我有一个包含3个可拖动对象和背景图像的面板。我的JavaScript脚本（基于interact.js）允许在背景图像上拖放对象。所有可拖动对象也是可复制的。这意味着每次从面板拖动原始对象时，都会克隆它。
现在我想添加一个弹出功能：当我点击一个对象时，会出现一个弹出消息。问题是弹出消息出现在原始对象旁边，而不是克隆的消息。我点击的对象（不包括原始对象）旁边会显示一条弹出消息。我该怎么做？这是与弹出窗口相关的JavaScript代码：
function myFunction() {
var popup = document.getElementById("myPopup");
popup.classList.toggle("show");
}
整个代码：
HTML（属于类drag-base的圆形对象示例）：
<div id="drag-base" class="popup draggable" onclick="myFunction()">
<span class="popuptext" id="myPopup">A Simple Popup!</span>
</div>
CSS：
#drag-base {
background: #d9534f;
color: #000000;
width: 35px;
height: 35px;
border-radius: 50%;
text-align: center;
-webkit-transform: translate(0px, 0px);
transform: translate(0px, 0px);
}
.dropzone {
background-color: #e9ebed;
padding: 10px;
width: 100%;
height: 600px;
overflow-y: scroll;
border: dashed 4px transparent;
float:left;
}
.drop-active {
border-color: #aaa;
}
.drop-target {
background-color: #3f5265;
color: #FFF;
border-color: #fff;
border-style: solid;
}
/* Popup container - can be anything you want */
.popup {
position: relative;
display: inline-block;
cursor: pointer;
-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;
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 - 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 ;}
}
JavaScript的：
<script type="text/javascript">
// target elements with the "draggable" class
interact('.draggable').draggable({
inertia: true,
restrict: {
restriction: ".dropzone",
drag: document.getElementById('dropzone'),
endOnly: true,
elementRect: { top: 0, left: 0, bottom: 1, right: 1 }
},
autoScroll: true,
onmove: function (event) {
var target = event.target;
var x = (parseFloat(target.getAttribute('data-x')) || 0) + event.dx;
var y = (parseFloat(target.getAttribute('data-y')) || 0) + event.dy;
target.style.transform = 'translate(' + x + 'px, ' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
},
onend: function(event) {
console.log(event);
}
})
.on('move', function (event) {
var interaction = event.interaction;
if (interaction.pointerIsDown && !interaction.interacting() && event.currentTarget.getAttribute('clonable') != 'false') {
var original = event.currentTarget;
var clone = event.currentTarget.cloneNode(true);
var x = clone.offsetLeft;
var y = clone.offsetTop;
clone.setAttribute('clonable','false');
clone.style.position = "absolute";
clone.style.left = original.offsetLeft+"px";
clone.style.top = original.offsetTop+"px";
original.parentElement.appendChild(clone);
interaction.start({ name: 'drag' },event.interactable,clone);
}
})
.resizable({
edges: { left: true, right: true, bottom: true, top: true }
})
.on('resizemove', function (event) {
var target = event.target;
x = (parseFloat(target.getAttribute('data-x')) || 0),
y = (parseFloat(target.getAttribute('data-y')) || 0);
// update the element's style
target.style.width = event.rect.width + 'px';
target.style.height = event.rect.height + 'px';
// translate when resizing from top or left edges
x += event.deltaRect.left;
y += event.deltaRect.top;
target.style.webkitTransform = target.style.transform =
'translate(' + x + 'px,' + y + 'px)';
target.setAttribute('data-x', x);
target.setAttribute('data-y', y);
//target.textContent = event.rect.width + '×' + event.rect.height;
});
// enable draggables to be dropped into this
interact('.dropzone').dropzone({
// Require a 50% element overlap for a drop to be possible
overlap: 0.50,
// listen for drop related events:
ondropactivate: function (event) {
// add active dropzone feedback
event.target.classList.add('drop-active');
},
ondragenter: function (event) {
var draggableElement = event.relatedTarget,
dropzoneElement = event.target;
// feedback the possibility of a drop
dropzoneElement.classList.add('drop-target');
},
ondragleave: function (event) {
// remove the drop feedback style
event.target.classList.remove('drop-target');
},
ondrop: function (event) {
//event.relatedTarget.textContent = 'Dropped';
},
ondropdeactivate: function (event) {
// remove active dropzone feedback
event.target.classList.remove('drop-active');
event.target.classList.remove('drop-target');
}
});
$(".dropzone").html("<img src='https://s-media-cache-ak0.pinimg.com/originals/fb/d5/55/fbd5556e0e364b31166bebfce433c14e.jpg'>");
// When the user clicks on div, open the popup
function myFunction() {
var popup = document.getElementById("myPopup");
popup.classList.toggle("show");
}
</script>
答案 0 :(得分：1)
使用类而不是ID，并使用DOM遍历查找单击元素内的弹出窗口。将单击的元素传递给函数：
<div id="drag-base" class="popup draggable" onclick="myFunction(this)">
<span class="popuptext" id="myPopup">A Simple Popup!</span>
</div>
然后在函数中使用它：
function myFunction(div) {
div.querySelector(".popuptext").classList.toggle("show");
}