counter that i can change time to remain if i want from db
i have a time stamp in table in db that maybe change
now i want for example every 30sec check that and if changed my down-counter changing
my js script is:
<script>
var seconds = 100;
function secondPassed() {
var minutes = Math.round((seconds - 30)/60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = '0' + remainingSeconds;
}
document.getElementById('countdown').innerHTML = minutes + ':' + remainingSeconds;
if (seconds == 0) {
clearInterval(countdownTimer);
document.getElementById('countdown').innerHTML = 'Times Up!';
document.getElementById('passage_text').disabled = true;
} else {
seconds--;
}
}
var countdownTimer = setInterval('secondPassed()', 1000);
</script>
Try changing this:
var countdownTimer = setInterval('secondPassed()', 1000);
to this:
var countdownTimer = setInterval(secondPassed, 1000);
What isn't working in your case, exactly?
BTW: Try caching reference on frequently used DOM element. See this alternative using much simpler code for formatting your time.
var display = document.getElementById('countdown');
var seconds = 100, timer;
function secondPassed() {
if ( --seconds == 0 ) {
window.clearInterval( timer );
// your code here executing when count down has finished ...
} else {
display.innerHTML = Math.floor( seconds / 60 ) + ':' + String( "0" + ( seconds % 60 ) ).substr( -2 );
}
}
timer = window.setInterval( secondPassed, 1000 );
Related
I have a simple question. I want to make this code work with the Reset time button when the time is start again from 30 min delete the ( You are Ready! ) and start the time
var seconds = 30;
function secondPassed() {
var minutes = Math.round((seconds - 30) / 60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = "0" + remainingSeconds;
}
document.getElementById('countdown').innerHTML = minutes + ":" + remainingSeconds;
if (seconds == 0) {
clearInterval(countdownTimer);
document.getElementById('countdown').innerHTML = "You are Ready!";
} else {
seconds--;
}
}
var countdownTimer = setInterval('secondPassed()', 1000);
<span id="countdown" class="timer">
Reset time
I created a new function to reset the seconds and restart the timer and linked it to the button. I have also isolated at the start of the js code the variables that will count the seconds and hold the reference to the Interval.
is this what you are looking for?
var seconds;
var countdownTimer;
function startTimer() {
if (!seconds || seconds == 0) {
seconds = 30;
clearInterval(countdownTimer);
countdownTimer = setInterval(secondPassed, 1000)
secondPassed();
}
}
function secondPassed() {
var minutes = Math.round((seconds - 30) / 60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = "0" + remainingSeconds;
}
document.getElementById('countdown').innerHTML = minutes + ":" + remainingSeconds;
if (seconds == 0) {
clearInterval(countdownTimer);
document.getElementById('countdown').innerHTML = "You are Ready!";
} else {
seconds--;
}
}
startTimer();
<html>
<body>
<div>
<span id="countdown" class="timer"></span>
</div>
Reset time
</body>
</html>
Here create a separate function where after clicking - it disables the button, sets the timer, and changes button text.
In secondPassed method, if seconds == 0, it enables the button, so that you can start count down again.
var seconds = 30;
var countdownTimer;
function secondPassed() {
var minutes = Math.round((seconds - 30) / 60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = "0" + remainingSeconds;
}
document.getElementById('countdown').innerHTML = minutes + ":" + remainingSeconds;
if (seconds == 0)
{
clearInterval(countdownTimer);
document.getElementById('reset').disabled = false;
document.getElementById('countdown').innerHTML = "You are Ready!";
} else
{
seconds--;
}
}
function start(){
seconds = 30;
document.getElementById('reset').innerHTML = "Reset";
document.getElementById('reset').disabled = true;
countdownTimer = setInterval('secondPassed()', 1000);
}
//on load call
start();
<div>
<span id="countdown" class="timer"/>
</div>
<button id="reset" onclick="start()">
Start
</button>
Let's assume something quite basic, like the following:
<div>00:00</div>
<button>Reset</button>
Below is an approach you could take, fully-commented.
// We'll start by getting a couple element references
const label = document.querySelector("div");
const button = document.querySelector("button");
// Next, we'll bind-up the click handler for the button
button.addEventListener("click", () => {
// When the user clicks the button, we'll set the time
// limit to 30 minutes and proceed
let timer = 60 * 30;
// Disable the button to prevent further clicks
button.disabled = true;
button.dataset.default = button.textContent;
button.textContent = "Now counting down!";
// Let's setup some code that will be executed every second
button.interval = setInterval(() => {
// This decimal will be a number like 29.9521
const decimal = timer / 60;
// We'll convert 29.9521 into 29, for 29 minutes
const wholeMinute = Math.floor(decimal);
// Next, we'll take the .9521 and multiply by 60 for seconds
const wholeSecond = Math.round(60 * (decimal - wholeMinute));
// We'll pad both of the numbers so they always have a leading 0
const lblMin = wholeMinute.toString().padStart(2, 0);
const lblSec = wholeSecond.toString().padStart(2, 0);
// As long as we aren't out of seconds
if (timer >= 0) {
// Reduce the timer by 1 second
timer = timer - 1;
// And print the new label on our label element
label.textContent = `${ lblMin }:${ lblSec }`;
// Then return, so we don't execute what comes next
return;
}
// If we made it this far, our timer ran out
// Start by enabling the button
button.disabled = false;
// Restore the original text of the button
button.textContent = button.dataset.default;
// And clear our interval, as it is no longer needed
clearInterval(button.interval);
// Our interval will 'tick' once every second (1000 milliseconds)
}, 1000);
});
I have searched all over internet a lot but could not find solution.
I want a timer with descending order with minutes, seconds and milliseconds. i.e. 05:59:999 -> 5 Minutes, 59 Seconds, 999 Milliseconds.
Below is my code which give me just minutes and seconds :
var countdownTimer = '';
var upgradeTime = 300; // total sec row from the table
var seconds = upgradeTime;
function timer()
{
var days = Math.floor(seconds/24/60/60);
var hoursLeft = Math.floor((seconds) - (days*86400));
var hours = Math.floor(hoursLeft/3600);
var minutesLeft = Math.floor((hoursLeft) - (hours*3600));
var minutes = Math.floor(minutesLeft/60);
var remainingSeconds = seconds % 60;
document.getElementById('timer1').innerHTML = pad(minutes) + " : " + pad(remainingSeconds);
document.getElementById("timer1").style.border = "1px solid";
document.getElementById("timer1").style.padding = "4px";
}
function pad(n)
{
return (n < 10 ? "0" + n : n);
}
$('#acstart').on('click', function(e) // Start the timer
{
clearInterval(countdownTimer);
countdownTimer = setInterval('timer()', 1000);
});
I found fiddle with seconds and milliseconds here is the link :
http://jsfiddle.net/2cufprgL/1/
On completion of the timer I need to call other action.
Thanks
Using the fiddle you included, you only need to update the displayCount function to get the result you want.
function displayCount(count) {
let res = Math.floor(count / 1000);
let milliseconds = count.toString().substr(-3);
let seconds = res % 60;
let minutes = (res - seconds) / 60;
document.getElementById("timer").innerHTML =
minutes + ' min ' + seconds + ' s ' + milliseconds + ' ms';
}
Note that your fiddle has the correct approach to countdown, everytime the timer ticks it measures the actual time left it doesn't assume that the timer was 'on time'.
I wouldn't call this clean. But I did follow through using your code. I did change it to recursive setTimeout() though.
What I did is call the interval faster than 1000ms, set a specific speed variable and then properly decrement seconds while checking for a flag when seconds becomes 0, this flag then calls stopTimer().
var countdownTimer = '';
var upgradeTime = 3; // total sec row from the table
var seconds = upgradeTime;
var milliseconds = seconds * 1000;
var speed = 50; //interval speed
function timer()
{
milliseconds = (seconds * 1000) - speed; //decrement based on speed
seconds = milliseconds / 1000; //get new value for seconds
var days = Math.floor(seconds/24/60/60);
var hoursLeft = Math.floor((seconds) - (days*86400));
var hours = Math.floor(hoursLeft/3600);
var minutesLeft = Math.floor((hoursLeft) - (hours*3600));
var minutes = Math.floor(minutesLeft/60);
var remainingSeconds = (seconds % 60).toFixed(3);
if(seconds <= 0){ stopTimer(); return; } //sets a flag here for final call
document.getElementById('timer1').innerHTML = pad(minutes) + " : " + pad(remainingSeconds);
document.getElementById("timer1").style.border = "1px solid";
document.getElementById("timer1").style.padding = "4px";
setTimeout('timer()', speed);
}
function stopTimer(){
clearTimeout(countdownTimer);
console.log("IT HAS BEEN DONE");
document.getElementById('timer1').innerHTML = "00 : 00.000"
}
function pad(n)
{
return (n < 10 ? "0" + n : n);
}
clearTimeout(countdownTimer)
countdownTimer = setTimeout('timer()', speed);
<div id="timer1"></div>
Something that sorta works logically right now. It's a tad unstable because of what I was trying to do. https://codesandbox.io/s/8xr1kx8r68
Momentjs with Countdown library - its a little outdated and unmaintained but looks like it does something like what you want.
https://github.com/icambron/moment-countdown
http://countdownjs.org/readme.html
I am designing a javaScript countdown for 3 hours using the below code
<div id="timer"></div>
<script type="text/javascript">
var count = 10800;
var counter = setInterval(timer, 1000); //1000 will run it every 1 second
function timer() {
count = count - 1;
if (count == -1) {
clearInterval(counter);
return;
}
var seconds = count % 60;
var minutes = Math.floor(count / 60);
var hours = Math.floor(minutes / 60);
minutes %= 60;
hours %= 60;
document.getElementById("timer").innerHTML = hours + "hours " + minutes + "minutes and " + seconds + " seconds left to complete this transaction"; // watch for spelling
}
</script>
but the only issue I am having here is whenever I refresh the page the countdown starts all over again. I want it to resume from where it stopped.
You need to store the data into some persistent storage method, such as cookies, the browsers localStorage, or write data out to an external data source (such as a database through an API). Otherwise the session data is lost between browser refreshes.
For example, if you wanted to use localStorage:
<script type="text/javascript">
// properties
var count = 0;
var counter = null;
window.onload = function() {
initCounter();
};
function initCounter() {
// get count from localStorage, or set to initial value of 1000
count = getLocalStorage('count') || 1000;
counter = setInterval(timer, 1000); //1000 will run it every 1 second
}
function setLocalStorage(key, val) {
if (window.localStorage) {
window.localStorage.setItem(key, val);
}
return val;
}
function getLocalStorage(key) {
return window.localStorage ? window.localStorage.getItem(key) : '';
}
function timer() {
count = setLocalStorage('count', count - 1);
if (count == -1) {
clearInterval(counter);
return;
}
var seconds = count % 60;
var minutes = Math.floor(count / 60);
var hours = Math.floor(minutes / 60);
minutes %= 60;
hours %= 60;
document.getElementById("timer").innerHTML = hours + "hours " + minutes + "minutes and " + seconds + " seconds left to complete this transaction"; // watch for spelling
}
</script>
<div id="timer"></div>
You can try it out here: https://jsfiddle.net/rcg4mt9x/
i want this my javascript code to to be able to be reading 3 hours countdown and also redirect to a new page after the countdown is complete
<script type="text/javascript">
// properties
var count = 0;
var counter = null;
window.onload = function() {
initCounter();
};
function initCounter() {
// get count from localStorage, or set to initial value of 1000
count = getLocalStorage('count') || 1000;
counter = setInterval(timer, 1000); //1000 will run it every 1 second
}
function setLocalStorage(key, val) {
if (window.localStorage) {
window.localStorage.setItem(key, val);
}
return val;
}
function getLocalStorage(key) {
return window.localStorage ? window.localStorage.getItem(key) : '';
}
function timer() {
count = setLocalStorage('count', count - 1);
if (count == -1) {
clearInterval(counter);
return;
}
var seconds = count % 60;
var minutes = Math.floor(count / 60);
var hours = Math.floor(minutes / 60);
minutes %= 60;
hours %= 60;
document.getElementById("timer").innerHTML = hours + "hours " + minutes + "minutes and " + seconds + " seconds left to complete this transaction"; // watch for spelling
}
</script>
<div id="timer"></div>
please help me make it better by making it been able to countdown to three hour and also redirect to another page after the countdown is complete
You didn't properly set total time. You set it to 16 minutes instead of 3 hours. Here is the working code (try it on JSFiddle):
var time = 60 * 60 * 3;
var div = document.getElementById("timer");
var t = Date.now();
var loop = function(){
var dt = (Date.now() - t) * 1e-3;
if(dt > time){
doWhateverHere();
}else{
dt = time - dt;
div.innerHTML = `Hours: ${dt / 3600 | 0}, Minutes: ${dt / 60 % 60 | 0}, Seconds: ${dt % 60 | 0}`;
}
requestAnimationFrame(loop);
};
loop();
Also, do not use setInterval and setTimeout for precise timing. These functions are volatile. Use Date.now() instead.
I have borrowed some JS code to help me create a timer for 65 seconds. My JS knowledge is basic but I managed to modify the script to work the way I want it to. However when I click on the play button the timer speeds up from the second round onwards.
HTML:
<div id="rightCol">
<span id="countdown" class="timer">Timer About to Start! </span>
<div>
<input type="button" value="Play" id="play">
</div>
</div>
JS:
var seconds = 65;
function secondPassed() {
var minutes = Math.round((seconds - 30)/60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = "0" + remainingSeconds;
}
document.getElementById('countdown').innerHTML = minutes + ":" + remainingSeconds;
if (seconds == 0) {
clearInterval(countdownTimer);
document.getElementById('countdown').innerHTML = "Time's Up!";
document.getElementById("passage_text").disabled = true;
} else {
seconds--;
}
}
var countdownTimer = setInterval('secondPassed()', 1000);
$("#play").click(function(){
seconds = 65;
var countdownTimer = setInterval('secondPassed()', 1000);
$('#passage_text').attr('disabled', false).focus();
$("#passage_text").val('');
});
I read some of the other answers similar to mine Count down timer speeds up but I don't fully understand how the secondPassed() function works to fix it.
You need to clear interval on play functionality too and make countdownTimer global. Also it's better to pass function handler to setInterval instead of string as this will work as eval function and not recommended
var seconds = 65;
var countdownTimer = null; // make it global
function secondPassed() {
var minutes = Math.round((seconds - 30)/60);
var remainingSeconds = seconds % 60;
if (remainingSeconds < 10) {
remainingSeconds = "0" + remainingSeconds;
}
document.getElementById('countdown').innerHTML = minutes + ":" + remainingSeconds;
if (seconds == 0) {
clearInterval(countdownTimer);
document.getElementById('countdown').innerHTML = "Time's Up!";
document.getElementById("passage_text").disabled = true;
} else {
seconds--;
}
}
countdownTimer = setInterval(secondPassed, 1000); // removed var and passing handler instead of string.
$("#play").click(function(){
seconds = 65;
clearInterval(countdownTimer); // clear interval
countdownTimer = setInterval(secondPassed, 1000); // removed var to use global countdownTimer variable
$('#passage_text').attr('disabled', false).focus();
$("#passage_text").val('');
});
See my JS comments above