<!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>
</head>
<body>
<input type="file" id="scwj" />
<button onclick="xztp()">下载图片</button>
<img src="" id="img" alt="暂无" width="50" height="50" />
<script>
//先把图片上传显示出来
var filename = document.getElementById("scwj");
var img = document.getElementById("img");
filename.onchange = function () {
img.src = URL.createObjectURL(this.files[0]);
};
//加一个a标签，获取图片的流，点download下载就好了
function xztp() {
var bqa = document.createElement("a");
console.log(bqa);
bqa.setAttribute("href", URL.createObjectURL(filename.files[0]));
bqa.setAttribute("download", filename.name);
bqa.click();
}
</script>
</body>
</html>
js+html实现图片的上传和下载
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Origin blog.csdn.net/liulang68/article/details/120588718
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