события указателя: нет;уже реализован, в отладке логическое значение быстро переключалось между истиной и ложью как для "перетаскивания", так и для перетаскиванияOL "
Структура HTML
<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>
В основном после перетаскивания изображения вDIV-тег, появится OL-тег.
В OL-теге нет перетаскиваемого элемента, поэтому я добавил Dragenter и ушел в OL
Когда я добавляю второй Dragenter в OL-тег, когда выперетаскивая изображение в область, логическое значение dragging & draggingOL быстро переключается между true и false с интервалом 0,5 с. То же самое для css, show и unshow очень быстро.
Я пробовал несколько способов, включая толькоТОЛЬКО один драгентер, та же проблема. Возможно, проблема связана с v-show, я не уверен.
"> Выше приведено изображение тега DIV 
Выше приведен образ тега OL
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 );
}
}
})
Я продолжу тестировать, отлаживать и обновлять этот поток.