Html/CSS/Javascript：弹出式 onclick 第二次无效 div

Question

我在选择 div 时打开一个小弹出框。它有效，但如果我第二次尝试这样做（如下所示），它就不起作用。

感谢您提供的任何帮助，我们将不胜感激。这是我的代码 w3schools:

HTML:

<div class="popup" onclick="myFunction()">
  Click me!
  <span class="popuptext" id="myPopup">Popup text...</span>
</div>

<div class="popup" onclick="myFunction2()">
  Click me2!
  <span class="popuptext" id="myPopup2">Popup text...2</span>
</div>

JavaScript:

function myFunction() {
  var popup =
    document.getElementById("myPopup");
  popup.classList.toggle("show");
}

function myFunction2() {
  var popup =
    document.getElementById("myPopup2");
  popup.classList.toggle("show");
}

CSS:

/* Popup container */
.popup {
  position: relative;
  display: inline-block;
  cursor: pointer;
}

/* The actual popup (appears on top) */
.popup .popuptext {
  visibility: hidden;
  width: 160px;
  background-color: #555;
  color: #fff;
  text-align: center;
  border-radius: 6px;
  padding: 8px 0;
  position: absolute;
  z-index: 1;
  bottom: 125%;
  left: 50%;
  margin-left: -80px;
}

/* Popup arrow */
.popup .popuptext::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  margin-left: -5px;
  border-width: 5px;
  border-style: solid;
  border-color: #555 transparent transparent transparent;
}

/* Toggle this class when clicking on the popup 
     container (hide and show the popup) */
.popup .show {
  visibility: visible;
  -webkit-animation: fadeIn 1s;
  animation: fadeIn 1s
}

Answer 1

myFunction 声明了两次，第二次覆盖了第一次。

将其更改为 myFunction2 或他们更新您的任何内容 onclick="myFunction2()"

检查您的控制台是否有错误总是好的:)

 function myFunction() {
   var popup = 
   document.getElementById("myPopup");
   popup.classList.toggle("show");
  }
   function myFunction2() {
   var popup = 
   document.getElementById("myPopup2");
   popup.classList.toggle("show");
  }

body {
    padding-top: 80px;
    text-align: center;
}
/* Popup container */
 .popup {
 position: relative;
 display: inline-block;
 cursor: pointer;
 }

 /* The actual popup (appears on top) */
 .popup .popuptext {
 visibility: hidden;
 width: 160px;
 background-color: #555;
 color: #fff;
 text-align: center;
 border-radius: 6px;
 padding: 8px 0;
 position: absolute;
 z-index: 1;
 bottom: 125%;
 left: 50%;
 margin-left: -80px;
 }

 /* Popup arrow */
 .popup .popuptext::after {
 content: "";
 position: absolute;
 top: 100%;
 left: 50%;
 margin-left: -5px;
 border-width: 5px;
 border-style: solid;
 border-color: #555 transparent transparent 
 transparent;
 }

 /* Toggle this class when clicking on the popup 
 container (hide and show the popup) */
 .popup .show {
 visibility: visible;
 -webkit-animation: fadeIn 1s;
 animation: fadeIn 1s
 }

<div class="popup" onclick="myFunction()">Click 
me!
  <span class="popuptext" id="myPopup">Popup 
   text...</span>
</div>

<div class="popup" onclick="myFunction2()">Click 
me2!
  <span class="popuptext" id="myPopup2">Popup 
   text...2</span>
 </div>

Answer 2

您的代码似乎工作正常。

/* Popup container */
 .popup {
 position: relative;
 display: inline-block;
 cursor: pointer;
 }

 /* The actual popup (appears on top) */
 .popup .popuptext {
 visibility: hidden;
 width: 160px;
 background-color: #555;
 color: #fff;
 text-align: center;
 border-radius: 6px;
 padding: 8px 0;
 position: absolute;
 z-index: 1;
 bottom: 125%;
 left: 50%;
 margin-left: -80px;
 }

 /* Popup arrow */
 .popup .popuptext::after {
 content: "";
 position: absolute;
 top: 100%;
 left: 50%;
 margin-left: -5px;
 border-width: 5px;
 border-style: solid;
 border-color: #555 transparent transparent 
 transparent;
 }

 /* Toggle this class when clicking on the popup 
 container (hide and show the popup) */
 .popup .show {
 visibility: visible;
 -webkit-animation: fadeIn 1s;
 animation: fadeIn 1s
 }

<div class="popup" onclick="myFunction()">Click 
me!
  <span class="popuptext" id="myPopup">Popup 
   text...</span>
</div>

<div class="popup" onclick="myFunction2()">Click 
me2!
  <span class="popuptext" id="myPopup2">Popup 
   text...2</span>
 </div>
 <script>
   function myFunction() {
   var popup = 
   document.getElementById("myPopup");
   popup.classList.toggle("show");
  }
   function myFunction2() {
   var popup = 
   document.getElementById("myPopup2");
   popup.classList.toggle("show");
  }
  </script>

Answer 3

仅使用javascript添加点击事件即可。使用它，您可以添加尽可能多的弹出元素。

  var popupArr = document.getElementsByClassName("popup");
  for (var index in popupArr) {
      popupArr[index].onclick = function(ev) {
          var popup = ev.target.children[0];
          popup.classList.toggle("show");
      }
  }

/* Popup container */
 .popup {
 position: relative;
 display: inline-block;
 cursor: pointer;
 }

 /* The actual popup (appears on top) */
 .popup .popuptext {
 visibility: hidden;
 width: 160px;
 background-color: #555;
 color: #fff;
 text-align: center;
 border-radius: 6px;
 padding: 8px 0;
 position: absolute;
 z-index: 1;
 bottom: 125%;
 left: 50%;
 margin-left: -80px;
 }

 /* Popup arrow */
 .popup .popuptext::after {
 content: "";
 position: absolute;
 top: 100%;
 left: 50%;
 margin-left: -5px;
 border-width: 5px;
 border-style: solid;
 border-color: #555 transparent transparent 
 transparent;
 }

 /* Toggle this class when clicking on the popup 
 container (hide and show the popup) */
 .popup .show {
 visibility: visible;
 -webkit-animation: fadeIn 1s;
 animation: fadeIn 1s
 }

<div class="popup">Click 
me!
  <span class="popuptext" >Popup 
   text...</span>
</div>

<div class="popup">Click 
me2!
  <span class="popuptext" >Popup 
   text...2</span>
 </div>

Html/CSS/Javascript：弹出式 onclick 第二次无效 div

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