POST form data using JavaScript's Fetch API - YouTube
Nicholas Mendez on Twitter: "@jaffathecake How do you serialize form data for JSON? I recently discovered formData.entries() but it returns the last selected value in a multi-select field instead of all the
How To Format Form Data as JSON | Engineering Education (EngEd) Program | Section
Fetch API Post example · GitHub
Can't send file via multipart/form request with Authorization header, 401 is returned · Issue #583 · github/fetch · GitHub
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Fetching data from the server - Learn web development | MDN