如何在滑块中的图像之间转换 [英] how to transition between images in a slider

问题描述

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。

I have a simple image slider with input range. I want to pick input range value and be able to fade-in and fade out images.

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

The problem is - my setup has to remain this way. I need to have img tags within li and need to have images as css background url under classnames.

我如何识别当前播放并转换到下一个取决于哪里滑块是？

How do i identify the current playing and transition to the next depending on where the slider is?

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image4应该是可见的，依此类推。

Requirement: If user goes to range 2 on slider, image2 should be visible. if user goes to range 4, image4 should be visible and so on.

我已经能够读取输入范围并找到该图像类的图像。

I have been able to read the input range and locate the image with that image class.

如何删除上一个活动状态并插入此新图像？

How do I remove the "active" state of previous one and insert this new image?

请查找附加代码

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>

我得到了输入范围值。非常感谢来自这里的帮助！谢谢！

I am getting the input range value. Help from here is greatly appreciated! Thanks!

推荐答案

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>

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