网格元素使用 CSS 展开动画

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 "cells"，当扩展到视图的整个区域时，它会动画化，就好像它的 "pushing" 相邻元素不在视图中一样。

我正在尝试结合使用宽度、高度和变换来提供适当的动画，但变换似乎会产生一些意想不到的结果...

有没有办法在不使用 position:absolute 或使用尽可能少的 javascript 的情况下完成此操作？？

Answer 1

这是一个看似做你想做的事情的例子，从头开始编码，没有任何 JavaScript。我使用 flexbox 而不是网格，但它也可以用网格来实现。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>

您可以尝试 flex-grow，更改动画或悬停元素与非悬停元素之间的比例，但为此，您需要比 [=38= 更好地定义要求]:

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方面是灵活的。这是一个示例，在垂直和水平方向上都扩展到完整：

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>

一般来说，我会避免使用完整的 width/full 高度，因为这会使选择其他项目变得更加困难。

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