<!DOCTYPE html>
<html>
<body>
<h2>JavaScriptコールバック</h2>
<p id="demo"></p>
<script>
function myDisplayer(some) {
document.getElementById("demo").innerHTML = some;
}
function getFile(myCallback) {
let req = new XMLHttpRequest();
req.onload = function() {
if (req.status == 200) {
myCallback(this.responseText);
} else {
myCallback("Error: " + req.status);
}
}
req.open('GET', "mycar.html");
req.send();
}
