Multiple countdowns jQuery and organize them depending the time left - javascript

I want to create a website with multiple countdowns activated by a click, some of them have different time, others the same. I need to organize them depending the time left. When one finish I need to return it to his original countdown value, so you can click again.
To understand better (I don't need the effects, I made them only for the example): http://i.imgur.com/lvcwbqm.gif
I have this: http://jsfiddle.net/m19aojmu/
Each countdown works independently of the others.
HTML
<div class="element" id="el1"><b>Elm 1</b> <span class="timeout">10</span> segundos</div>
<div class="element" id="el2"><b>Elm 2</b> <span class="timeout">100</span> segundos</div>
<div class="element" id="el3"><b>Elm 3</b> <span class="timeout">5</span> segundos</div>
Javascript
function timer(selector) {
var self = $(selector);
var sec = parseInt(self.find('span.timeout').text());
var interval = setInterval(function() {
sec--;
if (sec >= 0) {
self.find('span.timeout').text(sec);
} else {
clearInterval(interval);
}
}, 1000);
}
$("body").on('click', '.element', function() {
timer(this);
});
While each countdown have a different id (el1, el2, el3 ...) I don't know to detect which of them finished, therefore I don't know how to add a class when it start and end.
About the ubication, what should I do? Different classes for each location with position absolute?
I know it's a lot, but some help will be great.
Thank you very much.

Agusitn you code its like 95% correct, but you are setting the .text() into the sec variable wich is 0 or -1
Lets change the code a little bit
First lets take the actual value of the span DOM Element.
var actualTime = $('span.timeout').html();
console.log("the actual value when click is " + actualTime)
Later on the if statement we check when the actual span text its equal to 0
else if($(this).find('span').text() <= 0) {
console.log(sec)
var text = self.find('span.timeout').text(actualTime);
console.log(actualTime)
clearInterval(interval);
}
and when the .text() its === to 0, we set the actualTime variable to get back to the actual time.
here is the JsFiddle

Related

setTimeout executes itself right away/on clear

I'm making a webpage where user events are logged in.
To test the feature I made a small, independant webpage with a teaxtarea and a text input. The events logged are those performed on the input element.
I want to prevent the same event text to be shown multiple times in a row, but I can't seem to prevent them from showing up!
I also want to add a line to separate event groups 0.5 seconds after no other event happened, but the line seems to appear on every event trigger, evenif I use clearTimeout with the timeout ID.
Basically: I don't want any line to be repeated. If the last line is a separator line, then it must not add another one. Yet it doesn't see to work.
JSFiddle Demo
Here is my code:
JavaScript
var timerID = 0;
function addSeparateLine()
{
document.getElementById('listeEvenements').value += "--------------------\n";
}
function show(newEventText)
{
var eventListField = document.getElementById('listeEvenements');
var eventList = [];
if (eventListField.value.length > 0)
{
eventList = eventListField.value.split("\n");
}
var eventCounter = eventList.length;
if (eventList[eventCounter - 2] == newEventText)
{
clearTimeout(timerID);
newEventText = "";
}
timerID = setTimeout(addSeparateLine, 500);
if (newEventText !== "")
{
eventListField.value += newEventText + "\n";
}
return true;
}
HTML
<fieldset id="conteneurLogEvenements">
<legend>Events called from HTML attribute</legend>
<textarea id="listeEvenements" rows="25"></textarea>
<input id="controleEcoute" type="text" onBlur="show('Blur');" onchange="show('Change');" onclick="show('Click');" onfocus="show('Focus');" onMousedown="show('MouseDown');" onMousemove="show('MouseMove');" onMouseover="show('MouseOver');" onkeydown="show('KeyDown');"
onkeypress="show('KeyPress');" onkeyup="show('KeyUp');" />
</fieldset>
http://jsfiddle.net/z6kb4/2/
It sounds like what you want is a line that prints after 500 milliseconds of inactivity, but what your code currently says to do is "print a line 500 milliseconds after any action, unless it gets canceled". You can get better results by structuring the code more closely to your intended goal.
Specifically, instead of scheduling a new timeout every time an event occurs, simply start a loop when the first event occurs that checks the time that has elapsed since the most recent event received and then prints a line when the elapsed time exceeds the desired threshold (500 milliseconds). Something like:
function addSeparateLine() {
var elapsed = new Date().getTime() - lastEventTime;
if (elapsed >= 500) {
document.getElementById('listeEvenements').value += "--------------------\n";
clearInterval(timerID);
timerID = -1;
}
}
...and then you schedule it like:
if(newEventText !== "") {
lastEventTime = new Date().getTime();
eventListField.value += newEventText+"\n";
if (timerID == -1) {
timerID = setInterval(addSeparateLine,100);
}
}
Working example here: http://jsfiddle.net/z6kb4/4/
Because you are not actually stopping the show function in any way. The clearTimeout only applies to the separator add. I have updated your fiddle. You need to wrap your function with
if (+new Date() - lastfire < 500) return;
and
lastfire = +new Date();
(before the last return--see the updated fiddle). Also, make sure to stick the global definition var lastfire = -1; somewhere up top.

jQuery getting tag's content dynamically

First of all, I know my question seems to be already asked many many times but I'm facing a weird issue.
Here's the situation :
I've got an integer (dynamically loaded) in this tag :
<i id="my_id">{{here's my integer}}</i>
What I want to do is to retrieve the integer inside my tag but this integer is set to 0 at first (When the page isn't fully loaded") and then 2 or 3 seconds later, this integer is set to its real value.
So I tried something like this :
var test = 0;
$('#my_id').change(function(){
test = $('#my_id').html();
});
console.log(test);
This always returns me 0. I tried many things to get the current value of my tag but I can't find a way to succeed. Can you please help me get this integer ?
Cordially, Rob.
The change event is only fired by input elements. You can try polling the value like so:
var intervalId = setInterval(function() {
var value = parseInt($('#my_id').text(), 10);
if(value > 0) {
clearInterval(intervalId);
//... do stuff
}
}, 250); //poll every 250ms
Another way is to fire a custom event when you change the value:
//Somewhere in your code where you set the value in the i tag:
$('#my_id').text(value);
$('#my_id').trigger("valueChanged");
//Elsewhere in your code
$('#my_id').on("valueChanged", function() {
var value = parseInt($(this).text(), 10);
if(value > 0) {
//... do stuff
}
});

Difficulty with setInterval loop using class of Divs

$(document).ready(function fadeIt() {
$("#cool_content > div").hide();
var sizeLoop = $("#cool_content > div").length;
var startLoop = 0;
$("#cool_content > div").first().eq(startLoop).fadeIn(500);
setInterval(function () {
$("#cool_content > div").eq(startLoop).fadeOut(1000);
if (startLoop == sizeLoop) {
startLoop = 0
} else {
startLoop++;
}
$("#cool_content > div").eq(startLoop).fadeIn(1500);
}, 2000);
});
Here I want a class of divs to animate, infinitely!
However, because the interval is set to two seconds there is period where no div is showing!
What would be an appropriate way to loop the animation of these divs?
I thought about using a for loop but couldn't figure out how to pass a class of divs as arguments. All your help is appreciated.
Thanks!
Ok, generally, you should know that Javascript is a single threaded environment. Along with this, the timer events are generally not on time accurately. I'm not sure how jQuery is doing fadeIn and fadeOut, but if it's not using CSS3 transitions, it's going to be using timeOut and Intervals. So basically, there's a lot of timer's going on.
If you go with the for loop on this one, you'd be blocking the single thread, so that's not the way to go forward. You'd have to do the fade in/out by yourself in the setInterval.
Setting the opacity on each interval call. Like div.css('opacity', (opacity -= 10) + '%')
If you're trying to fade in and out sequentially, I think maybe this code would help
var opacity = 100,
isFadingIn = false;
window.setInterval(function() {
if (isFadingIn) {
opacity += 10;
if (opacity === 100) isFadingIn = false;
} else {
opacity -= 10;
if (opacity === 0) isFadingIn = true;
}
$('#coolContent > div').css('opacity', opacity + '%');
}, 2000);
Consider the following JavaScript / jQuery:
$(function(){
var divs = $('#cool_content > div').hide();
var curDiv;
var counter = 0;
var doUpdate = function(){
// Hide any old div
if (curDiv)
curDiv.fadeOut(1000);
// Show the new div
curDiv = divs.eq(counter);
curDiv.fadeIn(1000);
// Increment the counter
counter = ++counter % divs.length;
};
doUpdate();
setInterval(doUpdate, 2000);
});
This loops infinitely through the divs. It's also more efficient than your code because it only queries the DOM for the list of divs once.
Update: Forked fiddle
instead of
if (startLoop == sizeLoop)
{
startLoop = 0
}
else
{
startLoop++;
}
use
startLoop =(startLoop+1)%sizeLoop;
Check the demo http://jsfiddle.net/JvdU9/ - 1st div is being animated just immediately after 4th disappears.
UPD:
Not sure I've undestood your question, but I'll try to answer :)
It doesn't matter how many divs you are being looped - 4, 5 or 10, since number of frames are being calculated automatically
x=(x+1)%n means that x will never be greater than n-1: x>=0 and x<n.
x=(x+1)%n is just shorten equivalent for
if(x<n-1)
x++;
else
x=0;
as for me first variant is much readable:)
And sorry, I gave you last time wrong demo. Correct one - http://jsfiddle.net/JvdU9/2/

How can I add an event to an automated rotating image?

I'm using the following script and the later onclick-event. If I use the onclick my rotating banner loses it and starts displaying pictures at random intervals. I think I should override the "setTimeout" at the end of the first piece of code. Question is how exactly?
<script language="JavaScript" type="text/javascript">
<!--
var RotatingImage1_Index = -1;
var RotatingImage1_Images = new Array();
RotatingImage1_Images[0] = ["images/ban_image1.png","",""];
<!-- 15 Images in total-->
RotatingImage1_Images[14] = ["images/ban_image2.png","",""];
function RotatingImage1ShowNext(){
RotatingImage1_Index = RotatingImage1_Index + 1;
if (RotatingImage1_Index > 14)
RotatingImage1_Index = 0;
eval("document.RotatingImage1.src = RotatingImage1_Images[" + RotatingImage1_Index + "][0]");
setTimeout("RotatingImage1ShowNext();", 4000);}
// -->
</script>
<img src="images/ban_image1.png" id="ban_img1" name="RotatingImage1">
This part works as it should.
<div id="ban_next" align="left">
<a href="#" onclick="RotatingImage1ShowNext();return false;">
<img src="images/ban_next.png" id="ban_nxt1"></a></div>
This part works as well, but only correctly if I set the 'setTimeout' to '0'. I am sorry, I'm compleatly new to this. I was looking at this stackoverflow.com question, but I don't know how to implement that here.
I thank you in advance.
Edit:
The rotating image starts automaticly. It displays a new image every 4 seconds. The images have text on them, or better insider jokes. Readers should be tempted to read them, but if the automated rotation cought there antention, the have to keep that antention for a full minute to see all images. That's probably to long. So I thought to implement a button to overwrite the timer and show the next image 'on click'. But after the click the rotation-time should turn back to auto-rotation. That's the plan.
Thank you Prusse, for now it bedtime, I will try to grasp your answer tomorrow ;)
You don't need eval, just do document.RotatingImage1.src = RotatingImage1_Images[RotatingImage1_Index][0].
The described behavior happens because there is more then one timer firing. There is one set on the first time RotatingImage1ShowNext is called, more one each time its called from your onclick handler. To fix this declare a global for your timer and before another timeout is set clear it if set. Like:
var global_timerid;
function RotatingImage1ShowNext(){
//RotatingImage1_Index = RotatingImage1_Index + 1;
//if (RotatingImage1_Index > 14) RotatingImage1_Index = 0;
RotatingImage1_Index = (RotatingImage1_Index + 1) % RotatingImage1_Images.length;
//document.RotatingImage1.src = RotatingImage1_Images[RotatingImage1_Index][0];
document.getElementById('ban_img1').src = RotatingImage1_Images[RotatingImage1_Index][0];
if (global_timerid) clearTimeout(global_timerid);
global_timerid = setTimeout(RotatingImage1ShowNext, 4000);
}

Calculating the time between two clicks in Javascript

I want to calculate the time between two clicks of an attribute with javascript but I don't know how.
For example;
click here
if the user clicks more than once -let's say in 5 seconds- I want to display an alert. I'm using jQuery if that helps. I don't know much about javascript but I've been coding a small project in my free time.
Something like this would do the trick. Keep a variable with the time of the last click and then compare it when the user clicks the link again. If the difference is < 5 seconds show the alert
<a id='testLink' href="#">click here</a>
<script type='text/javascript'>
var lastClick = 0;
$("#testLink").click(function() {
var d = new Date();
var t = d.getTime();
if(t - lastClick < 5000) {
alert("LESS THAN 5 SECONDS!!!");
}
lastClick = t;
});
</script>
The following may help you getting started:
var lastClicked = 0;
function onClickCheck() {
var timeNow = (new Date()).getTime();
if (timeNow > (lastClicked + 5000)) {
// Execute the link action
}
else {
alert('Please wait at least 5 seconds between clicks!');
}
lastClicked = timeNow;
}
HTML:
click here
Create a variable to hold the time of a click, say lastClick.
Set up a click handler for the element you want to track clicks on.
Inside the handler, check for a value in lastClick. If there is no value, set it to the current time. If there is a value, compare it against the current time. If the difference is within the range you're checking for, display the alert.
Start with
var lastClicked = (new Date()).getTime(); //not zero

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