如何在点击的确切卡片上弹出消息？

Question

我试图在卡片列表中显示一些元素，当我单击卡片时，我需要在该卡片上显示弹出消息。 现在它显示在最上面的卡片。 但我需要它显示在我点击的卡片上。

这是我用于显示卡片元素和弹出窗口的 html 代码：

<a class="external" ng-repeat="card in cardData" ng-click="popUpFunction()">                             
  <div class="card">
      <img class="card-image" src="{{card.thumbNail_image}}" alt="">
      <div class="popup">
          <span class="popuptext" id="myPopup">A Simple Popup!</span>
      </div>
      <div class="card-infos">                              
          <h2 class="card-title">{{card.contentDescription}}</h2>
      </div>
   </div>
</a>

这是css代码：

.popup {
  position: relative;
  display: inline-block;
  cursor: pointer;
  height:0px;
  width:0px;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
}

/* The actual popup */
.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;

  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 - hide and show the popup */
.popup .show {
  visibility: visible;
  -webkit-animation: fadeIn 1s;
  animation: fadeIn 1s;
}

/* Add animation (fade in the popup) */
@-webkit-keyframes fadeIn {
  from {opacity: 0;} 
  to {opacity: 1;}
}

@keyframes fadeIn {
  from {opacity: 0;}
  to {opacity:1 ;}
}

这是js代码：

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

Answer 1

您可以点击元素将事件传递给函数。 在事件对象中，您可以提取单击元素的目标属性。 这是一个快速演示来说明。

此外，您似乎点击了一个循环，我不知道 angularJS，但我认为它会是这样的：

<div class="card" ng-click="popUpFunction($event)">       // notice the $event

代替

<a class="external" ng-repeat="card in cardData" ng-click="popUpFunction()">                             

 function onClickShowMessage(event) { const card = event.target; const message = createMessageElement(); card.appendChild(message); } function createMessageElement() { const message = document.createElement('p'); message.innerHTML = 'This is some message'; message.classList.add('message'); return message; }

 .card { width: 200px; min-height: 150px; background-color: yellow; cursor: pointer; margin-bottom: 5px; display: block; } .message { background-color: firebrick; color: white; padding: 1rem; }

 <a class="card" onclick="onClickShowMessage(event)"></a> <a class="card" onclick="onClickShowMessage(event)"></a> <a class="card" onclick="onClickShowMessage(event)"></a>

Answer 2

为了解决这个问题，我将卡片的索引作为参数传递并在ng-if检查它

<a class="external" ng-repeat="card in cardData" ng-click="popUpFunction()">                             
  <div class="card">
      <img class="card-image" src="{{card.thumbNail_image}}" alt="">
      <div class="popup">
          <span class="popuptext" id="myPopup" ng-if="popUpIndex==$index">A Simple Popup!</span>
      </div>
      <div class="card-infos">                              
          <h2 class="card-title">{{card.contentDescription}}</h2>
      </div>
   </div>
</a>

这是脚本文件的变化：

$scope.popUpIndex = 0;
$scope.modalFunction = function (ind) {
    console.log(ind);
    $scope.popUpIndex = ind;
    var popup = document.getElementById("myPopup");
    popup.classList.toggle("show");
}