js- read drag and drop file directory
Article Directory
Preface
H5DragAPIand drop andFile APIcombine to create file information functiondropwithevent.dataTransfer.files
Recommended reading
- "JS Advanced Programming"
Show results
Code display
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style>
#droptarget{
background-color: aqua;
width: 400px;
height: 400px;
}
</style>
</head>
<body>
<div id="droptarget"></div>
<div id="output"></div>
<script src="main.js"></script>
</body>
</html>
main.js
let dropTarget = document.getElementById('droptarget');
function handleEvent(event) {
let info = '',
output = document.getElementById('output'),
files,
i,
len;
event.preventDefault();
if(event.type == 'drop'){
files = event.dataTransfer.files;
i = 0;
len = files.length;
while(i < len){
info += `${
files[i].name} (${
files[i].type}, ${
files[i].size} bytes)<br />`;
i++;
}
output.innerHTML = info;
}
}
dropTarget.addEventListener('dragenter', handleEvent);
dropTarget.addEventListener('dragover', handleEvent);
dropTarget.addEventListener('drop', handleEvent);