<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Test</title>
</head>
<body>
<script>
let phone = prompt("请输入11位的手机号: ");
console.log(typeof phone);
if(phone.length !== 11) {
alert('输入的手机号不合法请重新输入!');
}
function check_phone(phone_numbers) {
let cen = phone_numbers.slice(3, 8);
return phone_numbers.replace(cen,"*****");
}
let result = check_phone(phone);
alert("处理后的结果:"+result);
</script>
</body>
</html>
当输入123456的时候还是会输出" 处理后的结果: ",问:如何在满足if条件语句的时候停止程序执行?