I use this code to open Message app automatically:
function getMobileOperatingSystem() {
var userAgent = navigator.userAgent || navigator.vendor || window.opera;
if (/windows phone/i.test(userAgent)) {
window.open('sms:+989123122223?body=s');
}
if (/android/i.test(userAgent)) {
window.open('sms:+989123122223?body=a');
}
if (/iPad|iPhone|iPod/.test(userAgent) && !window.MSStream) {
window.open('sms:+989123122223&body=b');
}
}
getMobileOperatingSystem(); <!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
</head>
<body>
</body>
</html>but it is only opening a blank page and nothing will happen. how can I fix my script and open Message app automatically?