設定元素背景圖片的原始起始位置。必須保證背景是background-repeat為no-repeat
此屬性才會生效。
可取值有 border-box | padding-box | content-box
border-box:設定背景圖片原點在邊框的最左上角
<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>
padding-box:設定背景圖片原點在內邊距的最左上角
<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>
content-box:設定背景圖片原點在內容區域的最左上角
<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>
設定背景影像向外裁切的區域。
可取值有 border-box | padding-box | content-box
border-box:設定裁切區域為邊框以內,包含邊框
<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>
padding-box:設定裁切區域為內邊距以內,包含內邊距
<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>
content-box:設定裁切區域為內容區域
<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>
改變元素的大小,透明,旋轉角度,扭曲度等。
語法:
transform:none |
transform-function包含下列幾種方法:
translate(): 指定物件的2D translation(2D平移)。第一個參數對應X軸,第二個參數對應Y軸。如果第二個參數未提供,則預設值為0
transform-origin:任何一個元素都有一個中心點,預設值為0
transform-origin:任何一個元素都有一個中心點,預設值之下,其中心點是居於元素X軸和Y軸的50%處。
translateX(): 指定物件X軸(水平方向)的平移
translateY():指定物件Y軸(垂直方向)的平移
rotate(): 指定物件的2D rotation(2D旋轉),需先有 屬性的定義
scale(): 指定物件的2D scale(2D縮放)。第一個參數對應X軸,第二個參數對應Y軸。如果第二個參數未提供,則預設取第一個參數的值
skew(): 指定物件skew transformation(斜切扭曲)。第一個參數對應X軸,第二個參數對應Y軸。如果第二個參數未提供,則預設值為0
translate:向X軸和Y軸分別偏移元素自身的50%
<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>
transform-origin:把元素的中心點設定在0 0位置,即左上角
<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>
translateX:僅設定X軸的偏移
<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>
translateY:僅設定Y軸的偏移
<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>
rotate:設定元素進行2D旋轉,接受的參數為角度(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>
scale:設定元素縮放3倍,接受的參數為數值,表示放大的倍數
<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>
skew:設定元素的傾斜角度
<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>
translate3d:設定元素的3d位移
<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>