如何实现带图片内前后导航箭头的弹出式幻灯片？

我要制作一个带幻灯片功能的弹出窗口，但遇到了问题：导航箭头无法放置在图片容器内，导致网站缩放时箭头位置无法保持相对固定。我希望将导航箭头移到图片左右两侧（紧贴图片边缘的位置），实现缩放时箭头跟着图片同步调整位置的效果。

HTML代码片段 #

<div id="popup" class="popup hidden">
  <div class="popup-content">
    <span id="closePopup" class="close">&times;</span>
    <button id="prevImage" class="nav-button">&lt;&lt;/button>
    <img id="popupImage" src="" alt="Project Image">
    <button id="nextImage" class="nav-button">&gt;</button>
    <div class="popup-text">
      <p id="popupName"></p>
      <p id="popupDescription"></p>
    </div>
  </div>
</div>

CSS代码片段 #

/* Popup */
.popup {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  overflow: auto;
  background-color: rgba(0,0,0,0.5);
}

.popup-content {
  background-color: #494949;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 20px;
  padding-top: 30px;
  padding-bottom: 30px;
  padding-left: 30px;
  border-radius: 20px;
  width: 70vw;
  max-width: 1600px;
  height: auto;
  max-height: 1000px;
  text-align: left;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  position: relative;
}

#popupImage {
  width: 55%; 
  height: auto;
  border-radius: 20px;
  margin-right: 8%;
  position: relative;
}

#popupName {
  font-size: 3vh;
  font-weight: bold;
  margin-bottom: 10px;
}

#popupDescription {
  font-size: 2vh;
}


/* Navigation Buttons */
.nav-button {
  background-color: transparent;
  border: none;
  color: #fff;
  font-size: 2em;
  cursor: pointer;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}

#prevImage {
  left: 1.5%;
}

#nextImage {
  right: 1.5%;
}

解决方案 #

问题核心是当前箭头相对于.popup-content绝对定位，而非图片容器。要让箭头跟随图片同步缩放，需给图片添加容器，将箭头置于容器内，以容器作为定位参考。

修改后的HTML #

<div id="popup" class="popup hidden">
  <div class="popup-content">
    <span id="closePopup" class="close">&times;</span>
    <!-- 新增图片容器，用于定位箭头 -->
    <div class="image-container">
      <button id="prevImage" class="nav-button">&lt;&lt;/button>
      <img id="popupImage" src="" alt="Project Image">
      <button id="nextImage" class="nav-button">&gt;</button>
    </div>
    <div class="popup-text">
      <p id="popupName"></p>
      <p id="popupDescription"></p>
    </div>
  </div>
</div>

修改后的CSS #

/* Popup */
.popup {
  display: none;
  position: fixed;
  z-index: 1000;
  left: 0;
  top: 0;
  width: 100vw;
  height: 100vh;
  overflow: auto;
  background-color: rgba(0,0,0,0.5);
}

.popup-content {
  background-color: #494949;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  padding: 20px 30px;
  border-radius: 20px;
  width: 70vw;
  max-width: 1600px;
  height: auto;
  max-height: 1000px;
  text-align: left;
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  position: relative;
}

/* 图片容器：作为箭头的定位父级 */
.image-container {
  width: 55%;
  margin-right: 8%;
  position: relative;
}

#popupImage {
  width: 100%; 
  height: auto;
  border-radius: 20px;
}

#popupName {
  font-size: 3vh;
  font-weight: bold;
  margin-bottom: 10px;
}

#popupDescription {
  font-size: 2vh;
}

/* Navigation Buttons */
.nav-button {
  background-color: transparent;
  border: none;
  color: #fff;
  font-size: 2em;
  cursor: pointer;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1;
}

#prevImage {
  left: 10px; /* 相对于图片容器左侧的固定距离 */
}

#nextImage {
  right: 10px; /* 相对于图片容器右侧的固定距离 */
}

/* 关闭按钮定位补充 */
.close {
  position: absolute;
  top: 10px;
  right: 20px;
  font-size: 2em;
  color: #fff;
  cursor: pointer;
}

关键修改说明 #

1. 新增.image-container容器并设置position: relative，让箭头以该容器为定位基准
2. 将图片宽度改为容器的100%，保持响应式缩放
3. 调整箭头的left/right值为固定像素，确保缩放时箭头始终紧贴图片边缘
4. 补充关闭按钮的定位样式，避免弹窗布局错乱

内容的提问来源于stack exchange，提问作者Snefee