我做了一個JSFiddle來重現這個問題。

我試圖讓一個網格元素在懸停時增長，但它導致了這個奇怪的問題，它在另一個網格元素下，然后跳到我期望的樣子。

為什么會出現這種情況，有沒有辦法解決？

.container {
  height: 100vh;
  width: 100vw;
  display: grid;
  grid-template: 1fr / 1fr 1fr;
  margin: 1em;
  grid-gap: 1em;
}

.box {
  height: 100%;
  width: 100%;
  transition: width 0.5s;
}

.one {
  background: pink;
}

.two {
  background: red;
}

.box:hover {
  width: 60vw;
}

<div class="container">
  <div class="box one"></div>
  <div class="box two"></div>
</div>

您可以使用具有flex速記屬性的flexbox:

.container {
  display: flex;
  gap: 1em;
  margin: 1em;
}

.box {
  flex: 1; /* This makes boxes take equal space by default */
  transition: 0.5s;
}

.box:hover {
  flex: 2; /* A hovered box expands twice as fast as a non-hovered */
}

試試看:

.container {
  display: flex;
  gap: 1em;
  margin: 1em;
}

.box {
  flex: 1;
  transition: 0.5s;
}

.box:hover {
  flex: 2;
}


/* Demo only */

body {
  margin: 0;
}

.container {
  height: 100vh;
}

.box {
  height: 100%;
}

.one {
  background: pink;
}

.two {
  background: red;
}

<div class="container">
  <div class="box one"></div>
  <div class="box two"></div>
</div>

我已經寫了一篇關于這種效果的詳細文章，我邀請你閱讀來理解如何使用CSS網格:https://css-tricks.com/zooming-images-in-a-grid-layout/來實現這種效果

.container {
  height: calc(100vh - 2em);
  display: grid;
  grid-template-columns: auto auto;
  margin: 1em;
  gap: 1em;
}
.box {
  width: 0;
  min-width: 100%;
  transition: width 0.5s;
}
.box:hover {
  width: 40vw; /* read the article to understand the math behind setting this value */
}

.one {background: pink;}
.two {background: red;}

body {
  margin: 0;
}

<div class="container">
  <div class="box one"></div>
  <div class="box two"></div>
</div>