防止 CSS 网格中的双边框

Question

鉴于当前的 CSS 网格示例，我如何折叠边框以避免双边框？

使用 Html table 即可轻松实现。我该如何使用 display: grid ?

.wrapper {
  display: grid;
  grid-template-columns: 50px 50px 50px 50px;
}

.wrapper > div {
  padding: 15px;
  text-align: center;
  border: 1px solid black;
}

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

Answer 1

.wrapper {
  display: grid;
  grid-template-columns: 50px 50px 50px 50px;
}

.wrapper > div {
  padding: 15px;
  text-align: center;
  border: 1px solid black;
  margin:0 -1px -1px 0;
}

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

margin:0 -1px -1px 0;

这应该可以解决问题。

Answer 2

你可以这样做:

.wrapper {
  display: inline-grid;
  grid-template-columns: 50px 50px 50px 50px;
  border-bottom: 1px solid black;
  border-left: 1px solid black;
}

.wrapper > div {
  padding: 15px;
  text-align: center;
  border-top: 1px solid black;
  border-right: 1px solid black;
}

body {
 background:pink;
}

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

另一种想法是依靠渐变来填补空白，如下所示：

.wrapper {
  display: inline-grid;
  grid-template-columns: 50px 50px 50px 50px;
  grid-gap:1px;
  background:
    linear-gradient(#000,#000) center/100% 1px no-repeat,
    repeating-linear-gradient(to right,transparent 0 50px,#000 0 51px);
  border:1px solid;
}

.wrapper > div {
  padding: 15px;
  text-align: center;
}

body {
 background:pink;
}

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

您还可以调整初始解决方案以使其更加灵活，并且它适用于一行内任意数量的项目。

运行下面的代码放在整页上并调整大小 window:

.wrapper {
  display: grid;
  max-width:800px;
  grid-template-columns: repeat(auto-fill,minmax(100px,1fr));
  border-top: 1px solid black;
  border-left: 1px solid black;
}

.wrapper > div {
  padding: 15px;
  text-align: center;
  border-bottom: 1px solid black;
  border-right: 1px solid black;
}

body {
 background:pink;
}

<div class="wrapper">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
  <div>6</div>
  <div>7</div>
  <div>8</div>
  <div>9</div>
  <div>10</div>
  <div>11</div>
</div>

Answer 3

不要在网格项目周围使用实际边框，而是使用容器上的背景颜色（对于 "border" 颜色）和 grid-gap 属性（对于 "border"宽度）。

.wrapper {
  display: inline-grid;
  grid-template-columns: 50px 50px 50px 50px;
  border: 1px solid black;
  grid-gap: 1px;
  background-color: black;
}

.wrapper > div {
  background-color: white;
  padding: 15px;
  text-align: center;
}

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

Answer 4

我找到了使用 outline 属性的解决方案。

.grid {
 width: 100%;
 height: 700px;
 display: grid;
 grid-template-columns: repeat(4, 25fr);
 grid-template-rows: repeat(4, 25fr);
 margin-bottom: 30px;
 grid-gap: 1px;
}

.grid-item {
 background-color: silver;
 outline: 1px solid gray; /* The outline creates the border */
 text-align: center;
 position: relative;
 z-index: 1; /* original z-index */
}

/* If you want to change the color on the hover state */
.grid-item:hover {
 outline: 1px solid red;
 z-index: 2; /* You must apply a z-index bigger than the original z-index or else some parts of the outline will be behind other grid elements */
}

<div class="grid">
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
  <div class="grid-item"></div>
</div>

Answer 5

我成功使用的方法是简单地向网格项添加框阴影，以及列和行间隙。然后，这允许列大小始终与 grid-template-columns 中确定的完全相同。然后只需更改列和行间距以及框阴影大小即可获得更粗的边框。

.wrapper {
  display: grid;
  grid-template-columns: 50px 50px 50px 50px;
  grid-column-gap: 1px;
  grid-row-gap: 1px;
}
.wrapper > div {
  padding: 15px;
  text-align: center;
  box-shadow: 0 0 0 1px;
}

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

Answer 6

双赢密码为设置

网格项目：border-bottom & border-right
网格包装器：上边框和左边框

因此即使顶部列不等于底部列也会更正

.wrapper {
  display: inline-grid;
  grid-template-columns: 50px 50px 50px 50px;
  border-top: 1px solid black;
  border-left: 1px solid black;
}

.wrapper > div {
  padding: 15px;
  text-align: center;
  border-bottom: 1px solid black;
  border-right: 1px solid black;
}

<div class="wrapper">
  <div>1</div>
  <div>2</div>
  <div>3</div>
  <div>4</div>
  <div>5</div>
  <div>6</div>
  <div>7</div>
</div>

Answer 7

有一个简单的方法可以做到这一点：

.grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-gap: 1px;
}

.grid__item {
  border: 1px solid gray;
  box-sizing: content-box;
  width: 100%;
  height: 100%;
}

<div class="grid">
  <div class="grid__item">1</div>
  <div class="grid__item">2</div>
  <div class="grid__item">3</div>
  <div class="grid__item">4</div>
  <div class="grid__item">5</div>
  <div class="grid__item">6</div>
  <div class="grid__item">7</div>
  <div class="grid__item">8</div>
  <div class="grid__item">9</div>
  <div class="grid__item">10</div>
  <div class="grid__item">11</div>
  <div class="grid__item">12</div>
</div>

P.s。这里的主要技巧在box-sizing: content-box。如果您不使用其他值全局覆盖它，则不需要它。但是很多人用的是border-box，这样的话，这个override就解决了gap的问题。

Answer 8

如果您要固定每行的项目数，此解决方案将适合您，

此示例每行 3 个，但您可以编辑

.grid-container {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  grid-template-rows: 1fr;
  gap: 0;
  grid-template-areas: '. . .';
}

.grid-item {
  order: 0;
  flex: 0 1 auto;
  text-align: center;
  padding: 1rem;
  font-size: 12px;
  background-color: #e8e8e8;
  border-color: #000;
  border-style: solid;
  border-width: 0;

  border-right-width: 1px;
  border-bottom-width: 1px;
}

/*first 3 items*/
  .grid-item:nth-child(-n + 3) {
    border-top-width: 1px;
  }

/*last item on each row*/
  .grid-item:nth-child(3n + 0) {
    border-right-width: 1px;
    background-color: cadetblue;
  }
  
/*first item on each row*/

.grid-item:first-child,
  .grid-item:nth-child(3n + 1) {
    border-left-width: 1px;
    background-color: red;
  }
  
/*middel item on each row (not used)*/
  .grid-item:nth-child(3n - 1) {
   // border-left-width: 1px;
   background-color: yellow;
  }

/*last item (not used)*/
  .grid-item:last-child {
   // border-left-width: 0;
    background-color: green
    }

<div class="grid-container">

<div class="grid-item"> 1 </div>

<div class="grid-item"> 2 </div>

<div class="grid-item"> 3 </div>

<div class="grid-item"> 1 </div>

<div class="grid-item"> 2 </div>

<div class="grid-item"> 3 </div>

<div class="grid-item"> 1 </div>

<div class="grid-item"> 2 </div>


</div>

防止 CSS 网格中的双边框

Preventing double borders in CSS Grid

html

css

css-grid