在 JavaScript 中确定日期是否为今天的最佳方法是什么？

Question

I have a date object in JavaScript and I want to figure out if that date is today. What is the fastest way of doing this?

My concern was around comparing date object as one might have a different time than another but any time on today's date should return true .

Answer 1

You could use toDateString :

var d = new Date()
var bool = (d.toDateString() === otherDate.toDateString());

Answer 2

The answers based on toDateString() will work I think, but I personally would avoid them since they basically ask the wrong question.

Here is a simple implementation:

function areSameDate(d1, d2) {
    return d1.getFullYear() == d2.getFullYear()
        && d1.getMonth() == d2.getMonth()
        && d1.getDate() == d2.getDate();
}

MDN has a decent overview of the JS Date object API if this isn't quite what you need.

Answer 3

var someDate = new Date("6 Dec 2011").toDateString();
var today = new Date().toDateString();
var datesAreSame = (today === someDate);

Answer 4

If both are Date() objects, you can use this to 'format' the date in a way that it will only compare on the year/month/day: if(inputDate.setHours(0,0,0,0) == todaysDate.setHours(0,0,0,0));

Nearly identical question: How to check if input date is equal to today's date?

Answer 5

我更喜欢使用时刻库

moment('dd/mm/yyyy').isSame(Date.now(), 'day');