[Vuejs]-Fetch request with multipart data fails in firefox but not safari

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strangely, this was fixed when I added a middleware on the express backend:


const express = require('express');
const multer = require('multer');

const app = express();

const upload = multer({
    dest: './uploads/'
})

app.post('/upload', upload.single('file'), (req, res) => {
  res.json({received: 'yes'})
})

app.listen(3344, () => console.log("running on localhost:3344"))

I still don’t know why it doesn’t work without the middleware in firefox, but in safari it does.

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