CSS网格和指定多个区域

Question

我需要我的一些元素重叠，我还想按区域名称而不是行/列来指定内容，因为这样可以更好地阅读。

我一辈子都无法理解如何按照 MDN 示例指定多个网格区域。或者如果它甚至可能，文章根据语法示例建议它可能，但它实际上是如何工作的？一点线索都没有。

示例问题:

document.querySelector("input").focus();

#my_grid {
  display:grid;
  grid-gap:5px;
  grid-template-rows: 50px 50px 50px;
  grid-template-columns: 50px 50px 50px;
  grid-template-areas:  "a b c"
                        "d e f"
                        "g h i";

}

#my_grid > div {
  text-align:center;
  line-height:50px;
  border:1px solid rgba(0,0,0,0.3);
  background-color:rgba(0,0,0,0.1);
}

<div id="my_grid">
  <div style="grid-area:a">a</div>
  <div style="grid-area:b">b</div>
  <div style="grid-area:c">c</div>
  <div style="grid-area:d">d</div>
  <div style="grid-area:e">e</div>
  <div style="grid-area:f">f</div>
  <div style="grid-area:g">g</div>
  <div style="grid-area:h">h</div>
  <div style="grid-area:i">i</div>
  <input type="text" onKeyUp="this.style.gridArea = this.value" style="grid-area:d / e" value="d / e">
</div>

Type your own area

我希望我的输入涵盖区域 d 和 e，指定 d/e 只是将其放入 e。

Answer 1

您需要指定 4 个值，例如 grid-area: d / d / d / e这意味着:

grid-row-start: d;
grid-column-start: d; /* Start at d */
grid-row-end: d;
grid-column-end: e; /* End at e */

document.querySelector("input").focus();

#my_grid {
  display:grid;
  grid-gap:5px;
  grid-template-rows: 50px 50px 50px;
  grid-template-columns: 50px 50px 50px;
  grid-template-areas:  "a b c"
                        "d e f"
                        "g h i";

}

#my_grid > div {
  text-align:center;
  line-height:50px;
  border:1px solid rgba(0,0,0,0.3);
  background-color:rgba(0,0,0,0.1);
}

<div id="my_grid">
  <div style="grid-area:a">a</div>
  <div style="grid-area:b">b</div>
  <div style="grid-area:c">c</div>
  <div style="grid-area:d">d</div>
  <div style="grid-area:e">e</div>
  <div style="grid-area:f">f</div>
  <div style="grid-area:g">g</div>
  <div style="grid-area:h">h</div>
  <div style="grid-area:i">i</div>
  <input type="text" onKeyUp="this.style.gridArea = this.value" style="grid-area: d / d / d / e" value="d / d / d / e">
</div>

Type your own area

只有两个值 grid-area: d / e你有:

grid-row-start: d;
grid-column-start: e;
grid-row-end: d;
grid-column-end: e; 

所以这基本上会将元素定位在有d 的行的交集处。和有 e 的列(只有一个单元格是 e )。

grid-area: a / i会把你带到这个区域c例如。

来自 t he specification :

The grid-template-areas property generates implicitly-assigned line names from the named grid areas in the template. For each named grid area foo, four implicitly-assigned line names are created: two named foo-start, naming the row-start and column-start lines of the named grid area, and two named foo-end, naming the row-end and column-end lines of the named grid area.

然后

<custom-ident>

First attempt to match the grid area’s edge to a named grid area: if there is a named line with the name <custom-ident>-start (for grid-*-start) / <custom-ident>-end (for grid-*-end), contributes the first such line to the grid item’s placement.