Get new Date class by one string (Cross-browsing available)

getDateByString.js

function getDateByString(dateStr) {

    // String 미입력 시 return
    if(dateStr == undefined || !dateStr || typeof dateStr != "string" || dateStr.length < 10) return;
    console.log(dateStr);

    // YMD
    var year  = parseInt(dateStr.substring(0, 4));
    var month = parseInt(dateStr.substring(5, 7)) - 1;
    var day   = parseInt(dateStr.substring(8, 10));
    console.log(year, month, day);

    // HMS
    if(dateStr.length > 10 && dateStr.length >= 20) {
        var hour = parseInt(dateStr.substring(11, 13));
        var min  = parseInt(dateStr.substring(14, 16));
        var sec  = parseInt(dateStr.substring(17, 19));
        console.log(hour, min, sec);
        return new Date(year, month, day, hour, min, sec);
    } else return new Date(year, month, day);

}