<!DOCTYPE html>
<html>
<body>
<h2>JavaScript関数</h2>
<p>この例では、myFunction は関数コンストラクターです。</p>
<p id="demo"></p>
<script>
function myFunction(arg1, arg2) {
this.firstName = arg1;
this.lastName = arg2;
}
const myObj = new myFunction("John","Doe")
document.getElementById("demo").innerHTML = myObj.firstName;
</script>
</body>
</html>
