在頁面頂部彈出模態圖像

Question

我發現此代碼可在點擊時彈出圖片，但我想將其用於多個圖片。 因此，我嘗試將element（myImg）從ID更改為Class，以便可以在頁面上使用較小的代碼，但是，一旦將ID更改為Class，代碼就會停止工作。 我把代碼的編輯版本不起作用了。 當它工作時，我單擊圖像會在頁面前面彈出。 當我單擊圖像時從ID更改為Class時，什么也沒有發生。

HTML：

<!DOCTYPE html>
<html>
  <head>
    <meta name="viewport" content="width=device-width, initial-scale=1">
  </head>

  <body>
    <img class="myImg" src="../../content/images/Photography/8bа.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>
  </body>

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: 1000px;
}

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

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

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

@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;
}

/* 100% Image Width on Smaller Screens */
@media only screen and (max-width: 700px){
  .modal-content {
    width: 100%;
  }
}

使用Javascript：

var modal = document.getElementById('myModal');

// Get the image and insert it inside the modal - use its "alt" text as a 
caption
var img = document.getElementsByClassName('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;
}

// Get the <span> element that closes the modal
var span = document.getElementsByClassName("close")[0];

// When the user clicks on <span> (x), close the modal
span.onclick = function() { 
  modal.style.display = "none";
}

Answer 1

document.getElementsByClassName('myImg'); 返回節點數組，因此您需要將click事件添加到數組中的第一個節點img[0] ：

編輯：添加了對處理多個圖像的支持

 var modal = document.getElementById('myModal'); // Get the image and insert it inside the modal - use its "alt" text as a caption var imgs = document.getElementsByClassName('myImg'); var modalImg = document.getElementById("img01"); var captionText = document.getElementById("caption"); for (var i = 0; i < imgs.length; i++) { imgs[i].addEventListener('click', e => { modal.style.display = "block"; modalImg.src = e.target.src; captionText.innerHTML = e.target.alt; }); } // Get the <span> element that closes the modal var span = document.getElementsByClassName("close")[0]; // When the user clicks on <span> (x), close the modal 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: 1000px; } #caption { margin: auto; display: block; width: 80%; max-width: 700px; text-align: center; color: #ccc; padding: 10px 0; height: 150px; } .modal-content, #caption { -webkit-animation-name: zoom; -webkit-animation-duration: 0.6s; animation-name: zoom; animation-duration: 0.6s; } @-webkit-keyframes zoom { from {-webkit-transform:scale(0)} to {-webkit-transform:scale(1)} } @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; } /* 100% Image Width on Smaller Screens */ @media only screen and (max-width: 700px){ .modal-content { width: 100%; } }

 <img class="myImg" src="../../content/images/Photography/8bа.jpg" alt="1) Trolltunga, Norway" width="300" height="200" /> <img class="myImg" src="../../content/images/Photography/8bа.jpg" alt="2) Trolltunga, Norway" width="300" height="200" /> <img class="myImg" src="../../content/images/Photography/8bа.jpg" alt="3) 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>

在頁面頂部彈出模態圖像

問題描述

1 個解決方案

解決方案1
1 已采納 2018-05-18 16:06:35

在頁面頂部彈出模態圖像

問題描述

1 個解決方案

解決方案1 1 已采納 2018-05-18 16:06:35

解決方案1
1 已采納 2018-05-18 16:06:35