pointer-events: none; 已经被实现，在调试中，布尔值在“拖动”和“draggingOL”两者之间迅速切换。
HTML结构
<ol id="product-images" @dragenter="draggingOL=true" @dragleave="draggingOL=false">
<li v-for="(file, key) in files" style="pointer-events: none;"></li>
</ol>
<div v-show="files.length < 1 || draggingOL == true">
<div ref="fileform" :class="['next-upload-dropzone', dragging ? 'css1' : '', draggingOL ? 'css1 css2' : '']" @dragenter="dragging=true" @dragleave="dragging=false">
</div>
</div>
基本上，当您将图像拖入DIV标记后，OL标记将出现。
OL标记没有可拖动属性，因此我将Dragenter和leave添加到了OL中。
当我将第二个dragenter添加到OL标记时，当您将图像拖入该区域时，dragging和draggingOL的布尔值将在0.5秒间隔内迅速在true和false之间切换。CSS也是如此，非常快速地显示和隐藏。
我尝试了几种方法，包括仅使用一个dragenter ONLY，但问题仍然存在。也许问题出在v-show上，我不确定。
以上是DIV标记的图片
以上是OL标记的图片
Javascript
var dropFileApp = new Vue({
el: '#dropfile',
data: {
dragAndDropCapable: false,
dragging : false,
draggingOL : false,
files: [],
uploadPercentage: 0
},
// define methods under the `methods` object
mounted(){
/*
Determine if drag and drop functionality is capable in the browser
*/
this.dragAndDropCapable = this.determineDragAndDropCapable();
/*
If drag and drop capable, then we continue to bind events to our elements.
*/
if( this.dragAndDropCapable ){
/*
Listen to all of the drag events and bind an event listener to each
for the fileform.
*/
['drag', 'dragstart', 'dragend', 'dragover', 'dragenter', 'dragleave', 'drop'].forEach( function( evt ) {
/*
For each event add an event listener that prevents the default action
(opening the file in the browser) and stop the propagation of the event (so
no other elements open the file in the browser)
*/
this.$refs.fileform.addEventListener(evt, function(e){
e.preventDefault();
e.stopPropagation();
}.bind(this), false);
}.bind(this));
/*
Add an event listener for drop to the form
*/
this.$refs.fileform.addEventListener('drop', function(e){
/*
Capture the files from the drop event and add them to our local files
array.
*/
for( let i = 0; i < e.dataTransfer.files.length; i++ ){
this.files.push( e.dataTransfer.files[i] );
this.getImagePreviews();
}
console.log((this.files.length))
/*
Instantly upload files
*/
this.submitFiles();
}.bind(this));
}
},
methods: {
/*
Determines if the drag and drop functionality is in the
window
*/
determineDragAndDropCapable(){
/*
Create a test element to see if certain events
are present that let us do drag and drop.
*/
var div = document.createElement('div');
/*
Check to see if the `draggable` event is in the element
or the `ondragstart` and `ondrop` events are in the element. If
they are, then we have what we need for dragging and dropping files.
We also check to see if the window has `FormData` and `FileReader` objects
present so we can do our AJAX uploading
*/
return ( ( 'draggable' in div )
|| ( 'ondragstart' in div && 'ondrop' in div ) )
&& 'FormData' in window
&& 'FileReader' in window;
},
/*
Gets the image preview for the file.
*/
getImagePreviews(){
/*
Iterate over all of the files and generate an image preview for each one.
*/
for( let i = 0; i < this.files.length; i++ ){
/*
Ensure the file is an image file
*/
if ( /\.(jpe?g|png|gif)$/i.test( this.files[i].name ) ) {
/*
Create a new FileReader object
*/
let reader = new FileReader();
/*
Add an event listener for when the file has been loaded
to update the src on the file preview.
*/
reader.addEventListener("load", function(){
this.$refs['preview'+parseInt( i )][0].src = reader.result;
}.bind(this), false);
/*
Read the data for the file in through the reader. When it has
been loaded, we listen to the event propagated and set the image
src to what was loaded from the reader.
*/
reader.readAsDataURL( this.files[i] );
}else{
/*
We do the next tick so the reference is bound and we can access it.
*/
this.$nextTick(function(){
this.$refs['preview'+parseInt( i )][0].src = '/images/file.png';
});
}
}
},
/*
Submits the files to the server
*/
submitFiles(){
/*
Initialize the form data
*/
let formData = new FormData();
/*
Iteate over any file sent over appending the files
to the form data.
*/
for( var i = 0; i < this.files.length; i++ ){
let file = this.files[i];
formData.append('files[' + i + ']', file);
}
/*
Make the request to the POST /file-drag-drop URL
*/
axios.post( '/file-drag-drop',
formData,
{
headers: {
'Content-Type': 'multipart/form-data'
},
onUploadProgress: function( progressEvent ) {
//Showing Loading
}.bind(this)
}
).then(function(){
console.log('SUCCESS!!');
})
.catch(function(){
console.log('FAILURE!!');
});
},
/*
Removes a select file the user has uploaded
*/
removeFile( key ){
this.files.splice( key, 1 );
}
}
})
我将继续测试、调试和更新这个线程。
v-show正在切换可见性。当可见性改变时，drag-leave也会发生变化。你能否提供一个 jsfiddle 或者可运行的代码来隔离这个问题？这样可能更容易提供解决方案。 - Daniel