fetch('http://localhost:3000/posts', { method: 'POST', headers: { 'Content-Type': 'application/json', }, body: JSON.stringify({ title: "My First Post", content: "This is some data saved to database.json!" }), }) .then(response => response.json()) .then(data => console.log('Success:', data)); Use code with caution. Copied to clipboard 2. Using Node.js (Direct File Writing)
: JSON requires double quotes for keys and string values; single quotes will cause an error. database.json
If you want to treat database.json like a real REST API, json-server is the standard choice. { method: 'POST'