如何使用JavaScript放大多张图片

Question

click picture outcome that I want with multiple pictures though 单击我想要多张图片的图片结果

I've been tasked with fixing this problem out and I just can't grasp it. 我的任务是解决此问题，但我实在无法把握。 I want to enlarge multiple pictures using JavaScript. 我想使用JavaScript放大多张图片。 I can get one picture to enlarge but when I try for other images I get no response. 我可以放大一张图片，但是当我尝试其他图片时却没有任何反应。

I tried making img id a class and I tried to make multiple different id's but nothing I do works so here I am. 我尝试将img id设置为一个类，并尝试创建多个不同的id，但是我什么都没做，所以我在这里。

I'm using code from W3school 我正在使用W3school的代码

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

 img id="myImg" #myImg:hover {opacity: 0.7;} /* The Modal (background) */ .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 (image) */ .modal-content { margin: auto; display: block; width: 80%; max-width: 700px; } /* Caption of Modal Image */ #caption { margin: auto; display: block; width: 80%; max-width: 700px; text-align: center; color: #ccc; padding: 10px 0; height: 150px; } /* Add Animation */ .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(0.1)} to {transform: scale(1)} } /* The Close Button */ .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%; } }

 <html> <head> </head> <body> <h2>Image Modal</h2> <p>In this example, we use CSS to create a modal (dialog box) that is hidden by default.</p> <p>We use JavaScript to trigger the modal and to display the current image inside the modal when it is clicked on. Also note that we use the value from the image's "alt" attribute as an image caption text inside the modal.</p> <p>Don't worry if you do not understand the code right away. When you are done with CSS, go to our JavaScript Tutorial to learn more.</p> <img id="myImg" src="http://orig03.deviantart.net/558e/f/2013/324/2/7/cute_anime_cat_girl_by_ssyomako-d6uyf48.jpg" alt="Pink hair kitty cat ^-^" width="300" height="200"> <!-- The Modal --> <div id="myModal" class="modal"> <span class="close">×</span> <img class="modal-content" id="img01"> <div id="caption"></div> </div> </body> </html>

Answer 1

You can make use of onclick event on image click. 您可以在图片点击时使用onclick事件。 So i have added a onclick= somefunct(this) on each images. 所以我在每个图像上添加了onclick = somefunct（this）。

Also make sure you include your script just above the closing body tag 另外，请确保将脚本放在结束body标签的正上方

ie 即

</body>

Now you can observe that the el that is passed as argument in somefunct is the element itself. 现在您可以观察到在somefunct中作为参数传递的el是元素本身。

SO i have also modified your 所以我也修改了你

var img = document.getElementById('myImg')

to 至

var img = el;

Also modified: 还修改了：

    modalImg.src = this.src;
    captionText.innerHTML = this.alt;

to 至

     modalImg.src = el.src;
     captionText.innerHTML = el.alt;

Here is the complete working one: 这是完整的工作清单：

    </head>
    <body>

    <h2>Image Modal</h2>
    <p>In this example, we use CSS to create a modal (dialog box) that is hidden by default.</p>
    <p>We use JavaScript to trigger the modal and to display the current image inside the modal when it is clicked on. Also note that we use the value from the image's "alt" attribute as an image caption text inside the modal.</p>
    <p>Don't worry if you do not understand the code right away. When you are done with CSS, go to our JavaScript Tutorial to learn more.</p>

    <img id="myImg" src="http://orig03.deviantart.net/558e/f/2013/324/2/7/cute_anime_cat_girl_by_ssyomako-d6uyf48.jpg" alt="Pink hair kitty cat ^-^" width="300" height="200" onclick="somefunct(this)">

    <img id="myImg2" src="https://pbs.twimg.com/profile_images/875749462957670400/T0lwiBK8_400x400.jpg" width="300" height="200"  onclick=somefunct(this)>

    <!-- The Modal -->
    <div id="myModal" class="modal">
      <span class="close">×</span>
      <img class="modal-content" id="img01">
      <div id="caption"></div>
    </div>

    <script>
    // Get the modal
    function somefunct (el) {
            var modal = document.getElementById('myModal');

    // Get the image and insert it inside the modal - use its "alt" text as a caption
        console.log(el);
    var img = el;
    var modalImg = document.getElementById("img01");
    var captionText = document.getElementById("caption");
    modal.style.display = "block";
      modalImg.src = el.src;
      captionText.innerHTML = el.alt;
    /* img.onclick = function(){

    }
     */
    // 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";
    }
}
    </script>

    </body>
 </html>

Answer 2

Here is a working solution using onclick. 这是使用onclick的可行解决方案。 you have to pass image id dynamically in to script. 您必须将图片ID动态传递到脚本中。 Hope this will help your study. 希望这对您的学习有所帮助。

  function openModal(id) { // Get the modal var modal = document.getElementById('myModal'); // Get the image and insert it inside the modal - use its "alt" text as a caption var img = document.getElementById(id); var modalImg = document.getElementById("img01"); var captionText = document.getElementById("caption"); modal.style.display = "block"; modalImg.src = img.src; captionText.innerHTML = img.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"; } }

  img:hover {opacity: 0.7;} /* The Modal (background) */ .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 (image) */ .modal-content { margin: auto; display: block; width: 80%; max-width: 700px; } /* Caption of Modal Image */ #caption { margin: auto; display: block; width: 80%; max-width: 700px; text-align: center; color: #ccc; padding: 10px 0; height: 150px; } /* Add Animation */ .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(0.1)} to {transform: scale(1)} } /* The Close Button */ .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%; } }

 <html> <head> </head> <body> <h2>Image Modal</h2> <p>In this example, we use CSS to create a modal (dialog box) that is hidden by default.</p> <p>We use JavaScript to trigger the modal and to display the current image inside the modal when it is clicked on. Also note that we use the value from the image's "alt" attribute as an image caption text inside the modal.</p> <p>Don't worry if you do not understand the code right away. When you are done with CSS, go to our JavaScript Tutorial to learn more.</p> <img id="myImg1" src="https://www.gstatic.com/webp/gallery/1.sm.jpg" alt="Pink hair kitty cat ^-^" width="300" height="200" onclick="openModal(this.id)"> <img id="myImg2" src="https://www.gstatic.com/webp/gallery/2.jpg" alt="Black hair kitty cat ^-^" width="300" height="200" onclick="openModal(this.id)"> <!-- The Modal --> <div id="myModal" class="modal"> <span class="close">×</span> <img class="modal-content" id="img01"> <div id="caption"></div> </div> </body> </html>

如何使用JavaScript放大多张图片

问题描述

2 个解决方案

解决方案1
0 2018-12-31 05:37:15

解决方案2
0 已采纳 2018-12-31 05:55:21

如何使用JavaScript放大多张图片

问题描述

2 个解决方案

解决方案1 0 2018-12-31 05:37:15

解决方案2 0 已采纳 2018-12-31 05:55:21

解决方案1
0 2018-12-31 05:37:15

解决方案2
0 已采纳 2018-12-31 05:55:21