页面上的几个模态图像 [英] Several Modal Images on page

问题描述

我是JS的新手，我正在尝试使用此代码在同一页面上使用2个模式图像:

I'm new with JS, I'm trying to use 2 modal images on same page with this code:

https://www.w3schools.com/howto/howto_css_modal_images.asp

使用此HTML，JS和CSS视图调整大小仅适用于一幅图像，不确定如何使它适用于同一页面上的两幅图像:

With this HTML, JS and CSS view resizing works only for one image, not sure how to make it work for two images on same page:

对于每个图像，我都有两次第一次的html代码:

I have first html code two times for each image:

HTML:

<img id="myImg" src="img_fjords.jpg" alt="Trolltunga, Norway" width="300" height="200">
<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content" id="img01">
  <div id="caption"></div>
</div> 

big-picture.css中的CSS:

CSS in big-picture.css:

#myImg {
    border-radius: 5px;
    cursor: pointer;
    transition: 0.3s;
}

#myImg:hover {opacity: 0.7;}

.modal {
    display: none; /* Hidden by default */
    position: fixed; /* Stay in place */
    z-index: 1; /* Sit on top */
    padding-top: 100px; /* Location of the box */
    left: 0;
    top: 0;
    width: 100%; /* Full width */
    height: 100%; /* Full height */
    overflow: auto; /* Enable scroll if needed */
    background-color: rgb(0,0,0); /* Fallback color */
    background-color: rgba(0,0,0,0.9); /* Black w/ opacity */
}

.modal-content {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
}

#caption {
    margin: auto;
    display: block;
    width: 80%;
    max-width: 700px;
    text-align: center;
    color: #ccc;
    padding: 10px 0;
    height: 150px;
}

.modal-content, #caption {
    animation-name: zoom;
    animation-duration: 0.6s;
}

@keyframes zoom {
    from {transform:scale(0)}
    to {transform:scale(1)}
}

.close {
    position: absolute;
    top: 15px;
    right: 35px;
    color: #f1f1f1;
    font-size: 40px;
    font-weight: bold;
    transition: 0.3s;
}

.close:hover,
.close:focus {
    color: #bbb;
    text-decoration: none;
    cursor: pointer;
}

@media only screen and (max-width: 700px){
    .modal-content {
        width: 100%;
    }
} 

和JS:

var modal = document.getElementById('myModal');
var img = document.getElementById('myImg');
var modalImg = document.getElementById("img01");
var captionText = document.getElementById("caption");
img.onclick = function(){
    modal.style.display = "block";
    modalImg.src = this.src;
    captionText.innerHTML = this.alt;
}

var span = document.getElementsByClassName("close")[0];

span.onclick = function() {
  modal.style.display = "none";
} 

推荐答案

您拥有的大多数代码都可以使用，但是您所引用的只是一个图像.通过使用document.getElementById()，您不允许添加第二张图像.我对您的代码进行了一些更改-HTML现在具有一些用于示例目的的图像，而JS现在使用document.getElementsByClassName()来允许多个图像.此外，我正在遍历图像列表，并将该事件处理程序附加到每个图像处理程序. 将其视为小提琴 ，或者在这里:

The code you have mostly works, but you're referencing specifically a single image. By using document.getElementById(), you haven't allowed for a second image. I've changed your code a little -- the HTML now has a few images for sample purposes and the JS now uses document.getElementsByClassName() to allow for multiple images. Further, I'm iterating over the list of images, and attaching that event handler to each one. See it as a fiddle, or here it is:

// create references to the modal...
var modal = document.getElementById('myModal');
// to all images -- note I'm using a class!
var images = document.getElementsByClassName('myImages');
// the image in the modal
var modalImg = document.getElementById("img01");
// and the caption in the modal
var captionText = document.getElementById("caption");

// Go through all of the images with our custom class
for (var i = 0; i < images.length; i++) {
  var img = images[i];
  // and attach our click listener for this image.
  img.onclick = function(evt) {
    modal.style.display = "block";
    modalImg.src = this.src;
    captionText.innerHTML = this.alt;
  }
}

var span = document.getElementsByClassName("close")[0];

span.onclick = function() {
  modal.style.display = "none";
}

#myImg {
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
}

#myImg:hover {
  opacity: 0.7;
}

.modal {
  display: none;
  /* Hidden by default */
  position: fixed;
  /* Stay in place */
  z-index: 1;
  /* Sit on top */
  padding-top: 100px;
  /* Location of the box */
  left: 0;
  top: 0;
  width: 100%;
  /* Full width */
  height: 100%;
  /* Full height */
  overflow: auto;
  /* Enable scroll if needed */
  background-color: rgb(0, 0, 0);
  /* Fallback color */
  background-color: rgba(0, 0, 0, 0.9);
  /* Black w/ opacity */
}

.modal-content {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
}

#caption {
  margin: auto;
  display: block;
  width: 80%;
  max-width: 700px;
  text-align: center;
  color: #ccc;
  padding: 10px 0;
  height: 150px;
}

.modal-content,
#caption {
  animation-name: zoom;
  animation-duration: 0.6s;
}

@keyframes zoom {
  from {
    transform: scale(0)
  }
  to {
    transform: scale(1)
  }
}

.close {
  position: absolute;
  top: 15px;
  right: 35px;
  color: #f1f1f1;
  font-size: 40px;
  font-weight: bold;
  transition: 0.3s;
}

.close:hover,
.close:focus {
  color: #bbb;
  text-decoration: none;
  cursor: pointer;
}

@media only screen and (max-width: 700px) {
  .modal-content {
    width: 100%;
  }
}

<img class="myImages" id="myImg" src="http://onebigphoto.com/uploads/2012/10/midnight-sun-in-lofoten-norway.jpg" alt="Midnight sun in Lofoten, Norway" width="300" height="200">
<img class="myImages" id="myImg" src="http://cdn-image.travelandleisure.com/sites/default/files/styles/1600x1000/public/1490029386/fisherman-cabin-hamnoy-lofoten-islands-norway-NORWAY0320.jpg?itok=cpPuUjh1" alt="Fishermen's cabins in Lofoten, Norway"
width="300" height="200">
<img class="myImages" id="myImg" src="http://fjordtours.blob.core.windows.net/fjordtours-umbraco/1199/gerirangerfjord-per-ottar-walderhaug-fjordnorway.jpg" alt="Gerirangerfjord, Norway" width="300" height="200">
<div id="myModal" class="modal">
  <span class="close">&times;</span>
  <img class="modal-content" id="img01">
  <div id="caption"></div>
</div>

这篇关于页面上的几个模态图像的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！