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postFormData('', {user: 'Mary'})
.then(data => console.log(data))
function postFormData(url, data) {
return fetch(url, {
method: 'POST', // 'GET', 'PUT', 'DELETE', etc.
body: new URLSearchParams(data),
headers: new Headers({
'Content-type': 'application/x-www-form-urlencoded; charset=UTF-8'
.then(response => response.json())
.catch(error => console.error(error))
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