<!DOCTYPE html>
<html>
<body>
<h2>JavaScriptの約束</h2>
<p id="demo"></p>
<script>
function myDisplayer(some) {
document.getElementById("demo").innerHTML = some;
}
let myPromise = new Promise(function(myResolve, myReject) {
let req = new XMLHttpRequest();
req.open('GET', "mycar.html");
req.onload = function() {
if (req.status == 200) {
myResolve(req.response);
} else {
myReject("File not Found");
}
};
req.send();
});
