Send POST request in Google Chrome

window-fetch-post.js

// Using "var" here to easily change the parameters and resubmit the code in a JS dev console!
var url = 'http://127.0.0.1:3000/login';

var parameters = {
  user: 'bennyn',
  password: 'secret'
};

fetch(url, {
  method: 'post',
  body: JSON.stringify(parameters)
})
.then((response) => response.json())
.then(console.log);