XHR http library example (GET, POST, PUT DELETE)

httpLibraryExample.js

function easyHTTP() {
	this.http = new XMLHttpRequest();
}

// Make an HTTP GET Request
easyHTTP.prototype.get = function (url, callback) {
	this.http.open('GET', url, true);

	let self = this;
	this.http.onload = function () {
		if (self.http.status === 200) {
			callback(null, self.http.responseText);
		} else {
			callback('Error: ' + self.http.status);
		}
	};

	this.http.send();
};

// Make an HTTP POST Request
easyHTTP.prototype.post = function (url, data, callback) {
	this.http.open('POST', url, true);
	this.http.setRequestHeader('Content-type', 'application/json');

	let self = this;
	this.http.onload = function () {
		callback(null, self.http.responseText);
	};

	this.http.send(JSON.stringify(data));
};

// Make an HTTP PUT(update) Request
easyHTTP.prototype.put = function (url, data, callback) {
	this.http.open('PUT', url, true);
	this.http.setRequestHeader('Content-type', 'application/json');

	let self = this;
	this.http.onload = function () {
		callback(null, self.http.responseText);
	};

	this.http.send(JSON.stringify(data));
};

// Make an HTTP DELETE Request
easyHTTP.prototype.delete = function (url, callback) {
	this.http.open('DELETE', url, true);

	let self = this;
	this.http.onload = function () {
		if (self.http.status === 200) {
			callback(null, 'Post Deleted');
		} else {
			callback('Error: ' + self.http.status);
		}
	};

	this.http.send();
};