Overview of new features of CSS3: How to use CSS3 to achieve rotation effects

Overview of the new features of CSS3: How to use CSS3 to achieve rotation effects

Introduction:
CSS3 is a standard for modifying the style of HTML web page elements. Compared with CSS2, CSS3 introduces many new features, one of which is the rotation effect. Using the rotation feature of CSS3, we can easily add rotation animations to web page elements to make the page more lively and interesting. This article will introduce the rotation feature of CSS3 and give some example codes for everyone to learn and refer to.

1. CSS3 rotation attributes
In CSS3, there are two main rotation attributes: transform and transform-origin.

1. transform attribute
   The transform attribute is used to perform transformation operations such as rotation, scaling, and movement of elements. The specific rotation effect can be achieved through the rotate, scale and skew properties of transform.
2. rotate: Rotate the element, the default unit is degrees.
3. scale: Scale element, default value is 1.
4. skew: Skew element, the default unit is degrees.
5. transform-origin attribute
   The transform-origin attribute is used to set the position of the rotation center point. The default value is the center point of the element. You can use pixels (px), percentages (%) or keywords (top, right, bottom, left) to specify the position of the rotation center point.

2. Example code: To achieve image rotation effect
The following is an example code that uses CSS3 to achieve image rotation effect:

HTML code:

<div class="rotate-box">
  <img class="rotate-image lazy"  src="/static/imghw/default1.png"  data-src="image.jpg"  alt="旋转图片">
</div>

CSS code:

.rotate-box {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 300px;
  height: 300px;
  background-color: #f7f7f7;
}

.rotate-image {
  width: 200px;
  height: 200px;
  transform: rotate(0deg);
  transition: transform 0.5s ease;
}

.rotate-image:hover {
  transform: rotate(360deg);
}

Code analysis:

1. Use a div container containing an image (class is .rotate-box) as the base point of rotation.
2. The class of the image is .rotate-image, set the width and height to 200px, and initialize the rotation angle to 0deg.
3. Use the :hover pseudo-class selector to set the rotation angle of the image to 360deg when the mouse is hovering to achieve a rotation effect.
4. Use the transition attribute to make the rotation process have a smooth transition effect, the duration is 0.5 seconds, and the easing mode is ease.

3. Example code: To achieve text rotation effect
The following is an example code that uses CSS3 to achieve text rotation effect:

HTML code:

<div class="rotate-text">
  <p>Hello, CSS3!</p>
</div>

CSS code:

.rotate-text {
  width: 200px;
  height: 200px;
  background-color: #f7f7f7;
  display: flex;
  justify-content: center;
  align-items: center;
  perspective: 1000px;
}

.rotate-text p {
  font-size: 24px;
  color: #333;
  transform-style: preserve-3d;
  transform: rotateX(0deg) rotateY(0deg);
  transition: transform 0.5s ease;
}

.rotate-text:hover p {
  transform: rotateX(360deg) rotateY(360deg);
}

Code analysis:

1. Use a div container (class is .rotate-text) to contain a text label.
2. Set the width, height and background color of the div container, and achieve center alignment.
3. Create a perspective effect by setting the perspective attribute on the text label.
4. Transmit the 3D rotation effect of the parent element of the text label to its child elements through the transform-style attribute to achieve the 3D rotation effect.
5. Use the .hover pseudo-class selector to set the rotation angles of the X-axis and Y-axis of the text label to 360deg when the mouse is hovering to achieve a 3D rotation effect.
6. Use the transition attribute to make the rotation process have a smooth transition effect, the duration is 0.5 seconds, and the easing mode is ease.

Conclusion:
The rotation feature of CSS3 adds rich animation effects to web page elements, which can improve the user experience of web pages. This article demonstrates how to use CSS3 to achieve image rotation and text rotation effects through two example codes. I hope readers can master the rotation characteristics of CSS3 through these sample codes and use them flexibly in actual projects.

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