~ selector在css中，~选择器用于选择在html dom中位于所需元素之前的所有元素。
语法el1~el2 { css declarations}
in this context, el1 symbolizes the preceding component of the fellow components, whereas el2 represents the subsequent fellow components located in a shared parental unit.
for example, a ~ ul, selects every <ul> element preceded by the <a> element.
::before选择器the ::before selector is used to insert come content before the selected element.
语法el::before { css declarations}
here, el is the element that the ::before pseudo-element will be applied to. the ::before pseudo-element is preceded by two colons (::) to distinguish it from the :before pseudo-class, which is an older syntax that is still supported for backward compatibility.
例如，p::before会在<p>元素之前添加内容。
方法the approach to add commas between a list of items dynamically with css involves the use of a pseudo-element called ::before that can insert content before the selected element. in this case, we target the li elements within a ul list and add a comma before each one using the ::before selector. this method allows us to avoid manually adding commas to the list and automate the process with css. additionally, we can use the display and flex-wrap properties to arrange the list items and ensure they wrap to a new line if necessary. finally, we can use javascript to add and remove list items dynamically.
example的中文翻译为：示例以下代码使用css在一组项目之间动态添加逗号。文档包括一个标题，带有css属性的样式标签，以及一个包含标题、具有类名为“item”的项目列表和两个用于添加和删除项目的按钮的div标签。样式标签包括一个伪元素选择器，在每个列表项之前（除了第一个）添加逗号和空格。脚本标签定义了两个函数；additem函数添加一个带有文本“item！”的新列表项，removeitem函数随机选择一个列表项并将其删除。
<!doctype html><html><head> <style> .items { display: flex; list-style: none; padding: 0; flex-wrap: wrap } .item~.item::before { content: , ; } </style></head><body> <h4>how to add commas between a list of items dynamically with css?</h4> <div> <ul class=items> <li class=item>eggs</li> <li class=item>bread</li> </ul> </div> <div> <button onclick=additem()>add item</button> <button onclick=removeitem()>remove item</button> </div> <script> function removeitem(){ let items=document.queryselectorall('.item'); let idx=math.floor(math.random()*items.length); items[idx].remove(); } function additem(){ let itemlist=document.queryselector(.items); let item=document.createelement(li); item.innertext=item!; item.classname=item; itemlist.append(item); } </script></body></html>
结论总结一下，利用css在文章串中动态包含逗号的使用是一种聪明的策略，它能够提高网页的可读性和视觉吸引力。通过利用css的少用技能，网页设计师可以解决看似琐碎的问题。通过发挥想象力和探索新的可能性的热情，您可以利用css的潜力来创建引人注目和艺术性的壮丽网页设计，给观众留下深刻的印象。因此，请毫不犹豫地尝试各种可用工具和技术，并发挥您的网页开发专业知识的全部潜力。
以上就是如何使用 css 在项目列表之间动态添加逗号？的详细内容。