如何在滑块中的图像之间转换

时间:2018-04-27 15:53:21

标签: javascript css input range image-gallery

我有一个带输入范围的简单图像滑块。我想选择输入范围值,并能够淡入和淡出图像。

问题是 - 我的设置必须保持这种方式。我需要在li中使用img标签,并且需要在类名下将图像作为css背景URL。

如何根据滑块的位置识别当前播放和转换到下一个播放?

要求:如果用户在滑块上进入范围2,则应显示image2。如果用户进入范围4,则图像4应该是可见的,依此类推。

我已经能够读取输入范围并找到该图像类的图像。

如何删除上一个“活动”状态并插入此新图像?

请查找附件

let line = document.getElementById("line");

line.addEventListener("input", function(event){
  setNewImage(event.target.value);
});

function setNewImage(value){
  let currentImage = document.getElementsByClassName("playing");
  let newImageClassName = "image"+value;
}
.container {
  display: flex;
  justify-content: center;
  flex-direction: column;
  background-color: lavendar;
  width: 400px;
  height: 300px;
}

.image-container {
  width: 380px;
  height: 280px;
/*   background-color: pink; */
}

.scrollbar {
/*   padding: 0 5px 5px 0; */
}
.scrollbar input {
  width: 380px;
}

ul li {
  list-style: none;
}

.image {
  width: 380px;
  height: 260px;
  display: none;
}

.playing {
  display: block;
}
.image1 {
  background: url('http://placekitten.com/380/260') no-repeat;
}

.image2 {
  background: url('http://placekitten.com/378/260') no-repeat;
}

.image3 {
  background: url('http://placekitten.com/380/259') no-repeat;
}

.image4 {
  background: url('http://placekitten.com/379/260') no-repeat;
}

.image5 {
  background: url('http://placekitten.com/383/260') no-repeat;
}

.image6 {
  background: url('http://placekitten.com/380/261') no-repeat;
}
<div class="container">
  <div class="image-container">
    <ul>
      <li><img class="playing image image1" /></li>
      <li><img class="image image2" /></li>
      <li ><img class="image image3" /></li>
      <li><img class="image image4" /></img></li>
      <li><img class="image image5" /></li>
      <li><img class="image image6"/></li>
    </ul>
  </div>
  <div class="scrollbar">
    <input id="line" type="range" min=1 max =6 />
  </div>
</div>

我正在获取输入范围值。非常感谢来自这里的帮助!谢谢!

1 个答案:

答案 0 :(得分:1)

我能够解决它!

  

let line = document.getElementById("line");

line.addEventListener("input", function(event){
  setNewImage(event.target.value);
});

function setNewImage(value){
  // console.log(value);
  let currentImage = document.getElementsByClassName("playing");
  let removedImage = currentImage[0].classList.remove("playing");
  let imageToAdd = "image"+value;
  // console.log(imageToAdd);
  
  let getElToAdd = document.getElementsByClassName(imageToAdd);
  
  // console.log(getElToAdd);
  
  let newEl = getElToAdd[0];
  
 newEl.classList.add("playing");
}
.container {
  display: flex;
  justify-content: center;
  flex-direction: column;
  background-color: lavendar;
  width: 400px;
  height: 300px;
}

.image-container {
  width: 380px;
  height: 280px;
/*   background-color: pink; */
}

.scrollbar {
/*   padding: 0 5px 5px 0; */
}
.scrollbar input {
  width: 380px;
}

ul li {
  list-style: none;
}

.image {
  width: 380px;
  height: 260px;
  display: none;
}

.playing {
  display: block;
}
.image1 {
  background: url('http://placekitten.com/380/260') no-repeat;
}

.image2 {
  background: url('http://placekitten.com/378/260') no-repeat;
}

.image3 {
  background: url('http://placekitten.com/380/259') no-repeat;
}

.image4 {
  background: url('http://placekitten.com/379/260') no-repeat;
}

.image5 {
  background: url('http://placekitten.com/383/260') no-repeat;
}

.image6 {
  background: url('http://placekitten.com/380/261') no-repeat;
}
<div class="container">
  <div class="image-container">
    <ul>
      <li><img class="playing image image1" /></li>
      <li><img class="image image2" /></li>
      <li ><img class="image image3" /></li>
      <li><img class="image image4" /></img></li>
      <li><img class="image image5" /></li>
      <li><img class="image image6"/></li>
    </ul>
  </div>
  <div class="scrollbar">
    <input id="line" type="range" min=1 max =6 />
  </div>
</div>