<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>
</head>
<body>
<div id="box">点击</div>
<a href="./1.txt" download>下载</a>
</body>
<script>
var box = document.getElementById('box');
console.log(box);
box.onclick = function (){
download('1.txt');
var form = document.getElementsByClassName('form')[0];
console.log(form);
console.log(form.src)
}
// 弹出对话框 可以设置大小
//window.open ('1.txt', 'newwindow', 'height=100, width=400, top=0, left=0, toolbar=no, menubar=no, scrollbars=no, resizable=no,location=n o, status=no');
//
function download(url){
var iframe = document.createElement("iframe")
iframe.style.display = "none";
iframe.src = url;
iframe.className = 'form';
document.body.appendChild(iframe);
}
</script>
</html>