css - 没有占据侧边栏的整个宽度

Question

我遇到了 <li> 的问题不占用侧边栏的整个宽度，即左侧有一些未着色的空间(带有 background-color: red; )。我知道空格来自这一行:

padding: 0.5em 0 0.5em 3em;

但我不确定如何在不使用填充的情况下实现相同的效果。我想要这样填充列表项，但我也想要我的内部嵌套 <li> s 占据了侧边栏的整个宽度。

点击 demo 中的“交易”这样你就可以明白我在说什么了。因此，再一次，例如“新交易”应该是红色的，并且应该占据侧边栏的整个宽度，从左到右边缘。

document.addEventListener('DOMContentLoaded', () => {
  let listItems = document.querySelectorAll('nav > ul > li');

  function onListItemClick() {
    for (let listItem of listItems) {
      listItem.classList.remove('active');
      listItem.children[0].classList.remove('dot');
      if (listItem.children.length > 2) {
        listItem.children[2].style.display = 'none';
      }
    }
    this.classList.add('active');
    this.children[0].classList.add('dot');
    if (this.children.length > 2) {
      this.children[2].style.display = 'block';
    }
  }
  listItems.forEach(function(listItem) {
    listItem.addEventListener('click', onListItemClick);
  });
});

.sidebar {
  background-color: #F2F2F2;
  width: 300px;
  height: 100%;
  position: fixed;
  font-family: sans-serif;
}

.sidebar>nav>ul {
  list-style: none;
  line-height: 2em;
  padding: 0;
  margin: 10em 0 0 0;
}

.sidebar>nav>ul>li {
  display: grid;
  grid-template-columns: 25px 1fr;
  color: #959595;
  font-size: 18px;
  padding: 0.5em 0 0.5em 3em;
}

.sidebar>nav>ul>li:hover,
.sidebar>nav>ul>li>ul>li:hover {
  color: #757575;
  font-weight: bold;
  cursor: pointer;
}

.sidebar>nav>ul>li>ul {
  list-style: none;
  padding: 0;
  margin: 0;
  width: 100%;
}

.sidebar>nav>ul>li>ul>li {
  display: block;
  background-color: red;
  color: #959595;
  font-size: 14px;
  width: 200px;
  font-weight: normal;
  padding: 0 0 0 2em;
}

.dot {
  border-radius: 50%;
  background-color: #33ad93;
  width: 10px;
  height: 10px;
  display: inline-block;
  margin: auto;
}

.active {
  color: black !important;
  font-weight: bold;
}

<div class="sidebar">
  <nav>
    <ul>
      <li>
        <span></span>
        <span>Dashboard</span>
      </li>
      <li>
        <span></span>
        <span>Transactions</span>
        <ul style="display:none;">
          <li>New Transaction</li>
          <li>View Transactions</li>
        </ul>
      </li>
      <li>
        <span></span>
        <span>Budgets</span>
      </li>
    </ul>
  </nav>
</div>

Answer 1

试试这个答案。我在样式应用于嵌套列表和嵌套项的两个地方更改了 css 样式。

.sidebar > nav > ul > li > ul {
 list-style: none;
 padding: 0;
 margin: 0;
 margin-left: -3em;
 width: 300px;
}

.sidebar > nav > ul > li > ul > li {
 display: block;
 background-color: red;
 color: #959595;
 font-size: 14px;
 width: calc(100% - 5em);
 font-weight: normal;
 padding: 0 0 0 5em;
}

document.addEventListener('DOMContentLoaded', () => {
  let listItems = document.querySelectorAll('nav > ul > li');
  function onListItemClick() {
    for (let listItem of listItems) {
      listItem.classList.remove('active');
      listItem.children[0].classList.remove('dot');
      if (listItem.children.length > 2) {
        listItem.children[2].style.display = 'none';
      }
    }
    this.classList.add('active');
    this.children[0].classList.add('dot');
    if (this.children.length > 2) {
      this.children[2].style.display = 'block';
    }
  }
  listItems.forEach(function(listItem) {
    listItem.addEventListener('click', onListItemClick);
  });
});

.sidebar {
    background-color: #F2F2F2;
    width: 300px;
    height: 100%;
    position: fixed;
    font-family: sans-serif;
}

.sidebar > nav > ul {
    list-style: none;
    line-height: 2em;
    padding: 0;
    margin: 10em 0 0 0;
}

.sidebar > nav > ul > li {
    background-color: red
    display: grid;
    grid-template-columns: 25px 1fr;
    color: #959595;
    font-size: 18px;
    padding: 0.5em 0 0.5em 3em;
}

.sidebar > nav > ul > li:hover, .sidebar > nav > ul > li > ul > li:hover {
    color: #757575;
    font-weight: bold;
    cursor: pointer;
}


.sidebar > nav > ul > li > ul {
    list-style: none;
    padding: 0;
    margin: 0;
    margin-left: -3em;
    width: 300px;
}

.sidebar > nav > ul > li > ul > li {
    display: block;
    background-color: red;
    color: #959595;
    font-size: 14px;
    width: calc(100% - 5em);
    font-weight: normal;
    padding: 0 0 0 5em;
}

.dot {
    border-radius: 50%;
    background-color: #33ad93;
    width: 10px;
    height: 10px;
    display: inline-block;
    margin: auto;
}

.active {
    color: black !important;
    font-weight: bold;
}

<div class="sidebar">
    <nav>
        <ul>
            <li>
                <span></span>
                <span>Dashboard</span>
            </li>
            <li>
                <span></span>
                <span>Transactions</span>
                <ul style="display:none;">
                    <li>New Transaction</li>
                    <li>View Transactions</li>
                </ul>
            </li>
            <li>
                <span></span>
                <span>Budgets</span>
            </li>
        </ul>
    </nav>
</div>