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function getAge(dateString) {
var today = new Date();
var birthDate = new Date(dateString);
var age = today.getFullYear() - birthDate.getFullYear();
var m = today.getMonth() - birthDate.getMonth();
if (m < 0 || (m === 0 && today.getDate() <
birthDate.getDate())) {
age--;
}
return age;
}
document.querySelector("#age").innerHTML = getAge("1996/09/11");
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