Transform is a new attribute of CSS3. It is used to set the shape change of elements and realize 2D or 3D conversion of elements. It can be used with the attribute value (transformation function) to rotate, skew, and scale the elements. scale, move translate and matrix deformation matrix.
The operating environment of this tutorial: Windows 7 system, CSS3&&HTML5 version, Dell G3 computer.
Transform literally means transformation, which means change. It is a new attribute of CSS3, which is used to set the shape change of elements and realize 2D or 3D transformation of elements.
Transform in CSS3 mainly includes the following types: rotation rotate, distortion skew, scaling scale and mobile translate and matrix transformation matrix.
rotate Rotate
Rotate the element by the specified angle. The degree is positive and clockwise. If the set value is a positive number, it means clockwise. Rotation, if the set value is negative, it means counterclockwise rotation.
Example:
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<style>
body{
background-color: #000;
}
.box{
width: 100px;
height: 100px;
border: 1px solid #fff;
position: relative;
top: 100px;
left: 100px;
}
.box1{
width: 100px;
height: 100px;
background-color: red;
transform:rotate(30deg);
}
</style>
<body>
<div>
<div></div>
</div>
</body>
</html> Effect:
##scale scaling
scale has three situations:scale(x,y)
Make the element scale horizontally and vertically at the same timescaleX(x)
The element only scales horizontally (X-axis scaling)scaleY(y)
The element scales only vertically (Y-axis scaling)
.box{
transfrom:scale(2,2)
}
.box{
transfrom:scaleX(2)
}
.box{
transfrom:scaleY(2)
}Rendering:
##translate Mobile
Mobile translate is divided into three types Situation:
- translate(x,y)
Move horizontally and vertically at the same time (that is, the X-axis and Y-axis move at the same time);
- translateX(x)
Only moves in the horizontal direction (X-axis movement);
- translateY(Y)
Only Vertical movement (Y-axis movement)
##translate(x,y)
.box{
transfrom：translate(100px,20px);
}
transform:translateX()
.box{
transform:translateX(100px);
}
transform:translateY()
.box{
transform:translateY(100px);
}
skew distortion
skew is also divided into three situations
- make the element in Distort horizontally and vertically at the same time (the X-axis and Y-axis are distorted according to a certain angle value at the same time);
-
skewX(x) only makes the element horizontal Directional distortion (X-axis distortion); -
skewY(y) Only causes the element to distort in the vertical direction (Y-axis distortion) <pre class='brush:php;toolbar:false;'>.box{ transform:skew(20deg,20deg); } .box{ transform:skewX(20deg); } .box{ transform:skewY(20deg); }</pre>
transform-origin Change the element base point
transform-origin(X ,Y): Used to set the base point (reference point) of the element's movement. The default point is the center point of the element. The values of X and Y can be percentage values, em, and px, and X can also be character parameter values left, center, and right; Y, like X, can also set character values top, center, and bottom in addition to percentage values.
(Learning video sharing: css video tutorial,
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