Fetch API js

fetch.js

var create = function(name) {
	var data = JSON.stringify({
		title: name, author: 'Gemma'
	})

	fetch('http://localhost:3000/posts', {
		method: 'POST',
		body: data,
		headers: { 
			'Accept': 'application/json',
			'Content-Type': 'application/json'
		}
	})
	.then(function(res){ return res.json(); })
	.then(function(response) {
        console.log(response);
    }).catch(function(err) {
        console.log(err)
    })
}

var get = function(id) {
    var url = (typeof id == 'undefined') 
		? 'http://localhost:3000/posts' 
		: 'http://localhost:3000/posts/' + id;

	fetch(url)
		.then((resp) => resp.json())
		.then(function(response) {
			console.log(response)
    	})
		.catch(function(err) {
			console.log(err);
    	})
}