試一試
backface-visibility: visible;
backface-visibility: hidden;
<section class="default-example" id="default-example">
<div id="example-element">
<div class="face front">1</div>
<div class="face back">2</div>
<div class="face right">3</div>
<div class="face bottom">6</div>
</div>
</section>
#default-example {
background: linear-gradient(skyblue, khaki);
}
#example-element {
width: 100px;
height: 100px;
perspective: 550px;
perspective-origin: 220% 220%;
transform-style: preserve-3d;
}
.face {
display: flex;
align-items: center;
justify-content: center;
width: 100%;
height: 100%;
position: absolute;
backface-visibility: inherit;
background: rgb(0 0 0 / 0.4);
font-size: 60px;
color: white;
}
.front {
transform: translateZ(50px);
}
.back {
background: rgb(230 0 0);
color: white;
transform: rotateY(180deg) translateZ(50px);
}
.right {
background: rgb(0 0 0 / 0.6);
transform: rotateY(90deg) translateZ(50px);
}
.bottom {
background: rgb(0 0 0 / 0.6);
transform: rotateX(-90deg) translateZ(50px);
}
元素的背面是其正面的映象。儘管在 2D 空間中不可見，但當發生轉換導致元素在 3D 空間中旋轉時，背面可能會變得可見。（此屬性對 2D 轉換無效，因為 2D 轉換沒有透視效果。）
語法
css
/* Keyword values */
backface-visibility: visible;
backface-visibility: hidden;
/* Global values */
backface-visibility: inherit;
backface-visibility: initial;
backface-visibility: revert;
backface-visibility: revert-layer;
backface-visibility: unset;
backface-visibility 屬性指定為以下列出的關鍵字之一。
值
visible-
當背面朝向使用者時，背面是可見的。
-
背面被隱藏，當元素背離使用者時，它會變得不可見。
正式定義
正式語法
backface-visibility =
visible |
hidden
示例
具有透明和不透明面的立方體
此示例顯示了一個具有透明面的立方體，以及一個具有不透明面的立方體。
HTML
html
<table>
<tr>
<th><code>backface-visibility: visible;</code></th>
<th><code>backface-visibility: hidden;</code></th>
</tr>
<tr>
<td>
<div class="container">
<div class="cube show-bf">
<div class="face front">1</div>
<div class="face back">2</div>
<div class="face right">3</div>
<div class="face left">4</div>
<div class="face top">5</div>
<div class="face bottom">6</div>
</div>
</div>
<p>
Since all faces are partially transparent, the back faces (2, 4, 5) are
visible through the front faces (1, 3, 6).
</p>
</td>
<td>
<div class="container">
<div class="cube hide-bf">
<div class="face front">1</div>
<div class="face back">2</div>
<div class="face right">3</div>
<div class="face left">4</div>
<div class="face top">5</div>
<div class="face bottom">6</div>
</div>
</div>
<p>The three back faces (2, 4, 5) are hidden.</p>
</td>
</tr>
</table>
CSS
css
/* Classes that will show or hide the
three back faces of the "cube" */
.show-bf div {
backface-visibility: visible;
}
.hide-bf div {
backface-visibility: hidden;
}
/* Define the container div, the cube div, and a generic face */
.container {
width: 150px;
height: 150px;
margin: 75px 0 0 75px;
border: none;
}
.cube {
width: 100%;
height: 100%;
perspective: 550px;
perspective-origin: 150% 150%;
transform-style: preserve-3d;
}
.face {
display: block;
position: absolute;
width: 100px;
height: 100px;
border: none;
line-height: 100px;
font-family: sans-serif;
font-size: 60px;
color: white;
text-align: center;
}
/* Define each face based on direction */
.front {
background: rgb(0 0 0 / 30%);
transform: translateZ(50px);
}
.back {
background: lime;
color: black;
transform: rotateY(180deg) translateZ(50px);
}
.right {
background: rgb(196 0 0 / 70%);
transform: rotateY(90deg) translateZ(50px);
}
.left {
background: rgb(0 0 196 / 70%);
transform: rotateY(-90deg) translateZ(50px);
}
.top {
background: rgb(196 196 0 / 70%);
transform: rotateX(90deg) translateZ(50px);
}
.bottom {
background: rgb(196 0 196 / 70%);
transform: rotateX(-90deg) translateZ(50px);
}
/* Make the table a little nicer */
th,
p,
td {
background-color: #eeeeee;
margin: 0px;
padding: 6px;
font-family: sans-serif;
text-align: left;
}
結果
規範
| 規範 |
|---|
| CSS 變換模組級別 2 # backface-visibility-屬性 |
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