Automatic JSON date deserialization

deserialization.js

const DATE_PATTERN = /^\d{4}-\d{2}-\d{2}T\d{2}:\d{2}:\d{2}\.\d+$/;

function deserializeProperty(key, value) {
    return typeof value === "string" && DATE_PATTERN.test(value)
        ? new Date(value)
        : value;
}

const obj = JSON.parse('{ "date": "2016-04-26T18:09:16.61" }', deserializeProperty);
console.log(typeof obj.date);