我正在使用一个库来比较不同的照片，就像“之前和之后”之类的东西，它们显示在另一张的上面，中间有一个按钮，您可以向左或向右拖动以查看照片差异。现在，我想做的是实现两个按钮 - 一个在图片的左侧，一个在右侧。当您单击这些按钮时，我希望照片与前两张或后两张发生变化。我为按钮做了一个 if 语句，但它们无法正常工作，尽管我没有注意到任何明显的错误。HTML代码<div id="wrapper"> <div class="arrowsContainer"> <div id="leftArrow"> <p>Left</p> </div> </div> <div class="cd-image-container"> <img src="" id="originalImage" alt="Original Image"> <div class="cd-resize-img"> <img src="" id="modifiedImage" alt="Modified Image"> </div> <span class="cd-handle"></span> </div> <div class="arrowsContainer"> <div id="rightArrow"> <p>Right</p> </div> </div> </div>JavaScript 代码let originalImage = document.querySelector('#originalImage');let modifiedImage = document.querySelector('#modifiedImage');document.querySelector('#leftArrow').addEventListener("click", function(){ if ((modifiedImage.src = "img/3.jpg") && (originalImage.src = "img/4.jpg")){ modifiedImage.src = "img/1.jpg"; originalImage.src = "img/2.jpg"; }});document.querySelector('#rightArrow').addEventListener('click', function(){ if ((modifiedImage.src = "img/1.jpg") && (originalImage.src = "img/2.jpg")){ modifiedImage.src = "img/3.jpg"; originalImage.src = "img/4.jpg"; } if ((modifiedImage.src = "img/3.jpg") && (originalImage.src = "img/4.jpg")){ modifiedImage.src = "img/5.jpg"; originalImage.src = "img/6.jpg"; } if ((modifiedImage.src = "img/5.jpg") && (originalImage.src = "img/6.jpg")){ modifiedImage.src = "img/7.jpg"; originalImage.src = "img/8.jpg"; }});现在，如果我打开页面，就会显示照片 1 和 2。如果我点击“右”按钮，它将显示图片 7 和 8，从那里，如果我点击“左”按钮，它将再次显示图片 1 和 2，尽管我在“左”上的条件按钮甚至不包括您在图 7 和 8 中的场景。请帮忙，我真的不明白发生了什么
2 回答
素胚勾勒不出你
TA贡献1827条经验 获得超9个赞
我认为您想要实现的是，当您单击按钮时right您想要显示接下来的两个图像，当您单击按钮时prev您想要显示前两个图像。如果是这种情况，那么您可以检查我的解决方案。
这是js文件。
let originalImage = document.querySelector("#originalImage");
let modifiedImage = document.querySelector("#modifiedImage");
const totalImages = 8;
let currentCount = 0;
document.querySelector("#leftArrow").addEventListener("click", function() {
currentCount = (currentCount - 2 + totalImages) % totalImages;
originalImage.src = `./img/${currentCount + 1}.jpg`;
modifiedImage.src = `./img/${currentCount + 2}.jpg`;
});
document.querySelector("#rightArrow").addEventListener("click", function() {
currentCount = (currentCount + 2) % totalImages;
originalImage.src = `./img/${currentCount + 1}.jpg`;
modifiedImage.src = `./img/${currentCount + 2}.jpg`;
});
这是.html文件
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<!-- <div class="container">Item</div> -->
<div id="wrapper">
<div class="arrowsContainer">
<div id="leftArrow">
<p>Left</p>
</div>
</div>
<div class="cd-image-container">
<img src="./img/1.jpg" id="originalImage" alt="Original Image" />
<div class="cd-resize-img">
<img src="./img/2.jpg" id="modifiedImage" alt="Modified Image" />
</div>
<span class="cd-handle"></span>
</div>
<div class="arrowsContainer">
<div id="rightArrow">
<p>Right</p>
</div>
</div>
</div>
<script src="main.js"></script>
</body>
</html>
let originalImage = document.querySelector("#originalImage");
let modifiedImage = document.querySelector("#modifiedImage");
const totalImages = 8;
let currentCount = 0;
document.querySelector("#leftArrow").addEventListener("click", function() {
currentCount = (currentCount - 2 + totalImages) % totalImages;
originalImage.src = `https://i.picsum.photos/id/${currentCount + 1}/200/300.jpg`;
modifiedImage.src = `https://i.picsum.photos/id/${currentCount + 2}/200/300.jpg`;
});
document.querySelector("#rightArrow").addEventListener("click", function() {
currentCount = (currentCount + 2) % totalImages;
originalImage.src = `https://i.picsum.photos/id/${currentCount + 1}/200/300.jpg`;
modifiedImage.src = `https://i.picsum.photos/id/${currentCount + 2}/200/300.jpg`;
});
#wrapper {
display: flex;
}
.cd-image-container {
display: flex;
}
#leftArrow,
#rightArrow {
cursor: pointer;
}
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<meta http-equiv="X-UA-Compatible" content="ie=edge" />
<title>Document</title>
<link rel="stylesheet" href="style.css" />
</head>
<body>
<!-- <div class="container">Item</div> -->
<div id="wrapper">
<div class="arrowsContainer">
<div id="leftArrow">
<p>Left</p>
</div>
</div>
<div class="cd-image-container">
<img src="https://i.picsum.photos/id/1/200/300.jpg" id="originalImage" alt="Original Image" />
<div class="cd-resize-img">
<img src="https://i.picsum.photos/id/2/200/300.jpg" id="modifiedImage" alt="Modified Image" />
</div>
<span class="cd-handle"></span>
</div>
<div class="arrowsContainer">
<div id="rightArrow">
<p>Right</p>
</div>
</div>
</div>
<script src="main.js"></script>
</body>
</html>
杨__羊羊
TA贡献1943条经验 获得超7个赞
在 if 语句中使用 == 或 ===
试一试
if ((modifiedImage.src == "img/1.jpg") && (originalImage.src == "img/2.jpg")){
modifiedImage.src = "img/3.jpg";
originalImage.src = "img/4.jpg";here- 2 回答
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