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表实现这是一件非常简单的事情。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>
答案 0 :(得分：21)
不使用网格项周围的实际边框，而是使用容器上的背景颜色（用于“边框”颜色）和grid-gap属性（用于“边框”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>
答案 1 :(得分：10)
您可以这样做：
.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>
另一个想法是依靠渐变来填补下面的空白：
.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 ,transparent 50px,
#000 50px,#000 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>
答案 2 :(得分：8)
.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。
答案 3 :(得分：3)
我通过使用outline属性找到了解决方案。
.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>
答案 4 :(得分：1)
我成功使用的方法只是在网格项中添加框阴影以及列和行间距。然后，这允许列大小始终完全与grid-template-columns中确定的大小相同。
然后，只需更改列和行的间隙以及框阴影的大小，即可获得较粗的边框。
.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>
答案 5 :(得分：1)
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。这里的主要技巧是在box-sizing: content-box中。如果您没有用另一个值全局覆盖它，则不需要它。但是很多人使用border-box，在这种情况下，这种覆盖解决了差距问题。
答案 6 :(得分：0)
将设置双赢代码
因此即使顶部的列与底部的列不相等
.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>
答案 7 :(得分：-1)
如果您将固定每行的项目数，此解决方案将适合您，
此示例为每行 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>