html - 没有 javascript 的 元素列表

Question

我在响应式设计网页(使用 css3 和 flexbox)中的移动(小显示器)版本中显示下拉菜单时遇到问题

我有一个 11 <li>元素。第一个元素只是显示菜单按钮和 10 个带有任务的下一个元素。在经典网络版本中，我没有显示“菜单”按钮，只有任务。但在移动版本中，我只显示“菜单”按钮，我想在悬停 或单击 后显示任务(而不是单击)，而不是 javascirpt。请问有可能吗？我正在使用 li:first-child {display:none;} 的 css3 flexbox经典版和li {display:none;} li:first-child {display:block;}在移动版本中。

HTML

<nav class="menu">
                <ul id="menu">
                    <li><i class="mdi mdi-menu"></i>Menu</a></li>
                    <li><i class="mdi mdi-lock-open"></i><a href="#">1. A mystery to begin with</a></li>
                    <li><i class="mdi mdi-lock-open"></i><a href="#">2. Running out of water!</a></li>
                    <li><i class="mdi mdi-lock-open"></i><a href="#">3. A message from Sir Cogwheel</a></li>
                    <li><i class="mdi mdi-lock-open"></i><a href="#">4. The treasure hunt</a></li>
                    <li><i class="mdi mdi-lock"></i>5. A dangerous drink</li>
                    <li><i class="mdi mdi-lock"></i>6. Think, think, think, …</li>
                    <li><i class="mdi mdi-lock"></i>7. Keep your eyes open</li>
                    <li><i class="mdi mdi-lock-open"></i><a href="#">8. A safe deposit</a></li>
                    <li><i class="mdi mdi-lock-open"></i><a href="#">9. The preparation</a></li>
                    <li><i class="mdi mdi-lock-open"></i><a href="#">10. Get him!</a></li>
                </ul>
            </nav>

CSS

ul {
    padding: 0; margin: 0;
    list-style-type: none;
    display: flex;
    flex-direction: column; /*--This is basic setting, we can ignore it later. It's just tu show different between column and row */
}

li {
    background-color: #555;
    opacity: 0.7;
    color: #aaa;
    padding: 0.5em 0.5em;
    margin: 0.3em 0.5em;
    border-radius: 0.5em;
    width: 17em;
}

li:first-child {
    display: none;
    color:white;
}

@media screen and (max-width: 950px) {
   .menu {
        display: inline-block;
        flex: 1;
    }

    ul {        
        flex-direction: row;
    }

    li {
        display: none;
    }

    li:first-child {
        display: inline-block;
        flex: 1;
    }

    li:first-child:hover li {
            background-color: red;
            display: block;
    }
}

您可以在这里看到所有代码:https://codepen.io/oslicek/pen/VJJVZE?editors=1111

与li:first-child:hover 之后的li 元素无关手机版

谢谢你的建议

Answer 1

这只是概念验证，因此外观是次要的；) 不幸的是，为了能够在 css 中完成，您必须稍微修改 html。

html {
  background: white;
  color: black;
  font-family: 'Roboto', sans-serif;
}

html,
body {
  padding: 0;
  margin: 0;
}

header {
  background-color: lightskyblue;
  font-family: 'Comfortaa', cursive;
  height: 5em;
  display: flex;
  align-items: center;
  justify-content: center;
}

article {
  width: 100%;
  padding: 1em 0.5em;
}

footer {
  background-color: #444;
  color: white;
  font-weight: bold;
  font-size: 0.9em;
  display: flex;
  height: 32px;
  align-items: center;
  justify-content: right;
  padding: 0.5em;
}

h1 {
  text-transform: uppercase;
}

ul {
  padding: 0;
  margin: 0;
  list-style-type: none;
  display: flex;
  flex-direction: column;
  /*--This is basic setting, we can ignore it later. It's just tu show different between column and row */
}

li {
  background-color: #555;
  opacity: 0.7;
  color: #aaa;
  padding: 0.5em 0.5em;
  margin: 0.3em 0.5em;
  border-radius: 0.5em;
  width: 17em;
}

li:hover {
  cursor: pointer;
  background-color: #06a;
}

img {
  border-radius: 0.5em;
}

a {
  color: white;
  text-decoration: none;
}

.content {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('https://images.unsplash.com/photo-1524654458049-e36be0721fa2?ixlib=rb-1.2.1&q=85&fm=jpg&crop=entropy&cs=srgb&ixid=eyJhcHBfaWQiOjE0NTg5fQ') no-repeat;
  background-size: 100% 100%;
  display: flex;
  flex-shrink: 1;
}

.news-block {
  display: flex;
  flex-wrap: wrap;
  margin-top: 1em;
}

.news-block:first-child {
  margin-top: 0;
}

.news-picture {
  margin-right: 0.5em;
  border-radius: 1.2em;
}

.news-date {
  background-color: orange;
  border-radius: 1.2em;
  padding: 0.5em 0.5em;
  color: black;
  font-weight: bold;
  margin-right: 0.5em;
}

.news-description {
  flex: 1;
  padding: 0.5em 0.5em;
  border-radius: 1.2em;
  background: linear-gradient(rgba(255, 255, 255, 0.6), rgba(255, 255, 255, 0.6));
  color: black;
}

.mdi {
  padding-right: 0.3em;
}

#menu-button {
  display: none;
}

.checkbox input[type="checkbox"] {
  opacity: 0;
}

@media screen and (max-width: 950px) {
  .content {
    flex-wrap: wrap;
  }
  .menu-button {
    display: block;
    border: 1px solid red;
    color: #fff;
    width: 100%;
    cursor: pointer;
  }
  #menu {
    display: none;
  }
  .checkbox label {
    position: relative;
    display: inline-block;
    color: #fff;
  }
  .checkbox input[type="checkbox"]:checked~#menu {
    display: block;
  }
  li:first-child:hover li {
    background-color: red;
    display: block;
  }
}

<div class="container">
  <header class="header">
    <h1>Mysterious Game</h1>
  </header>
  <div class="content">
    <nav class="menu">
      <div class="checkbox">
        <input type="checkbox" id="menu-button">
        <label for="menu-button">Menu</label>
        <ul id="menu">
          <li><i class="mdi mdi-lock-open"></i><a href="#">1. A mystery to begin with</a></li>
          <li><i class="mdi mdi-lock-open"></i><a href="#">2. Running out of water!</a></li>
          <li><i class="mdi mdi-lock-open"></i><a href="#">3. A message from Sir Cogwheel</a></li>
          <li><i class="mdi mdi-lock-open"></i><a href="#">4. The treasure hunt</a></li>
          <li><i class="mdi mdi-lock"></i>5. A dangerous drink</li>
          <li><i class="mdi mdi-lock"></i>6. Think, think, think, …</li>
          <li><i class="mdi mdi-lock"></i>7. Keep your eyes open</li>
          <li><i class="mdi mdi-lock-open"></i><a href="#">8. A safe deposit</a></li>
          <li><i class="mdi mdi-lock-open"></i><a href="#">9. The preparation</a></li>
          <li><i class="mdi mdi-lock-open"></i><a href="#">10. Get him!</a></li>
        </ul>
      </div>
    </nav>
    <article class="article">
      <div class="news">
        <div class="news-block">
          <div class="news-picture">
            <img src="https://66.media.tumblr.com/61ee19e9fbdf3cdc26914a55913ca589/tumblr_pnt0xjw4WE1s2brnwo1_640.jpg" alt="news-picture" width="150">
          </div>
          <div class="news-date">19.06.2019</div>
          <div class="news-description">
            Register you fursuit today!
          </div>
        </div>
        <div class="news-block">
          <div class="news-picture">
            <img src="https://pbs.twimg.com/media/CnVspVNW8AUjSDh.jpg" alt="news-picture" width="150">
          </div>
          <div class="news-date">17.06.2019</div>
          <div class="news-description">
            Registration will be opened so quickly. Please stay tuned!
          </div>
        </div>
      </div>
    </article>
  </div>
  <footer class="footer">
    Footer of webpage
  </footer>
</div>