填充 CSS 网格布局中的空单元格

Question

我有一组 div 块，我已通过 CSS 网格布局尽可能 "automatically" 排列；我的最终想法是，即使我不知道有多少块瓷砖，它们都会正确调整大小和放置。这工作正常。

现在，我希望将单击的任何图块的面积加倍。据我所知，这意味着增加此图块的跨度：

grid-row: span 2;
grid-column: span 2;

如果我单击不在最右侧列中的任何图块，我对结果很满意。当最右边的图块展开时，它们会被包裹到下一行。

有什么方法可以强制这些图块向左展开，从而包裹其他非活动图块吗？

Codepen 示例 here

$('div.tile').click(function() {
  $('div.tile').not(this).removeClass('chosen');
  $(this).toggleClass('chosen');
  
  /*
Attempt to find current placement, to see if we could change the span rules based on results. Probably disregard.
  */
  var colCount = $('div.wrapper').css('grid-template-columns').split(' ').length;
  console.log(colCount);
  
  var placement = $(this).css('grid-row');
  console.log(placement);
});

body {
  margin: 0;
  padding: 0;
  background-color: #eee;
}

.wrapper {
  display: grid;
  margin: 18px;
  
  grid-template-columns: repeat(auto-fill, minmax(252px, 1fr));
  grid-auto-rows: 286px;
  grid-gap: 18px;
}

.tile {
  position: relative;
  background-color: #eee;
  background-color: #149;
  
  text-align: center;
  box-shadow:
    0 3px 12px rgba(0,0,0, 0.15),
    0 4px 6px rgba(0,0,0, 0.25);
}
.tile.chosen {
  grid-row: span 2;
  grid-column: span 2;
}
.tile.chosen::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  content: " ";
  background-color: rgba(255,255,255,.2);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrapper">
  <div class="tile">A</div>
  <div class="tile">B</div>
  <div class="tile">C</div>
  <div class="tile">D</div>
  <div class="tile">E</div>
  <div class="tile">F</div>
  <div class="tile">G</div>
  <div class="tile">H</div>
  <div class="tile">I</div>
</div>

Answer 1

使用 CSS 网格自动放置

CSSgrid-auto-flow属性控制自动放置的网格项在网格中的放置方式。

这个属性有三个可能的值：

row（默认）
column
dense

使用 dense，自动放置算法会用适合的项目填充未占用的单元格。

这是您的代码，在网格容器上有 grid-auto-flow: dense：

$('div.tile').click(function() {
  $('div.tile').not(this).removeClass('chosen');
  $(this).toggleClass('chosen');
  var colCount = $('div.wrapper').css('grid-template-columns').split(' ').length;
  console.log(colCount);
  var placement = $(this).css('grid-row');
  console.log(placement);
});

body {
  margin: 0;
  padding: 0;
  background-color: #eee;
}

.wrapper {
  display: grid;
  margin: 18px;
  grid-template-columns: repeat(auto-fill, minmax(252px, 1fr));
  grid-auto-rows: 286px;
  grid-gap: 18px;
  grid-auto-flow: dense; /* NEW */
}

.tile {
  position: relative;
  background-color: #eee;
  background-color: #149;
  text-align: center;
  box-shadow: 0 3px 12px rgba(0, 0, 0, 0.15), 0 4px 6px rgba(0, 0, 0, 0.25);
}

.tile.chosen {
  grid-row: span 2;
  grid-column: span 2;
}

.tile.chosen::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  content: " ";
  background-color: rgba(255, 255, 255, .2);
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="wrapper">
  <div class="tile">A</div>
  <div class="tile">B</div>
  <div class="tile">C</div>
  <div class="tile">D</div>
  <div class="tile">E</div>
  <div class="tile">F</div>
  <div class="tile">G</div>
  <div class="tile">H</div>
  <div class="tile">I</div>
</div>

revised codepen

来自规范：

7.7. Automatic Placement: the grid-auto-flow property

Grid items that aren’t explicitly placed are automatically placed into an unoccupied space in the grid container by the auto-placement algorithm.

grid-auto-flow controls how the auto-placement algorithm works, specifying exactly how auto-placed items get flowed into the grid.

row

The auto-placement algorithm places items by filling each row in turn, adding new rows as necessary. If neither row nor column is provided, row is assumed.

column

The auto-placement algorithm places items by filling each column in turn, adding new columns as necessary.

dense

If specified, the auto-placement algorithm uses a “dense” packing algorithm, which attempts to fill in holes earlier in the grid if smaller items come up later. This may cause items to appear out-of-order, when doing so would fill in holes left by larger items.

使用 CSS 网格已定义放置

CSS 网格规范提供了许多用于调整和定位网格项目的属性和方法。因此，如果您不必依赖自动放置，请使用定义的放置以获得更多控制。

grid-container {
  display: grid;
  grid-template-rows: repeat(4, 25%);
  grid-template-columns: repeat(4, 25%);
  grid-gap: 5px;
  width: 400px;
  height: 400px;
}

[left]:hover {
  grid-column: -1 / -3;
  grid-row: 1 / 2;
  background-color: orange
}

[right]:hover {
  grid-column: 1 / 3;
  grid-row: 2 / 3;
  background-color: orange
}

[down]:hover {
  grid-column: -1 / -2;
  grid-row: 2 / 4;
  background-color: orange
}

[up]:hover {
  grid-column: 3 / 4;
  grid-row: -4 / -2;
  background-color: orange
}

grid-item {
  background-color: lightgreen;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

<grid-container>
  <grid-item></grid-item>
  <grid-item></grid-item>
  <grid-item></grid-item>
  <grid-item left>HOVER<br>to go left</grid-item>
  <grid-item right>HOVER<br>to go right</grid-item>
  <grid-item></grid-item>
  <grid-item></grid-item>
  <grid-item down>HOVER<br>to go down</grid-item>
  <grid-item></grid-item>
  <grid-item></grid-item>
  <grid-item up>HOVER<br>to go up</grid-item>
  <grid-item></grid-item>
</grid-container>

填充 CSS 网格布局中的空单元格

Filling empty cells in CSS Grid Layout

javascript

jquery

css

css-grid

使用 CSS 网格自动放置

使用 CSS 网格已定义放置

填充 CSS 网格布局中的空单元格

Filling empty cells in CSS Grid Layout

javascript

jquery

css

css-grid

使用 CSS 网格 自动 放置

使用 CSS 网格 已定义 放置

使用 CSS 网格自动放置

使用 CSS 网格已定义放置