how to solve Invalid Date {} JavaScript-CodePudding

when I try to get the year, the month and the time of a date, I get Invalid Date {}

const d = new Date();
let time = new Date(d.getFullYear(), d.getMonth(), d.getTime());
document.getElementById("demo").innerHTML = time;

<div id='demo'></div>

CodePudding user response：

new Date().getTime() returns the number of milliseconds that have elapsed since midnight on Jan 1, 1970, while new Date().getDay(), which is what you're looking for, returns the current day.

const d = new Date();
let time = new Date(d.getFullYear(), d.getMonth(), d.getDay());
document.getElementById("demo").innerHTML = time;

<div id='demo'></div>

CodePudding user response：

well here are pair of errors in your code working with the javascript Date object API. d.getFullYear() gives 2022 and this is correct, and d.getMonth() returns the months starting by 0 but as you are showing the object directly you don't need to worry about that, the problem surges when you call d.getTime() that returns:

A number representing the milliseconds elapsed between 1 January 1970 00:00:00 UTC and the given date.

MDN reference

So maybe what you are trying to do is this instead:

        const d = new Date();           
        let time = new Date(d.getFullYear(), d.getMonth(), d.getUTCDate());
        document.getElementById("demo").innerHTML = time;

CodePudding user response：

the month argument range from 0 to 11 in javasript, to get the correct month try (d.getMonth() 1).

const d = new Date();

//I don't need utc date I need to ge the date on that form: year, month, time

let time = d.getUTCFullYear()   ","  (d.getMonth() 1)   "," d.getTime();

console.log("time",time);