CSS (4): Background + Transformation-HTML Tutorial-php.cn

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CSS (4): Background + Transformation

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Aug 15, 2016 pm 04:49 PM

background-origin

Set the original starting position of the element's background image. You must ensure that the background-repeat is no-repeat for this attribute to take effect.
The possible values are border-box | padding-box | content-box

border-box: Set the origin of the background image to the upper left corner of the border

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    background-repeat:no-repeat;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-origin:border-box;
</span><span style="color: #008080;">5</span> <span style="color: #000000;">}
</span><span style="color: #008080;">6</span> 
<span style="color: #008080;">7</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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padding-box: Set the origin of the background image to the upper left corner of the padding

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    background-repeat:no-repeat;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-origin:padding-box;
</span><span style="color: #008080;">5</span> <span style="color: #000000;">}
</span><span style="color: #008080;">6</span> 
<span style="color: #008080;">7</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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content-box: Set the origin of the background image to the upper left corner of the content area

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    background-repeat:no-repeat;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-origin:content-box;
</span><span style="color: #008080;">5</span> <span style="color: #000000;">}
</span><span style="color: #008080;">6</span> 
<span style="color: #008080;">7</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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Set the area where the background image is cropped outward.

The possible values are border-box | padding-box | content-box

border-box: Set the cropping area to be within the border, including the border

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    background-clip:border-box;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">}
</span><span style="color: #008080;">5</span> 
<span style="color: #008080;">6</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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padding-box: Set the cropping area to be within the padding, including padding

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    background-clip:padding-box;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">}
</span><span style="color: #008080;">5</span> 
<span style="color: #008080;">6</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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content-box: Set the cropping area to the content area

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    background-clip:content-box;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">}
</span><span style="color: #008080;">5</span> 
<span style="color: #008080;">6</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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Change the size, transparency, rotation angle, distortion, etc. of elements.

Syntax:
transform: none | +
transform-function contains the following methods:
translate(): Specify the 2D translation of the object (2D translation). The first parameter corresponds to the X-axis, and the second parameter corresponds to the Y-axis. If the second parameter is not provided, the default value is 0
transform-origin: Any element has a center point. By default, its center point is located at 50% of the X-axis and Y-axis of the element.
translateX(): Specify the translation of the X-axis (horizontal direction) of the object
translateY(): Specify the translation of the Y-axis (vertical direction) of the object
rotate(): Specify the 2D rotation (2D rotation) of the object, you need to have < ' transform-origin '> Definition of attributes
scale(): Specifies the 2D scale (2D scaling) of the object. The first parameter corresponds to the X-axis, and the second parameter corresponds to the Y-axis. If the second parameter is not provided, the value of the first parameter is taken by default
skew(): Specifies the object skew transformation (oblique distortion). The first parameter corresponds to the X-axis, and the second parameter corresponds to the Y-axis. If the second parameter is not provided, the default value is 0
translate3d(): Specifies the 3D displacement of the object. The first parameter corresponds to the X axis, the second parameter corresponds to the Y axis, and the third parameter corresponds to the Z axis. Parameters are not allowed to be omitted

translate: Offset the element by 50% to the X axis and Y axis respectively

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform: translate(50%,50%);
</span><span style="color: #008080;">6</span> <span style="color: #000000;">}
</span><span style="color: #008080;">7</span> 
<span style="color: #008080;">8</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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transform-origin: Set the center point of the element at position 0 0, which is the upper left corner

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform-origin:0 0;
</span><span style="color: #008080;">6</span> <span style="color: #000000;">    transform: translate(50%,50%);
</span><span style="color: #008080;">7</span> <span style="color: #000000;">}
</span><span style="color: #008080;">8</span> 
<span style="color: #008080;">9</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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translateX: Only set the offset of the X axis

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform: translateX(50%);
</span><span style="color: #008080;">6</span> <span style="color: #000000;">}
</span><span style="color: #008080;">7</span> 
<span style="color: #008080;">8</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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translateY: Only set the offset of the Y axis

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform: translateY(50%);
</span><span style="color: #008080;">6</span> <span style="color: #000000;">}
</span><span style="color: #008080;">7</span> 
<span style="color: #008080;">8</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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rotate: Set the element for 2D rotation, the accepted parameter is the angle (deg)

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform: rotate(180deg);
</span><span style="color: #008080;">6</span> <span style="color: #000000;">}
</span><span style="color: #008080;">7</span> 
<span style="color: #008080;">8</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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scale: Set the element to be scaled 3 times. The accepted parameters are numerical values, indicating the magnification factor

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform: scale(3);
</span><span style="color: #008080;">6</span> <span style="color: #000000;">}
</span><span style="color: #008080;">7</span> 
<span style="color: #008080;">8</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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skew: Set the tilt angle of the element

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform: skew(60deg);
</span><span style="color: #008080;">6</span> <span style="color: #000000;">}
</span><span style="color: #008080;">7</span> 
<span style="color: #008080;">8</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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translate3d: Set the 3d displacement of the element

<span style="color: #008080;">1</span> <span style="color: #000000;">.img{
</span><span style="color: #008080;">2</span> <span style="color: #000000;">    width:200px;
</span><span style="color: #008080;">3</span> <span style="color: #000000;">    height:200px;
</span><span style="color: #008080;">4</span> <span style="color: #000000;">    background-image:url(1.jpg);
</span><span style="color: #008080;">5</span> <span style="color: #000000;">    transform: translate3d(50px,50px,1px);
</span><span style="color: #008080;">6</span> <span style="color: #000000;">}
</span><span style="color: #008080;">7</span> 
<span style="color: #008080;">8</span> <span style="color: #0000ff;"><</span><span style="color: #800000;">div </span><span style="color: #ff0000;">class</span><span style="color: #0000ff;">="img"</span><span style="color: #0000ff;">></</span><span style="color: #800000;">div</span><span style="color: #0000ff;">></span>

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