Question

您好，我从w3学校获得的代码仅适用于一个图像，但是我的网页上有多个图像，如何使用带for循环的数组？请帮助我被困了几个小时。我有一个主意，但这涉及多个功能，我会使用switch语句获取图像ID吗？ https://www.w3schools.com/howto/howto_css_modal_images.asp

这是小提琴：https://jsfiddle.net/sfL71epx/ 点击第二张图片由于我编辑时会显示某些原因，html被隐藏了。让我知道你是否知道为什么。

node_modules

// 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";
}

Answer 1

问题是，实际上打开模式的click事件侦听器仅附加到单个图像-来自w3schools示例的图像。您需要将其附加到每个图像。幸运的是，事情并不难。您所有的图片都具有相同的 img-fluid img-thumbnail 类。使用名为 getElementsByClassName（）的便捷Javascript函数，我们可以获取您站点上所有共享该特定类的图像的数组。完成之后，您只需要遍历返回的数组，并将点击侦听器附加到每个数组。

var images = document.getElementsByClassName("img-fluid img-thumbnail");
for (var a = 0; a < images.length; a++) {
  images[a].onclick = function() {
    modal.style.display = "block";
    modalImg.src = this.src;
    captionText.innerHTML = this.alt;
  }
}

这是现场演示：

// 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;
}
var images = document.getElementsByClassName("img-fluid img-thumbnail");
for (var a = 0; a < images.length; a++) {
  images[a].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";
}

/*!
 * Start Bootstrap - Clean Blog v5.0.5 (https://startbootstrap.com/template-overviews/clean-blog)
 * Copyright 2013-2019 Start Bootstrap
 * Licensed under MIT (https://github.com/BlackrockDigital/startbootstrap-clean-blog/blob/master/LICENSE)
 */

body {
  font-size: 20px;
  color: #212529;
  font-family: Lora, 'Times New Roman', serif
}

p {
  line-height: 1.5;
  margin: 30px 0
}

p a {
  text-decoration: underline
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 800;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif
}

a {
  color: #212529;
  -webkit-transition: all .2s;
  transition: all .2s
}

a:focus,
a:hover {
  color: #0085a1
}

blockquote {
  font-style: italic;
  color: #868e96
}

.section-heading {
  font-size: 36px;
  font-weight: 700;
  margin-top: 60px
}

.caption {
  font-size: 14px;
  font-style: italic;
  display: block;
  margin: 0;
  padding: 10px;
  text-align: center;
  border-bottom-right-radius: 5px;
  border-bottom-left-radius: 5px
}

::selection {
  color: #fff;
  background: #0085a1;
  text-shadow: none
}

img::selection {
  color: #fff;
  background: 0 0
}

img::-moz-selection {
  color: #fff;
  background: 0 0
}

#mainNav {
  position: absolute;
  border-bottom: 1px solid #e9ecef;
  background-color: #fff;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif
}

#mainNav .navbar-brand {
  font-weight: 800;
  color: #343a40
}

#mainNav .navbar-toggler {
  font-size: 12px;
  font-weight: 800;
  padding: 13px;
  text-transform: uppercase;
  color: #343a40
}

#mainNav .navbar-nav>li.nav-item>a {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 1px;
  text-transform: uppercase
}

@media only screen and (min-width:992px) {
  #mainNav {
    border-bottom: 1px solid transparent;
    background: 0 0
  }
  #mainNav .navbar-brand {
    padding: 10px 20px;
    color: #fff
  }
  #mainNav .navbar-brand:focus,
  #mainNav .navbar-brand:hover {
    color: rgba(255, 255, 255, .8)
  }
  #mainNav .navbar-nav>li.nav-item>a {
    padding: 10px 20px;
    color: #fff
  }
  #mainNav .navbar-nav>li.nav-item>a:focus,
  #mainNav .navbar-nav>li.nav-item>a:hover {
    color: rgba(255, 255, 255, .8)
  }
}

@media only screen and (min-width:992px) {
  #mainNav {
    -webkit-transition: background-color .2s;
    transition: background-color .2s;
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
    -webkit-backface-visibility: hidden
  }
  #mainNav.is-fixed {
    position: fixed;
    top: -67px;
    -webkit-transition: -webkit-transform .2s;
    transition: -webkit-transform .2s;
    transition: transform .2s;
    transition: transform .2s, -webkit-transform .2s;
    border-bottom: 1px solid #fff;
    background-color: rgba(255, 255, 255, .9)
  }
  #mainNav.is-fixed .navbar-brand {
    color: #212529
  }
  #mainNav.is-fixed .navbar-brand:focus,
  #mainNav.is-fixed .navbar-brand:hover {
    color: #0085a1
  }
  #mainNav.is-fixed .navbar-nav>li.nav-item>a {
    color: #212529
  }
  #mainNav.is-fixed .navbar-nav>li.nav-item>a:focus,
  #mainNav.is-fixed .navbar-nav>li.nav-item>a:hover {
    color: #0085a1
  }
  #mainNav.is-visible {
    -webkit-transform: translate3d(0, 100%, 0);
    transform: translate3d(0, 100%, 0)
  }
}

header.masthead {
  margin-bottom: 50px;
  background: no-repeat center center;
  background-color: #868e96;
  background-attachment: scroll;
  position: relative;
  background-size: cover
}

header.masthead .overlay {
  position: absolute;
  top: 0;
  left: 0;
  height: 100%;
  width: 100%;
  background-color: #ca5981;
  opacity: .5;
}

header.masthead .page-heading,
header.masthead .post-heading,
header.masthead .site-heading {
  padding: 200px 0 150px;
  color: #fff
}

@media only screen and (min-width:768px) {
  header.masthead .page-heading,
  header.masthead .post-heading,
  header.masthead .site-heading {
    padding: 200px 0
  }
}

header.masthead .page-heading,
header.masthead .site-heading {
  text-align: center
}

header.masthead .page-heading h1,
header.masthead .site-heading h1 {
  font-size: 50px;
  margin-top: 0
}

header.masthead .page-heading .subheading,
header.masthead .site-heading .subheading {
  font-size: 40px;
  font-weight: 400;
  line-height: 1.1;
  display: block;
  margin: 10px 0 0;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

@media only screen and (min-width:768px) {
  header.masthead .page-heading h1,
  header.masthead .site-heading h1 {
    font-size: 80px
  }
}

header.masthead .post-heading h1 {
  font-size: 35px
}

header.masthead .post-heading .meta,
header.masthead .post-heading .subheading {
  line-height: 1.1;
  display: block
}

header.masthead .post-heading .subheading {
  font-size: 24px;
  font-weight: 600;
  margin: 10px 0 30px;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif
}

header.masthead .post-heading .meta {
  font-size: 20px;
  font-weight: 300;
  font-style: italic;
  font-family: Lora, 'Times New Roman', serif
}

header.masthead .post-heading .meta a {
  color: #fff
}

@media only screen and (min-width:768px) {
  header.masthead .post-heading h1 {
    font-size: 55px
  }
  header.masthead .post-heading .subheading {
    font-size: 30px
  }
}

.post-preview>a {
  color: #212529
}

.post-preview>a:focus,
.post-preview>a:hover {
  text-decoration: none;
  color: #0085a1
}

.post-preview>a>.post-title {
  font-size: 30px;
  margin-top: 30px;
  margin-bottom: 10px
}

.post-preview>a>.post-subtitle {
  font-weight: 300;
  margin: 0 0 10px
}

.post-preview>.post-meta {
  font-size: 18px;
  font-style: italic;
  margin-top: 0;
  color: #868e96
}

.post-preview>.post-meta>a {
  text-decoration: none;
  color: #212529
}

.post-preview>.post-meta>a:focus,
.post-preview>.post-meta>a:hover {
  text-decoration: underline;
  color: #0085a1
}

@media only screen and (min-width:768px) {
  .post-preview>a>.post-title {
    font-size: 36px
  }
}

.floating-label-form-group {
  font-size: 14px;
  position: relative;
  margin-bottom: 0;
  padding-bottom: .5em;
  border-bottom: 1px solid #dee2e6
}

.floating-label-form-group input,
.floating-label-form-group textarea {
  font-size: 1.5em;
  position: relative;
  z-index: 1;
  padding: 0;
  resize: none;
  border: none;
  border-radius: 0;
  background: 0 0;
  -webkit-box-shadow: none !important;
  box-shadow: none !important;
  font-family: Lora, 'Times New Roman', serif
}

.floating-label-form-group input::-webkit-input-placeholder,
.floating-label-form-group textarea::-webkit-input-placeholder {
  color: #868e96;
  font-family: Lora, 'Times New Roman', serif
}

.floating-label-form-group label {
  font-size: .85em;
  line-height: 1.764705882em;
  position: relative;
  z-index: 0;
  top: 2em;
  display: block;
  margin: 0;
  -webkit-transition: top .3s ease, opacity .3s ease;
  transition: top .3s ease, opacity .3s ease;
  vertical-align: middle;
  vertical-align: baseline;
  opacity: 0
}

.floating-label-form-group .help-block {
  margin: 15px 0
}

.floating-label-form-group-with-value label {
  top: 0;
  opacity: 1
}

.floating-label-form-group-with-focus label {
  color: #0085a1
}

form .form-group:first-child .floating-label-form-group {
  border-top: 1px solid #dee2e6
}

footer {
  padding: 50px 0 65px
}

footer .list-inline {
  margin: 0;
  padding: 0
}

footer .copyright {
  font-size: 14px;
  margin-bottom: 0;
  text-align: center
}

.btn {
  font-size: 14px;
  font-weight: 800;
  padding: 15px 25px;
  letter-spacing: 1px;
  text-transform: uppercase;
  border-radius: 0;
  font-family: 'Open Sans', 'Helvetica Neue', Helvetica, Arial, sans-serif
}

.btn-primary {
  background-color: #0085a1;
  border-color: #0085a1
}

.btn-primary:active,
.btn-primary:focus,
.btn-primary:hover {
  color: #fff;
  background-color: #00657b !important;
  border-color: #00657b !important
}

.btn-lg {
  font-size: 16px;
  padding: 25px 35px
}

body>div:nth-child(3)>ul {
  float: right;
  margin: auto;
  padding: 10px;
  display: flexbox;
  list-style-type: none;
}

body>div:nth-child(3)>ul>li {
  border: 2px solid #e485a5;
  border-radius: 20px;
  text-align: center;
  margin-bottom: 20px
}

body>div:nth-child(3)>ul>li:hover {
  border: 2px solid aqua;
  background-color: #e485a5;
  border-radius: 20px;
  text-align: center;
  -webkit-animation: flip 3s linear 0s infinite normal;
  animation: flip 3s linear 0s infinite normal;
}

body>div:nth-child(3)>ul>li:nth-child(3),
body>div:nth-child(3)>ul>li:nth-child(4) {
  border: 2px solid #e485a5;
  padding-left: 5px;
  padding-right: 5px;
}

body>div:nth-child(3)>ul>li:nth-child(3):hover,
body>div:nth-child(3)>ul>li:nth-child(4):hover {
  border: 2px solid #e485a5;
  padding-left: 5px;
  padding-right: 5px;
  border: 2px solid aqua;
  background-color: #e485a5;
}

@-webkit-keyframes flip {
  0% {
    -webkit-transform: translateY(0);
    transform: rotateY(0deg);
  }
  50% {
    -webkit-transform: translateY(180);
    transform: rotateY(180deg);
  }
  100% {
    -webkit-transform: translateY(0);
    transform: rotateY(0deg);
  }
}

@keyframes flip {
  0% {
    transform: rotateY(0deg);
  }
  50% {
    transform: rotateY(180deg);
  }
  100% {
    transform: rotateY(0deg);
  }
}

#myImg {
  border-radius: 5px;
  cursor: pointer;
  transition: 0.3s;
}

#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)
  }
  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%;
  }
}

<div class="container">



  <div class="row text-center text-lg-left">

    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="http://powermovesandpumps.com/wp-content/uploads/2018/09/Walking-through-Kuta-Bali-2-300x400.jpg" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail " id="myImg" src="http://powermovesandpumps.com/wp-content/uploads/2018/09/IMG_4082-768x512.jpg" alt="">
                </a>
    </div>
    <div id="myModal" class="modal">
      <span class="close">&times;</span>
      <img class="modal-content" id="img01">
      <div id="caption"></div>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/EUfxH-pze7s/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/M185_qYH8vg/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/sesveuG_rNo/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/AvhMzHwiE_0/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/2gYsZUmockw/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/EMSDtjVHdQ8/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/8mUEy0ABdNE/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/G9Rfc1qccH4/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/aJeH0KcFkuc/400x300" alt="">
                </a>
    </div>
    <div class="col-lg-3 col-md-4 col-6">
      <a href="#" class="d-block mb-4 h-100">
                  <img class="img-fluid img-thumbnail" src="https://source.unsplash.com/p2TQ-3Bh3Oo/400x300" alt="">
                </a>
    </div>
  </div>

</div>

我的模式的关闭按钮不起作用

1 个答案: