseudo-class. When the mouse hovers over this element, a rotation animation will be triggered to flip the picture.

Finally, we define an img element, set its width, height and positioning, and hide its backside using the backface-visibility property. This is because when the element is flipped, the back side is exposed, which, if not hidden, affects the overall experience of the effect.

Next, let’s take a look at how to use 3D transformation to achieve the image flip effect. This process is very similar to 2D transformation. You only need to add rotation along the z-axis to the .flipper element:

<div>
  <div>
    <div>
      <img  src="/static/imghwm/default1.png" data-src="front-image.jpg" class="lazy" alt="How to use CSS to achieve image flipping effect" >
    </div>
    <div>
      <img  src="/static/imghwm/default1.png" data-src="back-image.jpg" class="lazy" alt="How to use CSS to achieve image flipping effect" >
    </div>
  </div>
</div>

.flip-container {
  width: 200px;
  height: 200px;
  perspective: 1000px;
}
.flipper {
  width: 100%;
  height: 100%;
  position: relative;
  transform-style: preserve-3d;
  transition: all .5s ease-in-out;
}
.flipper:hover {
  transform: rotateY(180deg);
}
.front, .back {
  position: absolute;
  width: 100%;
  height: 100%;
  backface-visibility: hidden;
}
.front {
  transform: rotateY(0deg);
}
.back {
  transform: rotateY(180deg);
}

As you can see, in this case, we need to inline the .flipper element Set two child elements, .front and .back, and set their content and style respectively. In this process, we also need to use backface-visibility to hide the back of the element.

At the same time, on the .front and .back elements, we also need to set different rotation attributes along the z-axis so that they can flip at different angles.

In addition to the above two methods, there are other more complex ways to achieve image flipping effects, such as using CSS animation, JavaScript and other technologies. You can choose the most appropriate solution based on actual needs.

In summary, using CSS to achieve image flipping effect is a very simple, intuitive and easy-to-implement method. By mastering the 2D transformation and 3D transformation of CSS3, you can easily achieve the desired effect and enhance the visual effect and user experience of the website.

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