<!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 |