网格元素使用CSS扩展动画

Question

我有以下

setTimeout(function(){
var sections = document.querySelectorAll('section'), main = document.querySelector('.grid-container'), 
//section = sections[Math.floor(Math.random() * 3)];
section = sections[1];
section.classList.add('expand');
section.parentElement.classList.add('expand');
main.classList.add('expanding');
}, 2000);

*{
	box-sizing : border-box; 
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale; 
}

.grid-container {
  width:100%;
  height: 100vh;
  display:flex;
  border: 1px solid;
  flex-wrap: wrap;
  flex-direction: column;
}

.grid-row, .grid-container {
  
  overflow:hidden;
}

.grid-column, .grid-row {
  display: flex;
  transition: width .2s, height .2s, margin .2s, transform .2s;
}

.grid-column {
  width: inherit;
  height: inherit;
  align-items: center;
  justify-items: center;
}

.grid-column:nth-child(1) {
  background-color:green;
}

.grid-column:nth-child(2) {
  background-color:orange;
}
.grid-row:nth-child(2) .grid-column:nth-child(1) {
  background-color:violet;
}

.grid-row:nth-child(2) .grid-column:nth-child(2) {
  background-color:brown;
}

@media screen and (orientation: portrait) {
  .grid-row {
    width: 100%;
    height: 50%;
    flex-direction: column;
  }
  
  .grid-column {
    width: 100%;
    height: 50%;
  }
  
  .grid-row.expand .grid-column {
    transform: translateY(-50%);
  }
 
}

@media screen and (orientation: landscape) {
  .grid-row {
    width: 50%;
    height: 100%;
  }
  
  .grid-column {
    width: 50%;
    height: 100%;
  }
}

@media screen and (min-height: 500px) {
  .grid-row {
    height: 50%;
    width: 100%;
  }
}

.expanding .expand {
  width: 100% !important;
  height: 100% !important;
}

<main class="grid-container">
<div class="grid-row" data-index="1">
  <section class="grid-column" data-index="1">
    <article>
      <p>
      1
      </p>
    </article>
  </section>
  <section class="grid-column" data-index="2">
    <article>
      <p>
      2
      </p>
    </article>
  </section>
  </div>
  <div class="grid-row" data-index="2">
  <section class="grid-column" data-index="1">
    <article>
      <p>
      3
      </p>
    </article>
  </section>
  <section class="grid-column" data-index="2">
    <article>
      <p>
      4
      </p>
    </article>
  </section>
  </div>
</main>

我正在尝试开发网格中的“单元格”，该单元格在扩展到视图的整个区域时将对其进行动画处理，好像其将“相邻元素”从视图中推出一样。

我正在尝试使用宽度，高度和变换的组合来提供适当的动画，但是变换似乎会产生一些意外的结果...

有没有一种方法可以不用position:absolute或使用尽可能少的javascript来实现？

Answer 1

这是一个似乎在做您想要的示例的示例，该示例从头开始编码，没有任何JavaScript。我使用flexbox代替了grid，但是也可以使用grid来实现。我使用:hover作为触发器：

body {
  padding: 15px;
  background-color: #999;
  margin: 0;
}

.grid>*:hover, 
.grid>*>*:hover {
  flex-grow: 3;
}

.grid>*>*:hover {
  box-shadow: 0 4px 5px -2px rgba(0, 0, 0, .2), 0 7px 10px 1px rgba(0, 0, 0, .14), 0 2px 16px 1px rgba(0, 0, 0, .12);
  z-index: 1;
  opacity: 1;
  font-size: 5rem;
}
.grid:hover>*:not(:hover) {
  flex-grow: 0;
  max-height: 0;
  overflow: hidden;
}
.grid>*,
.grid>*>* {
  transition: all .6s cubic-bezier(0.5, 0, 0.3, 1);
}

.grid {
  flex-direction: column;
  min-height: calc(100vh - 30px);
  box-sizing: border-box;
}

.grid,
.grid>* {
  display: flex;
  max-height: 100%;
}

.grid>* {
  flex-direction: row;
  margin: 0;
}

.grid>*,
.grid>*>* {
  flex-grow: 1;
}

.grid>*>* {
  margin: 0;
  z-index: 0;
  position: relative;
  background-color: #fff;
  outline: 1px solid #ddd;
  opacity: .95;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
  font-size: 3rem;
  overflow: hidden;
}

<div class="grid">
  <div>
    <div>1</div>
    <div>2</div>
  </div>
  <div>
    <div>3</div>
    <div>4</div>
    <div>5</div>
    <div>6</div>
  </div>
  <div>
    <div>7</div>
    <div>8</div>
    <div>9</div>
  </div>
</div>

您可以试玩flex-grow，更改动画或悬停元素与未悬停元素之间的比例，但是，为此，您需要定义比“似乎要提供一些意外结果”更好的要求：

您显然可以将其限制为2 + 2个元素。我只是想指出它在结构上很灵活。这是一个示例，它在垂直和水平方向都扩展到完全：

body {
  padding: 15px;
  background-color: #999;
  margin: 0;
}

.grid>*:hover, 
.grid>*>*:hover {
  flex-grow: 3;
}

.grid>*>*:hover {
  box-shadow: 0 4px 5px -2px rgba(0, 0, 0, .2), 0 7px 10px 1px rgba(0, 0, 0, .14), 0 2px 16px 1px rgba(0, 0, 0, .12);
  z-index: 1;
  opacity: 1;
  font-size: 5rem;
}
.grid:hover>*:not(:hover) {
  flex-grow: 0;
  max-height: 0;
  overflow: hidden;
}
.grid>*:hover>*:not(:hover) {
  flex-grow: 0;
  flex-basis: 0;
  overflow: hidden;
}
.grid>*,
.grid>*>* {
  transition: all .6s cubic-bezier(0.5, 0, 0.3, 1);
}

.grid {
  flex-direction: column;
  min-height: calc(100vh - 30px);
  box-sizing: border-box;
}

.grid,
.grid>* {
  display: flex;
  max-height: 100%;
}

.grid>* {
  flex-direction: row;
  margin: 0;
}

.grid>*,
.grid>*>* {
  flex-grow: 1;
}

.grid>*>* {
  margin: 0;
  z-index: 0;
  position: relative;
  background-color: #fff;
  outline: 1px solid #ddd;
  opacity: .95;
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 0;
  font-size: 3rem;
  overflow: hidden;
  max-width: 100%;
  flex-basis: 100%;
  flex-grow: 0;
}

<div class="grid">
  <div>
    <div>1</div>
    <div>2</div>
  </div>
  <div>
    <div>3</div>
    <div>4</div>
  </div>
</div>

通常，我会避免全角/全高，因为这样会使选择其他商品的方式更加困难。