1.HTML
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><title>上传文件</title><link rel="stylesheet" href="../css/upload.css">
</head>
<body><div class="upload"><h3>上传文件</h3><div></div><input type="file"></div>
</body>
</html>
<script src="../js/upload.js"></script>
2.CSS
*{margin: 0;padding: 0;}
ul,li,ol{list-style-type: none;}
button{cursor: pointer;border: none;background: rgba(255, 255, 255, 1);}
.upload{width: 170px;height: 200px;margin: 200px auto;border: 1px #ccc solid;display: flex;flex-direction: column;align-items: center;position: relative;
}
h3{width: 100%;height: 30px;border-bottom: 1px #ccc solid;
}input{width: 170px;height: 170px;position: absolute;opacity: 0;
}
.upload>div{width: 170px;height: 170px;background: url(../image/upload.png) no-repeat center center/30% 30%;
}3.JS
const formData = new FormData();
const fileField = document.querySelector('input[type="file"]');
fileField.addEventListener('change', function() {formData.append("file", fileField.files[0],encodeURIComponent(fileField.files[0].name));fetch("http://localhost:8080/api/upload", {method: "POST",body: formData,}).then(response => response.json()).then(res => {console.log("res:", res);}).catch(err => {console.log("err:", err);});
});4.资源
5.运行截图
6.下载链接
在此处下载压缩包
【免费】原生html，js上传文件资源-CSDN文库
7.注意事项
此压缩包 包含前后端简单交互，后端需要用到Node.js，运行口令 nodemon app.js
或者在serve文件夹直接运行run.bat文件，运行成功后打开html即可。注意：run.bat运行成功后不要退出cmd。
