Ajax POST request with data [ Obsolete, use fetch instead ]

Ajax POST request.js

let data1 = 'Hello World!';
let data2 = 'Hello Universe!';
let http = new XMLHttpRequest();
http.open( 'POST', 'post.php' );
http.setRequestHeader( 'Content-Type', 'application/x-www-form-urlencoded' );
http.send( 'data1=' + data1 + '&data2=' + data2 );
http.onreadystatechange = function()
{
	if ( http.readyState == 4 && http.status == 200 )
	{
		console.log( http.responseText );
	}
}