I have my DOM like this :
<input type="number" id="input" value="" placeholder="Enter time in minutes">
<button id="button">Go</button>
<button id="reset">reset</button>
<div class="timer">
<div class="mint" id="mint"></div>
<div class="sec" id="sec"></div>
</div>
And my JavaScript Like this :
let currentTime = 0;
let intervalClear;
let input = document.getElementById('input');
let button = document.getElementById('button')
button.addEventListener('click', ()=>{
let value = input.value * 60000;
function getTime(){
currentTime++
function backcount(currentTime){
let output = value - currentTime
console.log(output);
const mint = document.getElementById('mint'),
sec = document.getElementById('sec');
let minute = Math.floor(output/60000)
let second = ((output % 60000) / 1000).toFixed(0)
mint.innerText = minute;
sec.innerText = second;
if(output == 0){
clearInterval(intervalClear)
}
}
backcount(currentTime);
}
getTime()
intervalClear = setInterval(getTime, 1000)
})
const reset = document.getElementById('reset')
reset.addEventListener('click', ()=>{
clearInterval(intervalClear);
input.value = '';
})
now I want to display value in my web page But it doesn't updating. seems like its freezes. but my "setInterval()" running properly.
How can I resolve this issue? need help!
You need instead of this code
let output = value - currentTime
use this
let output = value - (currentTime * 1000)
let currentTime = 0;
let intervalClear;
let input = document.getElementById('input');
let button = document.getElementById('button')
button.addEventListener('click', ()=>{
let value = input.value * 60000;
function getTime(){
currentTime++
function backcount(currentTime){
let output = value - (currentTime * 1000)
console.log(output);
const mint = document.getElementById('mint'),
sec = document.getElementById('sec');
let minute = Math.floor(output/60000)
let second = ((output % 60000) / 1000).toFixed(0)
mint.innerText = minute;
sec.innerText = second;
if(output == 0){
clearInterval(intervalClear)
}
}
backcount(currentTime);
}
getTime()
intervalClear = setInterval(getTime, 1000)
})
const reset = document.getElementById('reset')
reset.addEventListener('click', ()=>{
clearInterval(intervalClear);
input.value = '';
})
<input type="number" id="input" value="" placeholder="Enter time in minutes">
<button id="button">Go</button>
<button id="reset">reset</button>
<div class="timer">
<div class="mint" id="mint"></div>
<div class="sec" id="sec"></div>
</div>
Based on #Oleg Barabanov's answer I found one bug. If you didn't enter any value in text box or first added value then click on "Reset" and click on "Go" button then counter started with negative value. I fixed that issue with this code.
Script
var intervalClear;
var input = document.querySelector('#input');
var mint = document.querySelector('#mint');
var sec = document.querySelector('#sec');
var go_button = document.querySelector('#button');
var reset_button = document.querySelector('#reset');
go_button?.addEventListener('click', () => {
if (input.value != '' && input.value != 0 && parseInt(input.value) != NaN) {
startTimer(input.value, mint, sec);
}
});
reset_button?.addEventListener('click', () => {
clearInterval(intervalClear);
mint.textContent = '00';
sec.textContent = '00';
});
function startTimer(duration, minElement, secElement) {
clearInterval(intervalClear);
var timer = duration * 60, minutes, seconds;
intervalClear = setInterval(function () {
minutes = parseInt(timer / 60, 10);
seconds = parseInt(timer % 60, 10);
minutes = minutes < 10 ? "0" + minutes : minutes;
seconds = seconds < 10 ? "0" + seconds : seconds;
minElement.textContent = minutes;
secElement.textContent = seconds;
if (--timer < 0) {
timer = duration;
}
if (minutes == 0 && seconds == 0) {
clearInterval(intervalClear);
mint.textContent = '00';
sec.textContent = '00';
}
}, 1000);
}
DOM
<input type="number" id="input" placeholder="Enter time in minutes" >
<button id="button">Go</button>
<button id="reset">reset</button>
<div class="timer">
<div class="mint" id="mint">00</div>
<div class="sec" id="sec">00</div>
</div>
Related
I'm trying to prevent my laps from counting the same second. So I'm trying to take the current value and evaluate it as != not equal to the previous value before appending it.
Here is the function, and my HTML. Not sure if I can do anything with the ids I set up. I have jquery set up to run in my javascript, so if you have any ideas with that I would be open to listening. There are a couple of things that probably don't have a use that I have not removed yet.
Javascript Function
let seconds = 0;
let minutes = null;
let hours = null;
let startTimer = null;
let time = null;
let isRunning = (false);
let lapContainer = [];
let x;
let outputseconds;
let outputminutes;
let outputhours;
//connection to button
document.getElementById("start").addEventListener("click", start);
document.getElementById("stop").addEventListener("click", stop);
document.getElementById("reset").addEventListener("click", reset);
document.getElementById("lap").addEventListener("click", lap);
document.getElementById("resetLaps").addEventListener("click", resetLaps);
//functions
function start() {
if (isRunning === false) {
isRunning = true;
//interval
startTimer = setInterval(function () {
seconds++;
if (seconds <= 9) {
outputseconds = "0" + seconds;
document.getElementById("seconds").innerHTML = outputseconds;
} else if (seconds <= 60) {
outputseconds = seconds;
document.getElementById("seconds").innerHTML = outputseconds;
} else if (seconds >= 60) {
minutes++;
outputseconds = "00";
outputminutes = "0" + minutes;
document.getElementById("seconds").innerHTML = outputseconds;
document.getElementById("minutes").innerHTML = outputminutes;
seconds = 0;
} else if (minutes >= 9) {
outputminutes = minutes;
document.getElementById("minutes").innerHTML = outputminutes;
} else if (minutes >= 60) {
hours++;
outputminutes = "00";
outputhours = "0" + hours;
document.getElementById("minutes").innerHTML = outputminutes;
document.getElementById("hours").innerHTML = outputhours;
minutes = 0;
} else if (hours > 9) {
outputhours = hours;
document.getElementById("hours").innerHTML = outputhours;
}
}, 1000); //end of interval
} // end of if check
// should this be seperated out as a function???
let startTime = "00";
if (outputseconds > 0) {
if (outputminutes > 0) {
if (outputhours > 0) {
return outputhours + ":" + outputminutes + ":" + outputseconds;
} else {
return startTime + ":" + outputminutes + ":" + outputseconds;
} // hours
} else {
return startTime + ":" + startTime + ":" + outputseconds;
} //minutes
} else {
return startTime + ":" + startTime + ":" + startTime;
} // end of nested if seconds
} //end of start function
function stop() {
clearInterval(startTimer);
isRunning = false;
}
function reset() {
clearInterval(startTimer);
document.getElementById("seconds").innerHTML = "00";
document.getElementById("minutes").innerHTML = "00";
document.getElementById("hours").innerHTML = "00";
seconds = 0;
minutes = 0;
hours = 0;
isRunning = false;
}
function lap() {
if (isRunning === true) {
//initialize time
let lapTime = start();
//create connection to div
lapContainer = document.getElementById("lapContainer");
// how to check if they equal each other
//create element
const para = document.createElement("p");
//how many laps have been created
let i = document.getElementById("lapContainer").childElementCount;
let index = [i];
//create an index that will add an id to paragraph
para.id = index;
//add the lap to text
para.innerText = lapTime;
let laps = [];
laps = document.getElementById("lapContainer").childNodes[1].textContent;
let lastItem = laps[laps.length - 1];
let currentItem = laps[laps.length];
document.getElementById("test").innerHTML = laps;
if (currentItem !== lastItem) {
lapContainer.appendChild(para);
}
}
}
function resetLaps() {
$(lapContainer).empty();
isRunning = false;
}
HTML
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<title>Stopwatch</title>
<meta name="description" content="A simple stopwatch application" />
<meta name="author" content="****" />
<link rel="icon" href="/favicon.ico" />
<link rel="icon" href="/favicon.svg" type="image/svg+xml" />
<link rel="apple-touch-icon" href="/apple-touch-icon.png" />
<link rel="stylesheet" href="./css/styles.css" />
</head>
<body>
<!-- your content here... -->
<div class="menu">
Timer
Alarm
</div>
<div class="stopwatch-container">
<div class="stopwatch-wrapper">
<div class="stopwatch-button-container">
<button type="button" id="start">START</button>
<button type="button" id="stop">STOP</button>
<button type="button" id="reset">RESET</button>
<button type="button" id="lap">LAP</button>
<button type="button" id="resetLaps">RESET LAPS</button>
</div>
<div class="rectangle-container">
<div class="rectangle">
<p id="textWrapper">
<span id="hours">00</span>:<span id="minutes">00</span>:<span
id="seconds"
>00</span
>
</p>
</div>
</div>
</div>
</div>
<div class="lineBreak"></div>
<div id="lapContainer" class="lap-container"></div>
<p id="test"></p>
<script src="./scripts/scripts.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
</body>
</html>
Few things you might need to do:
1.When you set the laps array you need to get the array of texts of the all nodes, not just a text of the first node:
//laps = document.getElementById("lapContainer").childNodes[1].textContent;
laps = Array.from(document.getElementById("lapContainer").childNodes).map(node => node.textContent);
2.When you set currentItem you can not use laps[laps.length] because your new value not in the array yet and so it will return undefined. Instead you can just use your lapTime value:
let lastItem = laps[laps.length - 1];
//let currentItem = laps[laps.length];
let currentItem = lapTime;
Example:
let isRunning = Boolean(true);
let lapContainer = [];
document.querySelector('#lap').addEventListener('click', () => lap());
function lap() {
if (isRunning === true) {
//initialize time
let lapTime = start();
//create connection to div
lapContainer = document.getElementById("lapContainer");
// how to check if they equal each other
//create element
const para = document.createElement("p");
//how many laps have been created
let i = document.getElementById("lapContainer").childElementCount;
let index = [i];
//create an index that will add an id to paragraph
para.id = index;
//add the lap to text
para.innerText = lapTime;
let laps = [];
//laps = document.getElementById("lapContainer").childNodes[1].textContent;
laps = Array.from(document.getElementById("lapContainer").childNodes).map(node => node.textContent);
let lastItem = laps[laps.length - 1];
//let currentItem = laps[laps.length];
let currentItem = lapTime;
document.getElementById("test").innerHTML = laps;
if (currentItem !== lastItem) {
lapContainer.appendChild(para);
}
}
}
const start = () => new Date().toString();
<body>
<!-- your content here... -->
<div class="menu">
Timer
Alarm
</div>
<div class="stopwatch-container">
<div class="stopwatch-wrapper">
<div class="stopwatch-button-container">
<button type="button" id="start">START</button>
<button type="button" id="stop">STOP</button>
<button type="button" id="reset">RESET</button>
<button type="button" id="lap">LAP</button>
<button type="button" id="resetLaps">RESET LAPS</button>
</div>
<div class="rectangle-container">
<div class="rectangle">
<p id="textWrapper">
<span id="hours">00</span>:<span id="minutes">00</span>:<span
id="seconds"
>00</span
>
</p>
</div>
</div>
</div>
</div>
<div class="lineBreak"></div>
<div id="lapContainer" class="lap-container"></div>
<p id="test"></p>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.6.0/jquery.min.js"></script>
</body>
I have this javascript stopwatch that is working. The function is when user click start button to start and pause button to pause the stopwatch. The variable stopwatch is saved in localStorage and when user refresh the website and click start again the stopwatch continue from the last stopwatch time + 1; The first timer is working, but I will have an array of the same containers, fetching from a Database containing stopwatch time. The problem is with my loop. How can I add the timer for each individual timer container and continue from the time it was last saved + 1 and continue from there. I am providing an example maybe someone can help me.
HTML
<div class="c-add-task-main-container">
<h2 class="c-add-task-title">Time Tracker</h2>
<button class="start">Start</button>
<button class="pause">Pause</button>
<button class="clear">Clear</button>
<div class="output">00:34:21</div>
</div>
<div class="c-add-task-main-container">
<h2 class="c-add-task-title">Time Tracker</h2>
<button class="start">Start</button>
<button class="pause">Pause</button>
<button class="clear">Clear</button>
<div class="output">21:56:22</div>
</div>
<div class="c-add-task-main-container">
<h2 class="c-add-task-title">Time Tracker</h2>
<button class="start">Start</button>
<button class="pause">Pause</button>
<button class="clear">Clear</button>
<div class="output">32:47:35</div>
</div>
<div class="c-add-task-main-container">
<h2 class="c-add-task-title">Time Tracker</h2>
<button class="start">Start</button>
<button class="pause">Pause</button>
<button class="clear">Clear</button>
<div class="output">11:29:03</div>
</div>
<div class="c-add-task-main-container">
<h2 class="c-add-task-title">Time Tracker</h2>
<button class="start">Start</button>
<button class="pause">Pause</button>
<button class="clear">Clear</button>
<div class="output">04:01:14</div>
</div>
JS
let showTime = document.querySelector(".output");
let startTimeButton = document.querySelector(".start")
let pauseTimeButton = document.querySelector(".pause")
let seconds = 0;
let interval = null;
if (localStorage.getItem("stopwatchSeconds") != null) {
seconds = parseInt(localStorage.getItem("stopwatchSeconds"));
}
const timer = () => {
seconds++;
localStorage.setItem("stopwatchSeconds", seconds);
// Get hours
let hours = Math.floor(seconds / 3600);
// Get minutes
let minutes = Math.floor((seconds - hours * 3600) / 60);
// Get seconds
let secs = Math.floor(seconds % 60);
if (hours < 10) {
hours = `0${hours}`;
}
if (minutes < 10) {
minutes = `0${minutes}`;
}
if (secs < 10) {
secs = `0${secs}`;
}
showTime.innerHTML = `${hours}:${minutes}:${secs}`;
};
startTimeButton.addEventListener("click", () => {
pauseTimeButton.style.display = "block";
startTimeButton.style.display = "none";
console.log("START TIME CLICKED");
if (interval) {
return;
}
interval = setInterval(timer, 1000);
});
// Pause function
pauseTimeButton.addEventListener("click", () => {
pauseTimeButton.style.display = "none";
startTimeButton.style.display = "block";
console.log("PAUSE TIME CLICKED");
clearInterval(interval);
interval = null;
});
You can try this snippet
Html
<div class="c-add-task-main-container" data-watch_no="01">
<h2 class="c-add-task-title">Time Tracker 01</h2>
<button class="start">Start</button>
<button class="pause">Pause</button>
<button class="clear">Clear</button>
<div class="output"></div>
</div>
<div class="c-add-task-main-container" data-watch_no="02">
<h2 class="c-add-task-title">Time Tracker 02</h2>
<button class="start">Start</button>
<button class="pause">Pause</button>
<button class="clear">Clear</button>
<div class="output"></div>
</div>
Vanilla JS
let stop_watch_containers = document.querySelectorAll(".c-add-task-main-container");
stop_watch_containers.forEach((container) => {
let start_button = container.querySelector(".start");
let pause_button = container.querySelector(".pause");
let clear_button = container.querySelector(".clear");
let output = container.querySelector(".output");
let localStorageKey = "watch" + container.dataset.watch_no;
let seconds = localStorage.getItem(localStorageKey);
if (isNaN(seconds)) {
seconds = 0;
}
// set old time on page load
output.innerHTML = timer();
let interval;
// start watch
start_button.addEventListener("click", function () {
clearInterval(interval);
interval = setInterval(function () {
output.innerHTML = timer();
seconds++;
}, 1000);
});
// pause watch
pause_button.addEventListener("click", function () {
clearInterval(interval);
localStorage.setItem(localStorageKey, seconds);
});
// clear watch
clear_button.addEventListener("click", function () {
clearInterval(interval);
seconds = 0;
output.innerHTML = timer();
localStorage.setItem(localStorageKey, 0);
});
function timer() {
let hours = Math.floor(seconds / 3600);
// Get minutes
let minutes = Math.floor((seconds - hours * 3600) / 60);
// Get seconds
let secs = Math.floor(seconds % 60);
if (hours < 10) {
hours = `0${hours}`;
}
if (minutes < 10) {
minutes = `0${minutes}`;
}
if (secs < 10) {
secs = `0${secs}`;
}
return `${hours}:${minutes}:${secs}`;
}
});
Save the interval and timer in array let seconds = [] and I simplified your code, Start and Pause button are merged, if (time < 10) change with .padStart()
run on jsFiddle
let startTimeButtons = document.querySelectorAll(".start")
let seconds = [0, 0];
let interval = [];
if (localStorage.getItem("stopwatchSeconds") != null) {
seconds = JSON.parse(localStorage.getItem("stopwatchSeconds"));
seconds = seconds.map(n => parseInt(n))
}
const timer = (el, i) => {
seconds[i]++;
localStorage.setItem("stopwatchSeconds", JSON.stringify(seconds));
// Get hours
let hours = Math.floor(seconds[i] / 3600).toString().padStart(2, 0);
// Get minutes
let minutes = Math.floor((seconds[i] - hours * 3600) / 60).toString().padStart(2, 0);
// Get seconds
let secs = Math.floor(seconds[i] % 60).toString().padStart(2, 0);
el.parentElement.querySelector('.output').innerHTML = `${hours}:${minutes}:${secs}`;
};
startTimeButtons.forEach((btn, index) => {
timer(btn, index); // update time on page load
btn.addEventListener("click", () => {
if (btn.textContent == 'Start') {
btn.textContent = 'Pause';
interval[index] = setInterval(timer, 1000, btn, index);
} else {
btn.textContent = 'Start';
clearInterval(interval[index]);
}
});
})
<div class="c-add-task-main-container">
<h2 class="c-add-task-title">Time Tracker</h2>
<button class="start">Start</button>
<button class="clear">Clear</button>
<div class="output">00:00:00</div>
</div>
<div class="c-add-task-main-container">
<h2 class="c-add-task-title">Time Tracker</h2>
<button class="start">Start</button>
<button class="clear">Clear</button>
<div class="output">00:00:00</div>
</div>
I want to write code for a counter which countdown from 4 hours in hour, minute and second components (3:59:59 ... 3:59:58 ..... 0:0:1 ... 0:0:0) in which the user can increment or decrement any of those components by using +/-icons. I wrote a code but I cannot make it? How can I complete it? In my code just increase/decrease icon works.
function increment() {
hour = parseInt(document.getElementsByName("hour")[0].value);
minute = parseInt(document.getElementsByName("minute")[0].value);
second = parseInt(document.getElementsByName("second")[0].value);
if (second + 1 == 61) {
minute = minute + 1;
if (minute == 61) {
hour = hour + 1;
if (hour == 3) {
hour = 0;
}
minute = 0;
}
second = 0;
} else {
second += 1;
}
document.getElementsByName("hour")[0].value = hour.toString();
document.getElementsByName("minute")[0].value = minute.toString();
document.getElementsByName("second")[0].value = second.toString();
}
function decrement() {
hour = parseInt(document.getElementsByName("hour")[0].value);
minute = parseInt(document.getElementsByName("minute")[0].value);
second = parseInt(document.getElementsByName("second")[0].value);
if (second - 1 <= 0) {
minute -= 1;
if (minute <= 0) {
hour -= 1;
if (hour <= 0) {
hour = 2;
minute = 60;
} else {
minute = 60;
}
}
second = 60;
} else {
second -= 1;
}
document.getElementsByName("hour")[0].value = hour.toString();
document.getElementsByName("minute")[0].value = minute.toString();
document.getElementsByName("second")[0].value = second.toString();
}
<html>
<body>
<table>
<tr>
<td>Hour</td>
<td>
<input type="text" name = "hour" placeholder = "HOUR" value="0"/>
</td>
<td>Minute</td>
<td>
<input type="text" name="minute" placeholder="MINUTE" value="0"/>
</td>
<td>Second</td>
<td>
<input type="text" name="second" placeholder="SECOND" value="0"/>
</td>
</tr>
<tr>
<td><br>
<input type="button" name="+" value="+" onclick= "return increment()"/>
</td>
<td><br>
<input type="button" name="-" value="-" onclick="return decrement()"/>
</td>
</tr>
</table>
</body>
</html>
Here is how i would go about it, first of all, you had the script execute before the body which caused problems since the elements you were trying to select didn't exist yet,
also, you're trying to do everything everywhere, but if you keep state, it is much more manageable
<script>
const maxTime = 4 * 60 * 60; // 4 hours in seconds
const hours = document.querySelector("[name='hour']");
const minutes = document.querySelector("[name='minute']");
const seconds = document.querySelector("[name='second']");
let remaining = maxTime;
let counter = setInterval(decrement, 1000);
function increment() {
remaining = Math.max(maxTime, remaining + 1);
display();
}
function decrement() {
remaining = Math.max(0, remaining - 1);
display();
}
function display() {
const time = new Date(remaining * 1000).toISOString();
hours.value = time.slice(11, 13);
minutes.value = time.slice(14, 16);
seconds.value = time.slice(17, 19);
}
</script>
You can use the setInterval function
This will call your decrement function every second
setInterval(decrement, 1000)
The first parameter is the function to be executed.
The second parameter indicates the number of milliseconds before execution.
i have no idea how to save and show out put next to stopwatch:
00:01:30 , 00:01:30 something like this.
its not important but can i make stopwatch to stop on some time like 45 min
i created a button "save" was playing whit code but i have no idea how to make it save output and show
i was trying to find in internet but could not find
I appreciate any help.
var ss = document.getElementsByClassName('stopwatch');
[].forEach.call(ss, function(s) {
var currentTimer = 0,
interval = 0,
lastUpdateTime = new Date().getTime(),
start = s.querySelector('button.start'),
stop = s.querySelector('button.stop'),
reset = s.querySelector('button.reset'),
mins = s.querySelector('span.minutes'),
secs = s.querySelector('span.seconds'),
cents = s.querySelector('span.centiseconds');
start.addEventListener('click', startTimer);
stop.addEventListener('click', stopTimer);
reset.addEventListener('click', resetTimer);
function pad(n) {
return ('00' + n).substr(-2);
}
function update() {
var now = new Date().getTime(),
dt = now - lastUpdateTime;
currentTimer += dt;
var time = new Date(currentTimer);
mins.innerHTML = pad(time.getMinutes());
secs.innerHTML = pad(time.getSeconds());
cents.innerHTML = pad(Math.floor(time.getMilliseconds() / 10));
lastUpdateTime = now;
}
function startTimer() {
if (!interval) {
lastUpdateTime = new Date().getTime();
interval = setInterval(update, 1);
}
}
function stopTimer() {
clearInterval(interval);
interval = 0;
}
function resetTimer() {
stopTimer();
currentTimer = 0;
mins.innerHTML = secs.innerHTML = cents.innerHTML = pad(0);
}
});
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>Stopwatch</title>
</head>
<body>
<h1>Stopwatch</h1>
<div class="stopwatch">
<div class="controls">
<button class="start">Start</button>
<button class="stop">Stop</button>
<button class="reset">Reset</button>
<button class="save">save</button>
</div>
<div class="display">
<span class="minutes">00</span>:<span class="seconds">00</span>:<span class="centiseconds">00</span>
</div>
</div>
<script src="stopwatch.js"></script>
</body>
</html>
if i correct understand - here is solution. You still need some validations on input fields, checks on current timer and ithers, but it's worked version if user takes into account all these nuances himself.
index.html
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>Stopwatch</title>
</head>
<body>
<h1>Stopwatch</h1>
<div class="stopwatch">
<div class="controls">
<button class="start">Start</button>
<button class="stop">Stop</button>
<button class="reset">Reset</button>
||stop on:
<input class="min" placeholder="min" type="text" style="width: 30px" />:
<input class="sec" placeholder="sec" type="text" style="width: 30px" />:
<input class="ms" placeholder="ms" type="text" style="width: 30px" />
<button class="save">save</button>
<div class="savedTimeBlock" style="display: none">
saved time:
<div style="display: inline-block" class="time"></div>
</div>
</div>
<div class="display">
<span class="minutes">00</span>:<span class="seconds">00</span>:<span
class="centiseconds"
>00</span
>
</div>
</div>
<script src="stopwatch.js"></script>
</body>
</html>
stopwatch.js
var ss = document.getElementsByClassName("stopwatch");
[].forEach.call(ss, function(s) {
var currentTimer = 0,
interval = 0,
lastUpdateTime = new Date().getTime(),
timeToStop = {
min:null,
sec:null,
ms:null
},
start = s.querySelector("button.start"),
stop = s.querySelector("button.stop"),
reset = s.querySelector("button.reset"),
mins = s.querySelector("span.minutes"),
secs = s.querySelector("span.seconds"),
cents = s.querySelector("span.centiseconds"),
minutes = s.querySelector(".min"),
seconds = s.querySelector(".sec"),
milliseconds = s.querySelector(".ms"),
savedTimeBlock = s.querySelector(".savedTimeBlock"),
time = s.querySelector(".time"),
save = s.querySelector(".save");
start.addEventListener("click", startTimer);
stop.addEventListener("click", stopTimer);
save.addEventListener("click", saveStopTime);
reset.addEventListener("click", resetTimer);
function pad(n) {
return ("00" + n).substr(-2);
}
function saveStopTime() {
let min = timeToStop.min = pad(+minutes.value),
sec = timeToStop.sec = pad(+seconds.value),
ms = timeToStop.ms = pad(+milliseconds.value);
if (+min || +sec || +ms) {
showSavedTimeBlock(min, sec, ms)
} else {
killSavedTimeBlock()
}
}
const showSavedTimeBlock = (min, sec, ms) => {
savedTimeBlock.style.display = 'inline-block';
time.innerText = `${min}:${sec}:${ms}:`
};
const killSavedTimeBlock = () => {
savedTimeBlock.style.display = 'none';
timeToStop.min = null;
timeToStop.sec = null;
timeToStop.ms = null;
time.innerText = ''
};
function update() {
var now = new Date().getTime(),
dt = now - lastUpdateTime;
currentTimer += dt;
var time = new Date(currentTimer);
let min = pad(time.getMinutes());
let sec = pad(time.getSeconds());
let ms = pad(Math.floor(time.getMilliseconds() / 10));
mins.innerHTML = min;
secs.innerHTML = sec;
cents.innerHTML = ms;
let ts = timeToStop;
if (ts.min === min && ts.sec === sec && ts.ms === ms) {
stopTimer()
} else {
lastUpdateTime = now;
}
}
function startTimer() {
if (!interval) {
lastUpdateTime = new Date().getTime();
interval = setInterval(update, 1);
}
}
function stopTimer() {
clearInterval(interval);
interval = 0;
}
function resetTimer() {
stopTimer();
killSavedTimeBlock()
currentTimer = 0;
mins.innerHTML = secs.innerHTML = cents.innerHTML = pad(0);
}
});
I need help,
How to put Stop and Reset button in html and javascript
Here my countdown javascript and html code and also put chrome notifications with sound,
sounds loop notify me left 10 Seconds after countdown then 0 notify me in chrome notification, and also show countdown value in page title
function do_countdown() {
var start_num = document.getElementById("value").value;
var unit_var = document.getElementById("countdown_unit").value;
start_num = start_num * parseInt(unit_var);
var countdown_output = document.getElementById('countdown_div');
if (start_num > 0) {
countdown_output.innerHTML = format_as_time(start_num);
var t=setTimeout("update_clock(\"countdown_div\", "+start_num+")", 1000);
}
return false;
}
function update_clock(countdown_div, new_value) {
var countdown_output = document.getElementById(countdown_div);
var new_value = new_value - 1;
if (new_value > 0) {
new_formatted_value = format_as_time(new_value);
countdown_output.innerHTML = new_formatted_value;
var t=setTimeout("update_clock(\"countdown_div\", "+new_value+")", 1000);
} else {
countdown_output.innerHTML = "Time's UP!";
}
}
function format_as_time(seconds) {
var minutes = parseInt(seconds/60);
var seconds = seconds - (minutes*60);
if (minutes < 10) {
minutes = "0"+minutes;
}
if (seconds < 10) {
seconds = "0"+seconds;
}
var return_var = minutes+':'+seconds;
return return_var;
}
And also html
<form id="countdown_form" onSubmit="return do_countdown();">
Countdown from: <input type="text" style="width: 30px" id="value" value="10" text-align="center"/>
<select id="countdown_unit">
<option value="1">Seconds</option>
<option value="60">Minutes</option>
<option value="3600">Hours</option>
</select>
<input type="submit" value="Start" />
<!--<input type="button" value="Reset" id="reset">-->
</form>
<div id="countdown_div"> </div>
javascript
changes
1.taken window variables t1,t2 where the timers are going to be assigned
2.added a button(name:reset),which on click calls doReset function
3.added doStuff function
window.t1=null;
window.t2=null;
function do_countdown() {
var start_num = document.getElementById("value").value;
var unit_var = document.getElementById("countdown_unit").value;
start_num = start_num * parseInt(unit_var);
var countdown_output = document.getElementById('countdown_div');
if (start_num > 0) {
countdown_output.innerHTML = format_as_time(start_num);
window.t1=setTimeout("update_clock(\"countdown_div\", "+start_num+")", 1000);
}
return false;
}
function update_clock(countdown_div, new_value) {
var countdown_output = document.getElementById(countdown_div);
var new_value = new_value - 1;
if (new_value > 0) {
new_formatted_value = format_as_time(new_value);
countdown_output.innerHTML = new_formatted_value;
window.t2=setTimeout("update_clock(\"countdown_div\", "+new_value+")", 1000);
} else {
countdown_output.innerHTML = "Time's UP!";
}
}
function format_as_time(seconds) {
var minutes = parseInt(seconds/60);
var seconds = seconds - (minutes*60);
if (minutes < 10) {
minutes = "0"+minutes;
}
if (seconds < 10) {
seconds = "0"+seconds;
}
var return_var = minutes+':'+seconds;
return return_var;
}
function doReset(){
window.clearTimeout(window.t1);
window.clearTimeout(window.t2);
document.getElementById('countdown_div').innerHTML="";
}
HTML
<form id="countdown_form" onSubmit="return do_countdown();">
Countdown from: <input type="text" style="width: 30px" id="value" value="10" text-align="center"/>
<select id="countdown_unit">
<option value="1">Seconds</option>
<option value="60">Minutes</option>
<option value="3600">Hours</option>
</select>
<input type="submit" value="Start" />
<input type="button" onClick="return doReset();" value="Reset" id="reset">
</form>
<div id="countdown_div"> </div>
Use the reset attribute in your form to clear the form input values
<input type="reset"value="Reset">
Take a look here http://jsfiddle.net/05y89wn3/14/
you have to clear the timeout ,reset the form and change the html value of the countdown_div
var reset = document.getElementById("reset_button");
var t;
reset.onclick = function() {
clearTimeout(t);
document.getElementById("countdown_form").reset();
document.getElementById("countdown_div").innerHTML="";
}