<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>sample</title>
</head>
<body>
<button id='btn'>下载</button>
<span id='status'></span>
</body>
<script>
var url ="http://localhost/sample/upload.php";
document.getElementById('btn').onclick =function() {
document.getElementById('status').innerHTML ='下载中';
fetch(url).then(res => res.blob().then(blob => {
var a = document.createElement('a');
var url = window.URL.createObjectURL(blob);
var filename = res.headers.get('Content-Disposition');
a.href = url;
a.download = filename;
a.click();
window.URL.revokeObjectURL(url);
document.getElementById('status').innerHTML ='下载完成';
}));
};
</script>
</html>
总结 以上所述是小编给大家介绍的JavaScript 用fetch 实现异步下载文件功能。 转载至:https://www.jb51.net/article/119252.htm |