I have a program which I wrote with html just like a website but runs offline so I want to add 35 minutes countdown after the user have logged in then when the 35 minutes is exusted the user will be logged out
But I can't get the code right because I am new to javascript but I was able to get it to count for 60seconds and after that it will alert the user with "logout" but I want it to log the user out not to alert the user to logout
This is the html code
<div id="counter">1:00</div>
And this is the javascript code
function countdown() {
var seconds = 60;
function tick() {
var counter = document.getElementById("counter");
seconds--;
counter.innerHTML = "0:" + (seconds < 10 ? "0" : "") + String(seconds);
if( seconds > 0 ) {
setTimeout(tick, 1000);
} else {
alert("Game over");
}
}
tick();
}
countdown();
<script>
// Set the date we're counting down to
var countDownDate = new Date("July 12, 2017 09:00:00").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get todays date and time
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="counter"
document.getElementById("counter").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is over, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("counter").innerHTML = "EXPIRED";
}
}, 1000); // time changes in every 1 second
</script>
<p2>to go</p2>
try this out, change date and time according to your need
Handling sessions in the frontend is not the best way to approach this, but since you asked...
Your method seems correct, I mean you just have to change 60 seconds with 2100 (for 35 minutes) seconds. To logout you'd need a function or a page to log them out.
The problem with this method is that if they refresh the page the counter also refreshes, also they can directly change the javascript if they want, rewrite the function and so many other things...
Luckily for you Javascript now supports something called session storage and local storage, so you can store your timer in one of these variables and even if they refresh the page you don't lose their latest value. Session variables last for as long as the browser is open, local variables last until forever, or if until you unset them.
You can set storage values like this:
var latestTime = localStorage.getItem('secondsPassed');
localStorage.setItem('secondsPassed', lastTime+1);
This will at least get around them refreshing the page and closing-reopening the browser to refresh the timer!
If you want to learn how to handle sessions properly read into PHP since the backend is the best way to handle these kind of things.
function countdown() {
var timeoutMinutes = 35;
var startTime = new Date();
var elapsedSecond = 0;
function tick() {
var counter = document.getElementById("counter");
var currentTime = new Date();
elapsedSecond = (currentTime - startTime) / 1000;
counter.innerHTML = formatPlaces("0") + ":"
+ formatPlaces(elapsedSecond / 60) + ":"
+ formatPlaces(elapsedSecond % 60);
if (elapsedSecond <= timeoutMinutes * 60) {
setTimeout(tick, 1000);
} else {
alert("Game over");
}
}
tick();
}
function formatPlaces(value) {
var intValue = parseInt(value);
return intValue.toString().length == 1 ? "0" + intValue.toString() : intValue.toString();
}
countdown();
<div id="counter">00:00</div>
Related
I’ve seen several examples for Javascript/jQuery countdown timers. I have implemented a 15 minute countdown timer based off the example at w3schools. However, I would like to add an update feature that allows me to add/subtract time to and from the clock. The timer starts at 15 minutes.
In my project the user will answers questions. After they answer the question and select submit, a time penalty or bonus is given. The penalty subtracts 3 seconds from the clock. The bonus adds 2 seconds to it. Below is an example of my code:
var mission_timer = 15;
function start_timer(){
countDownDate = new Date().getTime() + mission_timer * 60 * 1000;
timer_interval = setInterval(function() {
var now = new Date().getTime();
var distance = countDownDate - now;
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var minutes_number_length = Number(String(minutes).length);
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
var seconds_number_length = Number(String(seconds).length);
current_time = document.getElementById("game_timer").innerHTML = "TIME: " + minutes + ":" + seconds;
update_timer = null;
time_update = 0;
if (current_time === "TIME: 00:00") {
$("#game_timer").css("color", "red");
clearInterval(timer_interval);
console.log("Time Expired");
}else
if (current_time === "TIME: 01:00") {
$("#game_timer").css("color", "yellow");
console.log("One Minute Left");
}
}, 1000);
}
The counter works using countDownDate and now. You have to modify the countDownDate variable to add/substract time when user answers the questions.
//bonus for correct answer
countDownDate += 2 * 1000;
And
//penalty for wrong answer
countDownDate -= 3 * 1000;
Both of them have to be triggered by the Submit event of the question answered.
I've got this timer for my game, and it works really well, but I want to develop it further by doing two things.
Add a sound for the last 10 seconds (a subtle beep every second)
Add a red background for the div that pulses each second for the last 10 seconds
I have tried to google about adding sound, but I can't really figure out how to do it. As for the div background I found a library called pulsate but it adds a border around the div, and what I really want is the background to flash, but I don't know how to do it manually.
I'm using the jquery.countdown cdn, as seen below. This is currently my jQuery for the countdown:
<script src="{% static 'js/jquery.countdown.min.js' %}"></script>
<script>
$(function timer() {
let currentDate = new Date();
let remainingTimeoutSeconds = {{ view.remaining_timeout_seconds|json }};
let milliseconds = Math.floor(remainingTimeoutSeconds * 1000);
$('.time-left').countdown(currentDate.valueOf() + milliseconds)
.on('update.countdown', function (event) {
// %-N is "Total count of minutes till the end, non-padded"
// %S is seconds left
let format = '%-N:%S';
$(this).html(event.strftime(format));
})
.on('finish.countdown', function (event) {
$('<input>').attr({
type: 'hidden',
name: 'timeout_happened',
value: '1'
}).appendTo('form');
$('#form').submit();
});
});
</script>
The last bit of code, on finish, simply submits the form with the values at the end of the timer. Less relevant to this problem.
function beep() {
(new
Audio(
"data:audio/wav;base64,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 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////VEFHAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAU291bmRib3kuZGUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMjAwNGh0dHA6Ly93d3cuc291bmRib3kuZGUAAAAAAAAAACU="
)).play();
}
call the above function at the end
I am tested the bellow code is woking .But before complete the time onece click on the page for taking focous on the page
<html>
<p id="demo"></p>
<script>
function beep() {
(new
Audio(
"data:audio/wav;base64,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 /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////VEFHAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAU291bmRib3kuZGUAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAMjAwNGh0dHA6Ly93d3cuc291bmRib3kuZGUAAAAAAAAAACU="
)).play();
}
// Set the date we're counting down to
//var countDownDate = new Date("Jan 5, 2021 15:37:25").getTime();
var countDownDate = new Date();
countDownDate.setSeconds( countDownDate.getSeconds() + 10 );
// Update the count down every 1 second
var x = setInterval(function() {
// Get today's date and time
var now = new Date().getTime();
// Find the distance between now and the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Display the result in the element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is finished, write some text
if (distance < 0) {
clearInterval(x);
beep();
document.getElementById("demo").innerHTML = "EXPIRED";
}
}, 1000);
</script>
</html>
I'm a complete noob to JS trying to use it for the first time for a school project.
My goal is to have a timer that counts down upon pressing a button. The countdownClock function is then called with the Unix time 10 minutes in the future as a parameter. My code seems to work decently well but upon pressing the button again, it creates a weird alternating glitch where both timers are functioning simultaneously.
What can I do to forget about the previous timer upon repressing the button? Thank you!
function countdownClock(time){
// Set the date we're counting down to
var countDownDate = (time + "000");
// Update the count down every 1 second
var x = setInterval(function() {
// Get today's date and time
var now = new Date().getTime();
// Find the distance between now and the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("timer").innerHTML = minutes + "m " + seconds + "s ";
// If the count down is over, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("timer").innerHTML = "GAME OVER";
}
}, 1000);
}
I'm guessing you copied this from somewhere, since it already has what you need - clearInterval would give you the result you are looking for, and you should only need minimal changes
var intervalId;
function countdownClock(time){
// Set the date we're counting down to
var countDownDate = (time + "000");
// clear the old one, if relevant
if (intervalId)
clearInterval(intervalId)
intervalId = setInterval(function() {
// Get today's date and time
var now = new Date().getTime();
// Find the distance between now and the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("timer").innerHTML = minutes + "m " + seconds + "s ";
// If the count down is over, write some text
if (distance < 0) {
clearInterval(intervalId);
document.getElementById("timer").innerHTML = "GAME OVER";
}
}, 1000);
}
I'm working on a countdown date script. However, the environment I'm working in does not refresh the page on submission, so I'm having an issue with multiple intervals being created. I believe if there was a way to check if there is an interval running, then to clear it and create a new one. But I'm not sure of how to do this. Of course, if there is a better strategy than how I currently have my code set up, then feel free to provide that as well.
My Code:
//get ready for a-togglin'
var finishedMessage = document.getElementById('finshedMessage');
//get dates value
var dateValue = document.getElementById('dateInput').innerText;
var dateEntered = new Date(dateValue);
//set the date we're counting down too
var targetDate = new Date(dateEntered).getTime();
//Update the countdown every second
var countInterval = setInterval(function() {
var now = new Date().getTime();
//get time remaining from now
var timeRemaining = targetDate - now;
//time calculations : days, hours, minutes and seconds
var days = Math.floor(timeRemaining / (1000 * 60 * 60 * 24));
var hours = Math.floor((timeRemaining % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((timeRemaining % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((timeRemaining % (1000 * 60)) / 1000);
//When the countdown is finished, report back completion text
if (timeRemaining <= 0 || NaN) {
finishedMessage.style.display = "inline-block";
clearInterval(countInterval);
} else {
//if day is over a year count the years remaining if no years just count days
if (days > 365) {
var years = Math.floor(days / 365);
days = days % 365;
document.getElementById("report").innerHTML = years + "Y " + days + "D " + hours + "H " + minutes + "M " + seconds + "s ";
} else {
//report the remaining time to report div
document.getElementById("report").innerHTML = days + "D " + hours + "H " + minutes + "M " + seconds + "s ";
}
}
}, 1000);
I'm afraid there's not how to clear all intervals declared without having the value returned from them. But you can save the reference to the global window object when running it for the first time, so you can reset it whenever you want:
if (window.countInterval) clearInterval(window.countInterval)
window.countInterval = setInterval(function () {
/* your code here */
})
It is not an error to call clearInterval for interval id already stopped. So you can do just
clearInterval(intervalId);
intervalId = setInterval(.....);
Here are my code on my current program. I have a running code for countdown timer my problem now is when the VOTING PERIOD ENDS I want to display Voting Ends instead of it always displaying voting open.
<script>
// Set the date we're counting down to
var countDownDate = new Date("<?php echo $countdown['datestart']; ?>").getTime();
var endDate = new date("<?php echo $countdown['dateend']; ?>").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get todays date and time
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
// If the count down is over, write some text
if (distance < 0) {
clearInterval(x);
document.getElementById("demo").innerHTML = "Voting now Opens";
}
// If date end is over display some text
//display voting period ends
}, 1000);
</script>
At a glance, i can see that your "endDate" line has an error:
var endDate = new date(.....
it should be Date with a capital 'D' as is for the var countDownDate i.e.
var endDate = new Date(.....
Assuming the rest of the code is correct (and it seems ok) - should be fine.
If that doesn't solve it - from your question it is easy to decipher that the if the following function always resolves to false and hence will never fire enclosed code which clears the 'x' interval and shows that voting is open.
if (distance < 0) {...}
If what I would do is console.log(countDownDate);, console.log(now); and why not also console.log(distance); ideally immidiately after the declaration:
// Find the distance between now an the count down date
var distance = countDownDate - now;
if you are unsure how to use the console.log() function please refer to the following link: https://developers.google.com/web/tools/chrome-devtools/console/
To add the end voting message, you will need to continue the interval until the voting has ended. To make things a little simpler, we have split the code into 3 sections using if...else if...else. In each of these, we handle the respective display for that scenario. It has the added benefit of not doing calculations when it is not needed.
If distance > 0, the voting has not started.
If endDate > now, the voting hasn't ended. I am assuming that the PHP output will result in an accurate date for this scenario. Read more.
Any other scenario means voting has ended.
<script>
// Set the date we're counting down to
var countDownDate = new Date("<?php echo $countdown['datestart']; ?>").getTime();
var endDate = new Date("<?php echo $countdown['dateend']; ?>").getTime();
// Update the count down every 1 second
var x = setInterval(function() {
// Get todays date and time
var now = new Date().getTime();
// Find the distance between now an the count down date
var distance = countDownDate - now;
if (distance > 0) {
// Time calculations for days, hours, minutes and seconds
var days = Math.floor(distance / (1000 * 60 * 60 * 24));
var hours = Math.floor((distance % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
var minutes = Math.floor((distance % (1000 * 60 * 60)) / (1000 * 60));
var seconds = Math.floor((distance % (1000 * 60)) / 1000);
// Output the result in an element with id="demo"
document.getElementById("demo").innerHTML = days + "d " + hours + "h "
+ minutes + "m " + seconds + "s ";
}
else if (endDate > now) {
// If the count down is over, write some text
document.getElementById("demo").innerHTML = "Voting now Opens";
}
else {
// If date end is over display some text
//display voting period ends
document.getElementById("demo").innerHTML = "Voting Ended";
clearInterval(x);
}
}, 1000);
</script>