backface-visibility

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backface-visibility ã¯ CSS ã®ããããã£ã§ãè¦ç´ ãã¦ã¼ã¶ã¼ã«å¯¾ãã¦è£å´ãåããã¨ãã«ãè£é¢ãå¯è¦ã«ãããã©ãããè¨å®ãã¾ãã

è©¦ãã¦ã¿ã¾ããã

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);
}

æ§æ

css

/* ãã¼ã¯ã¼ãå¤ */
backface-visibility: visible;
backface-visibility: hidden;

/* ã°ãã¼ãã«å¤ */
backface-visibility: inherit;
backface-visibility: initial;
backface-visibility: revert;
backface-visibility: revert-layer;
backface-visibility: unset;

backface-visibility ããããã£ã¯ãä»¥ä¸ã«æãããã¼ã¯ã¼ãã®ãã¡ã®ä¸ã¤ã§æå®ãã¾ãã

å¤

visible: ã¦ã¼ã¶ã¼ã«å¯¾ãã¦è£ãåããã¨ããèé¢ãå¯è¦ã«ãªãã¾ãã
hidden: èé¢ãéè¡¨ç¤ºã«ãªããè¦ç´ ãã¦ã¼ã¶ã¼ã«å¯¾ãã¦åå¯¾ãåããã¨ãã«ä¸å¯è¦ã«ããã®ã«ä¾¿å©ã§ãã

å¬å¼å®ç¾©

åæå¤	`visible`
é©ç¨å¯¾è±¡	åº§æ¨å¤æå¯è½è¦ç´
ç¶æ¿	ãªã
è¨ç®å¤	æå®éã
ã¢ãã¡ã¼ã·ã§ã³ã®ç¨®é¡	é¢æ£å¤

å½¢å¼ææ³

backface-visibility = 
  visible  |
  hidden

ä¾

éæãªé¢ã¨ä¸éæãªé¢ãæã£ãç«æ¹ä½

ãã®ä¾ã¯ãéæãªé¢ã¨ä¸éæãªé¢ãæã¤ç«æ¹ä½ãè¡¨ç¤ºãã¾ãã

HTML

html

<table>
  <thead>
    <tr>
      <th><code>backface-visibility: visible;</code></th>
      <th><code>backface-visibility: hidden;</code></th>
    </tr>
  </thead>
  <tbody>
    <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>
          ãã¹ã¦ã®é¢ãéæã§ãããè£é¢ (2, 4, 5) ãè¡¨é¢ (1, 3, 6) ãéãã¦è¡¨ç¤ºããã¾ãã
        </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>èå¾ã®3é¢ (2, 4, 5) ã¯éè¡¨ç¤ºã§ãã</p>
      </td>
    </tr>
  </tbody>
</table>

CSS

css

/* ãç«æ¹ä½ãã® 3 ã¤ã®èé¢ãè¡¨ç¤ºã¾ãã¯éè¡¨ç¤ºã«ããã¯ã©ã¹ */
.show-bf div {
  backface-visibility: visible;
}

.hide-bf div {
  backface-visibility: hidden;
}

/* ã³ã³ããã¼ divãç«æ¹ä½ divãé¢ã®ä¸è¬çãªè¨å® */
.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;
}

/* æ¹åã«åºã¥ãã¦ããããã®é¢ãè¨å® */
.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);
}

/* ãã¼ãã«ã®è¦æ ãããããã */
th,
p,
td {
  background-color: #eeeeee;
  margin: 0px;
  padding: 6px;
  font-family: sans-serif;
  text-align: left;
}