function mainFunc() {
    dueDate = "30/12/2014";
    var firstReminderDate = dueDate;
    var today = new Date();
    var firstDate = convertToDate(firstReminderDate);
    if (today > firstDate) {
        //send reminder to A
    } else {
        // send reminder to B
    }
}

function convertToDate(dateString) {
    var dateData = dateString.split("/");
    var date = new Date(new Date().setFullYear(dateData[0], dateData[1] - 1, dateData[2]));
    return new Date(date);
}

我需要比较两个日期而不是时间,以及如何删除时间部分并仅比较日期?
convertToDate()是否每次都会返回“Thu Jan 01 05:30:00 GMT + 05:30 1970”?

最佳答案

您可以简化代码。要从dd/mm/yyyy获取日期,只需将/拆分,反转结果并将其加入'/'即可得到yyyy/mm/dd,这是新Date与其他Date进行比较的有效输入。见片段

var report = document.querySelector('#result');
report.innerHTML += '30/12/2014 => '+ mainFunc('30/12/2014');
report.innerHTML += '<br>01/12/2014 => '+ mainFunc('01/01/2014');

function mainFunc(due) {
    due = due ? convertToDate(due) : new Date;
    return new Date > due
           ? due +' passed: <b>send reminder to A</b>'
           : due +' not passed: <b>send reminder to B</b>';
}

function convertToDate(dateString) {
    return new Date(dateString.split("/").reverse().join('/'));
}
<div id="result"></div>

09-25 19:37