src/targets/javascript/fetch/fixtures/multipart-data.js
const url = 'http://mockbin.com/har';
const form = new FormData();
form.append('foo', 'Hello World');
form.append('bar', 'Bonjour le monde');
const options = {method: 'POST'};
options.body = form;
try {
const response = await fetch(url, options);
const data = await response.json();
console.log(data);
} catch (error) {
console.error(error);
}