头像上传 multer

需要注意的是， upload.single() 函数的参数必须是表单中文件的 name 值，这里我们假设我们表单中提交的文件 name 为 avatar。 当文件上传成功后，我们可以通过 req.file 属性来获取此文件的相关信息，例如文件名、文件类型、文件大小等。

File upload is a common feature that almost every website needs. We will go through step by step on how to handle single and multiple file(s) upload with Express, save it to database (LokiJs), and retrieve the saved file for viewing. 文件上传是几乎每个网站都需要的常见功能。

在專案中，只接收一個來自名為 avatar 欄位，且檔案格式為 jpg/jpeg/png 的圖片，因此將使用 upload.single(‘avatar’) 作為 Middleware ，帶入路由中，來處理 ...

Multer is a node.js middleware for handling multipart/form-data, which is primarily used for uploading files. It is written on top of busboy for maximum efficiency. NOTE: Multer will not process any form which is not multipart (multipart/form-data). This

Multer accepts an options object, the most basic of which is the dest property, which tells Multer where to upload the files. In case you omit the options object, the files will be kept in memory and never written to disk. In an average web app, only dest

So I'm currently attempting to create an avatar upload system with Express.js and multer but whenever I go and put it through the form it returns the error. MulterError: Unexpected field