Request Parameters
Session Data
Uploading Files
Embedded JavaScript
Templates
Modules
Reading Files
Sending Requests
API

Make File Input: In your HTML, make a file input:

<input type="file">

Send Request: In your client JavaScript, send a POST request with a FormData object:

let formData = new FormData()
formData.append(`yourKey`, yourFileInput.files[0])

let request = new XMLHttpRequest()
request.open(`POST`, `/your-route`)
request.send(formData)

Add Package: express-fileupload

Include Module:

let fileUpload = require(`express-fileupload`)

Use Middleware:

app.use(fileUpload())

Add Folder: Add a new folder for uploaded files.

Make Endpoint: Make an endpoint to match your file upload request.

Save File: In your file upload endpoint, get the file from the request, and save it to the new folder:

let file = request.files.yourKey
file.mv(`${__dirname}/your-folder/${file.name}`)

More Info: npm page