How can I fix my Javascript stopwatch with the 00:00 time format? (Seconds:Milliseconds)

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Is there any way to get this to run a stopwatch? I dont need any start or stop buttons, it should just run a stopwatch when the page loads and the stopwatch needs to keep running.

I have gotten everything else to work, but I cannot find a function that uses a format of 00:00 for a stopwatch. Is there any command that does that?

The "d.getSeconds()" isnt doing that for me.

new Date();
var testVar = window.setInterval(update, 10);

function update() {
  var d = new Date();
  document.getElementById("seconds").innerHTML = d.getSeconds();
}
#seconds {
  background-color: yellow;
  max-width: 17%;
}
<!DOCTYPE html>

<head>
  <title>
    Stop Watch
  </title>

</head>

<body>
  <h1>
    Stop Watch
  </h1>
  <p>Elapsed Time:</p>
  <p id="seconds"></p>


</body>

The way you're doing it, the stopwatch could start at any random number (because it starts at the current seconds). I'd suggest simply making your own below. However, if you don't want to make your own, look at the second or third snippet.

var testVar = window.setInterval(update, 10);
var seconds = 0;
var milliseconds = 1;

function update() {
  if (milliseconds == 100) {
    milliseconds = 0;
    seconds++;
  }
  
  if (milliseconds < 10 && seconds < 10) {
    document.getElementById("seconds").innerHTML = 
    "0" + seconds + ":0" + milliseconds;
  }
  else if (milliseconds < 10 && seconds >= 10) {
    document.getElementById("seconds").innerHTML = 
    seconds + ":0" + milliseconds;
  }
  else if (milliseconds >= 0 && seconds < 10) {
    document.getElementById("seconds").innerHTML = 
    "0" + seconds + ":" + milliseconds;
  }
  else if (milliseconds >= 0 && seconds >= 10) {
    document.getElementById("seconds").innerHTML = 
    seconds + ":" + milliseconds;
  }
  milliseconds++;
}
#seconds {
  background-color: yellow;
  max-width: 17%;
}
<!DOCTYPE html>

<head>
  <title>
    Stop Watch
  </title>
</head>

<body>
  <h1>
    Stop Watch
  </h1>
  <p>Elapsed Time:</p>
  <p id="seconds">00:00</p>

How can I fix my Javascript stopwatch with the 00:00 , How can I fix my Javascript stopwatch with the 00:00 time format? setInterval( update, 10); var seconds = 0; var milliseconds = 1; function� Stack Overflow Public questions and answers; Teams Private questions and answers for your team; Enterprise Private self-hosted questions and answers for your enterprise; Jobs Programming and related technical career opportunities

You can use padStart, as well as some math, to format the stopwatch:

window.setInterval(update, 1000);
function update(){
    var d = new Date();
    var minutes = Math.floor(d.getSeconds() / 60)
    var seconds = d.getSeconds() % 60
    var time = `${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`
    document.getElementById("seconds").innerHTML = time
}
<h1>Stop Watch</h1>
<p>Elapsed Time:</p>
<p id="seconds"></p>

MySQL TIME_FORMAT() Function, and Usage. The TIME_FORMAT() function formats a time by a specified format. %r, Time in 12 hour AM or PM format (hh:mm:ss AM/PM). %S, Seconds (00� Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

Here is some code that breaks it down and formats correctly.

Note: We have a base 'start' date to subtract, this allows us to work like a true stopwatch.

let base = Date.now(); // Milliseconds
var testVar = window.setInterval(update, 10);

const displayNum = (num) => num.toString().padStart(2,'0');

function update() {
  let mil = Date.now() - base;
  let sec = Math.floor( mil/1000 );
  mil = mil%1000;
  let min = Math.floor( sec/60 );
  sec = sec%60;
  document.getElementById("seconds").innerHTML = `${displayNum(min)}:${displayNum(sec)}:${displayNum(mil)}`;
}
#seconds {
  background-color: yellow;
  max-width: 17%;
}
<!DOCTYPE html>

<head>
  <title>
    Stop Watch
  </title>

</head>

<body>
  <h1>
    Stop Watch
  </h1>
  <p>Elapsed Time:</p>
  <p id="seconds"></p>


</body>

JavaScript Date Objects, Object lets us work with dates: Tue Jul 28 2020 17:00:00 GMT-0700 (Pacific Daylight Time) new Date() new Date(year, month, day, hours, minutes, seconds, milliseconds) Displaying Dates. JavaScript will (by default) output dates in full text string format: For Helping Us! Your message has been sent to W3Schools. To get the number of seconds, we can generate a date using the current day and time 00:00:00, then substract it from “now”. The difference is the number of milliseconds from the beginning of the day, that we should divide by 1000 to get seconds:

Time Validation In Javascript For 12 Hours, It will also take other time format strings of hours and minutes without specifying the format. It should have case-insensitive AM or PM. js that you can drop in your website folder and use Does anyone know of a way I can fix this in Alteryx ? This method can also be used to set the minutes, seconds and milliseconds. Teams. Q&A for Work. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information.

Date, JavaScript Date objects represent a single moment in time in a available to obtain a date in various formats, as well as to perform time zone conversions. of milliseconds elapsed since January 1, 1970 00:00:00 UTC, with leap seconds ignored. Get the number of seconds since the ECMAScript Epoch. Many quantities in After Effects are either points in time or spans of time, including the current time, layer In and Out points, and durations of layers, footage items, and compositions. By default, After Effects displays time in Society of Motion Picture and Television Engineers (SMPTE) timecode: hours, minutes, seconds, and frames. You can

jsmreese/moment-duration-format: Format function plugin , Format function plugin for the Moment Duration object. When using this plugin in the browser, if you do not include moment.js on your page first, you need For some time duration formats, a zero-padded value is required. "00:00:99" moment.duration(1011, "milliseconds").format("mm:ss:SS", { trim: false }); // "00:01 :01"� Time.is displays exact, official atomic clock time for any time zone (more than 7 million locations) in 52 languages. Automated access is prohibited. Support for cookies and JavaScript is required.

Comments
  • Is there any way to do this with "Seconds"."Milliseconds"? I tried playing with your code, but it just gave me (example) 55.996. Where the 55 would go up in seconds and the milliseconds would only change the "6". The 99 would stay there.
  • @JohnDoee I'm pretty sure there is. I'll work on it right now
  • @JohnDoee I updated both snippets to be Seconds:Milliseconds
  • @JohnDoee the reason it didn't work for you was because 1. It updated every second so the milliseconds wouldn't change. You needed to change the window.setInterval(). 2. The milliseconds gave you 3 digits because that's how milliseconds are. I had to divide by 10 to get it to 2 digits
  • Thanks. I hadn't thought of that. But after looking at your code, it makes sense.