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javascript – 在CSS网格布局中填充空单元格

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内容图文

我有一组div瓷砖,我通过CSS网格布局尽可能“自动”排列;我最后的想法是,即使我不知道有多少瓷砖,它们都可以调整大小并正确放置.这工作正常.

现在,我希望将所点击的任何图块的区域加倍.据我所知,这意味着增加这个瓷砖的范围：

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

如果我点击不在最右侧列中的任何图块,我对结果感到满意.当最右边的瓷砖展开时,它们会被包裹到下一行.

有没有办法强制这些瓷砖向左扩展,以便包裹其他非活动瓷砖？

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>

解决方法:

使用CSS网格自动放置

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

此属性有三个可能的值：

>行(默认值)
>专栏
>密集

对于密集,自动放置算法使未占用的单元格填充适合的项目.

这是你的代码,网格自动流：网格容器密集：

$('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

从规格：

07001

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网格定义的放置

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

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>

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