与引导……这个答案(https://stackoverflow.com/a/23005046/1128742)让我想到了这个解决方案:

<ul class="list-unstyled row">
   <li class="col-xs-6">Item 1</li>
   <li class="col-xs-6">Item 2</li>
   <li class="col-xs-6">Item 3</li>
</ul>

http://jsfiddle.net/patrickbad767/472r0ynf/

上面答案中的遗留解决方案不适合我，因为我想影响页面上的多个列表，而答案假设一个列表加上它使用了相当多的全局状态。在这种情况下，我想改变<section class="list-content">中的每个列表:

const columns = 2;
$("section.list-content").each(function (index, element) {
    let section = $(element);
    let items = section.find("ul li").detach();
    section.find("ul").detach();
    for (let i = 0; i < columns; i++) {
        section.append("<ul></ul>");
    }
    let lists = section.find("ul");
    for (let i = 0; i < items.length; i++) {
        lists.get(i % columns).append(items[i]);
    }
});

几年后再来一个答案!

本文地址:http://csswizardry.com/2010/02/mutiple-column-lists-using-one-ul/

HTML:

<ul id="double"> <!-- Alter ID accordingly -->
  <li>CSS</li>
  <li>XHTML</li>
  <li>Semantics</li>
  <li>Accessibility</li>
  <li>Usability</li>
  <li>Web Standards</li>
  <li>PHP</li>
  <li>Typography</li>
  <li>Grids</li>
  <li>CSS3</li>
  <li>HTML5</li>
  <li>UI</li>
</ul>

CSS:

ul{
  width:760px;
  margin-bottom:20px;
  overflow:hidden;
  border-top:1px solid #ccc;
}
li{
  line-height:1.5em;
  border-bottom:1px solid #ccc;
  float:left;
  display:inline;
}
#double li  { width:50%;}
#triple li  { width:33.333%; }
#quad li    { width:25%; }
#six li     { width:16.666%; }

假设多列布局可以很好地与居中布局，证明网格布局与水平间隙。

p { text-align: justify; } ul { display: grid; grid-template-columns: repeat(3, auto); justify-content: space-around; gap: 0 3em; text-transform: capitalize; } <p>In publishing and graphic design, Lorem ipsum is a placeholder text commonly used to demonstrate the visual form of a document or a typeface without relying on meaningful content. Lorem ipsum may be used as a placeholder before final copy is available.</p> <ul> <li>one</li> <li>two</li> <li>three</li> <li>four</li> <li>five</li> <li>six</li> <li>seven</li> <li>eight</li> <li>nine</li> <li>ten</li> </ul> <p>In publishing and graphic design, Lorem ipsum is a placeholder text commonly used to demonstrate the visual form of a document or a typeface without relying on meaningful content. Lorem ipsum may be used as a placeholder before final copy is available.</p>

这是最简单的方法。CSS。

为ul元素添加width。 添加display:inline-block和新列的宽度(应该小于ul宽度的一半)。

ul.list {
  width: 300px;  
}

ul.list li{
  display:inline-block;
  width: 100px;
}

<ul class="list">
    <li>A</li>
    <li>B</li>
    <li>C</li>
    <li>D</li>
    <li>E</li>
</ul>

现代浏览器

利用css3列模块来支持您正在寻找的内容。

http://www.w3schools.com/cssref/css3_pr_columns.asp

CSS:

ul {
  columns: 2;
  -webkit-columns: 2;
  -moz-columns: 2;
}

http://jsfiddle.net/HP85j/8/

遗留的浏览器

不幸的是，对于IE的支持，你将需要一个涉及JavaScript和dom操作的代码解决方案。这意味着每当列表的内容发生更改时，您都需要执行将列表重新排序为列并重新打印的操作。为了简洁起见，下面的解决方案使用jQuery。

http://jsfiddle.net/HP85j/19/

HTML:

<div>
    <ul class="columns" data-columns="2">
        <li>A</li>
        <li>B</li>
        <li>C</li>
        <li>D</li>
        <li>E</li>
        <li>F</li>
        <li>G</li>
    </ul>
</div>

JavaScript:

(function($){
    var initialContainer = $('.columns'),
        columnItems = $('.columns li'),
        columns = null,
        column = 1; // account for initial column
    function updateColumns(){
        column = 0;
        columnItems.each(function(idx, el){
            if (idx !== 0 && idx > (columnItems.length / columns.length) + (column * idx)){
                column += 1;
            }
            $(columns.get(column)).append(el);
        });
    }
    function setupColumns(){
        columnItems.detach();
        while (column++ < initialContainer.data('columns')){
            initialContainer.clone().insertBefore(initialContainer);
            column++;
        }
        columns = $('.columns');
    }

    $(function(){
        setupColumns();
        updateColumns();
    });
})(jQuery);

CSS:

.columns{
    float: left;
    position: relative;
    margin-right: 20px;
}

编辑:

如下所示，这将使列的顺序如下:

A  E
B  F
C  G
D

而OP要求匹配如下的变体:

A  B
C  D
E  F
G

要实现这个变体，你只需将代码更改如下:

function updateColumns(){
    column = 0;
    columnItems.each(function(idx, el){
        if (column > columns.length){
            column = 0;
        }
        $(columns.get(column)).append(el);
        column += 1;
    });
}