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Starting timer when clicking first card of memory game

Ok I am trying to wrap up a project and the only thing holding me back is it that they call for the timer to start on clicking a match game. The timer starts when the HTML file loads which is not what the project wants and I have tried some methods but ends up freezing the game. I want the timer to be able to start when clicking a card.
var open = [];
var matched = 0;
var moveCounter = 0;
var numStars = 3;
var timer = {
seconds: 0,
minutes: 0,
clearTime: -1
};
//Start timer
var startTimer = function () {
if (timer.seconds === 59) {
timer.minutes++;
timer.seconds = 0;
} else {
timer.seconds++;
};
// Ensure that single digit seconds are preceded with a 0
var formattedSec = "0";
if (timer.seconds < 10) {
formattedSec += timer.seconds
} else {
formattedSec = String(timer.seconds);
}
var time = String(timer.minutes) + ":" + formattedSec;
$(".timer").text(time);
};
This is the code for clicking on a card. I have tried to include a startTimer code into this but doesn't work.
var onClick = function() {
if (isValid( $(this) )) {
if (open.length === 0) {
openCard( $(this) );
} else if (open.length === 1) {
openCard( $(this) );
moveCounter++;
updateMoveCounter();
if (checkMatch()) {
setTimeout(setMatch, 300);
} else {
setTimeout(resetOpen, 700);
}
}
}
};
And this class code I use for my HTML file
<span class="timer">0:00</span>

Try this: https://codepen.io/anon/pen/boWQbe
All you needed to do was remove resetTimer() call from the function that happens on page load and then just do a check in the onClick (of card) to see if the timer has started yet. timer.seconds == 0 && timer.minutes == 0.

Remove div after fade out animation - javascript

I'm trying to remove a div from the body AFTER an animation is completed, but at the moment looks like the remove happens right after the first iteration of the animation.
function $(el) { return document.getElementById(el); }
var divFirst = $('first');
if(divFirst)
divFirst.addEventListener("click", addSecond);
function removeSecond()
{
fadeOut();
var child = $('second');
console.log("remove called");
child.remove();
}
function addSecond()
{
console.log("addSecond called");
var aContainer = document.createElement('div');
aContainer.setAttribute('id', 'second');
aContainer.innerHTML = "Second";
aContainer.addEventListener("click", removeSecond);
document.body.appendChild(aContainer);
fadeIn();
}
function fadeIn()
{
var secondDiv = $('second');
if(secondDiv)
{
secondDiv.style.opacity ? secondDiv.style.opacity :
secondDiv.style.opacity = "0.0";
if(parseFloat(secondDiv.style.opacity) <= 1)
{
secondDiv.style.opacity = parseFloat(secondDiv.style.opacity) + 0.05;
setTimeout(fadeIn, 50);
}
}
}
function fadeOut()
{
var secondDiv = $('second');
if(secondDiv)
{
console.log(secondDiv.style.opacity);
if(parseFloat(secondDiv.style.opacity) >0 )
{
secondDiv.style.opacity = parseFloat(secondDiv.style.opacity) - 0.05;
setTimeout(fadeOut, 50);
}
}
}
Here the jsfiddle: http://jsfiddle.net/ny85ckk2/
If I remove the child.remove() call, the animation continues till the end.
Any idea?
Thanks a lot

Your fadeOut is an asynchronous operation. When you call it, it starts the fade, but then the fade continues and completes asynchronously because you're using setTimeout. So your code after callilng fadeOut runs just after it starts.
To remove the element when done, remove that code and instead remove the element in fadeOut when done:
function fadeOut()
{
var secondDiv = $('second');
if(secondDiv)
{
console.log(secondDiv.style.opacity);
if(parseFloat(secondDiv.style.opacity) >0 )
{
secondDiv.style.opacity = parseFloat(secondDiv.style.opacity) - 0.05;
setTimeout(fadeOut, 50);
}
else // Added
{ // Added
secondDiv.remove(); // Added
} // Added
}
}
Or if you want more flexibility, have fadeOut call a callback when done and remove the element in the callback; we do that by separating out the actual work of the fade from starting it:
function fadeOut(callback)
{
var secondDiv = $('second');
if (secondDiv)
{
doFade();
}
function doFade() {
if(parseFloat(secondDiv.style.opacity) >0 )
{
secondDiv.style.opacity = parseFloat(secondDiv.style.opacity) - 0.05;
setTimeout(doFade, 50);
}
else if (callback)
{
callback(secondDiv);
}
}
}
Usage:
function removeSecond()
{
fadeOut(function(div) {
div.remove();
});
}
Fiddle

setInterval doesnt tigger inner script on first time run

Maybe I'm not properly understanding setInterval but I have made a kind of slideshow script, as below:
var i = 0;
setInterval(function() {
$('.slide').fadeOut('slow').delay(200);
$('.slide:eq(' + i + ')').fadeIn('slow').delay(2000);
i++;
if(i == 5){
i = 0;
}
}, 4000);
This works, except for the first run - no slides will display for the first 4 seconds.
See Fiddle here: http://jsfiddle.net/vpa89snf/6/
Is there anyway I can trigger whats inside the setInterval function when it runs the first time round?

Use setTimeOut instead of setInterval for better performance, inspect the sample below:
Here is working jsFiddle.
var i = -1;
var totalSlide = $('.slide').length-1;
var slideTimer = 0;
function nextFrame() {
i == totalSlide ? i = -1 : i;
i++;
$('.slide').fadeOut(200);
$('.slide').eq(i).fadeIn(200);
slideTimer = setTimeout(nextFrame,4000);
}
$('#holder').addClass('isAni');
nextFrame();
// play / pause animation
$('#holder').click(function() {
if ( $(this).hasClass('isAni') ) {
$(this).removeClass('isAni');
clearTimeout(slideTimer);
}else{
$(this).addClass('isAni');
nextFrame();
}
});

You need to run the function and not wait for the 4 first seconds:
var i = 0;
function doSomething() {
$('.slide').fadeOut('slow').delay(200);
$('.slide:eq(' + i + ')').fadeIn('slow').delay(2000);
i = (i + 1) % 5;
}
$document.ready(function () {
setInterval(doSomething, 4000);
doSomething(); // run it!
});
JSFIDDLE.

This is how setInterval is executed. It runs your function after x milliseconds set as 2nd parameter.
What you have to do in order to show the first slide is to have the 1rst slide fadein like below:
var i = 0;
$('.slide:eq(' + i + ')').fadeIn('slow').delay(2000);
i++;
setInterval(function() {
...
}, 4000);

Autostart jQuery slider

I'm using a script that animates on click left or right to the next div. It currently works fine but I'm looking to add two features to it. I need it to repeat back to the first slide if it is clicked passed the last slide and go to the last slide if click back from the first slide. Also, I'm interested in getting this to autostart on page load.
I've tried wrapping the clicks in a function and setting a setTimeout but it didn't seem to work. The animation is currently using CSS.
Here's the current JS:
<script>
jQuery(document).ready(function() {
var boxes = jQuery(".box").get(),
current = 0;
jQuery('.right').click(function () {
if (current == (-boxes.length + 1)){
} else {
current--;
updateBoxes();
}
console.log(-boxes.length + 1);
console.log(current);
});
jQuery('.left').click(function () {
if (current === 0){
} else{
current++;
updateBoxes();
}
});
function updateBoxes() {
for (var i = current; i < (boxes.length + current); i++) {
boxes[i - current].style.left = (i * 100 + 50) + "%";
}
}
});
</script>
Let me know if I need a jsfiddle for a better representation. So far, I think the code is pretty straightforward to animate on click.
Thanks.

Try
jQuery(document).ready(function () {
var boxes = jQuery(".box").get(),
current = 0,
timer;
jQuery('.right').click(function () {
if (current == (-boxes.length + 1)) {
current = 0;
} else {
current--;
}
updateBoxes();
}).click(); //initialize the view
jQuery('.left').click(function () {
if (current === 0) {
current = -boxes.length + 1;
} else {
current++;
}
updateBoxes();
});
function updateBoxes() {
//custom implementation for testing
console.log('show', current)
$(boxes).hide().eq(-current).show();
autoPlay();
}
function autoPlay() {
clearTimeout(timer);
//auto play
timer = setTimeout(function () {
jQuery('.right').click();
}, 2500)
}
});
Demo: Fiddle

Here's an example based on my comment (mostly pseudocode):
$(function(){
var boxes = $('.box'),
current = 0,
timer;
// Handler responsible for animation, either from clicking or Interval
function animation(direction){
if (direction === 1) {
// Set animation properties to animate forward
} else {
// Set animation properties to animate backwards
}
if (current === 0 || current === boxes.length) {
// Adjust for first/last
}
// Handle animation here
}
// Sets/Clears interval
// Useful if you want to reset the timer when a user clicks forward/back (or "pause")
function setAutoSlider(set, duration) {
var dur = duration || 2000;
if (set === 1) {
timer = setInterval(function(){
animation(1);
}, dur);
} else {
clearInterval(timer)
}
}
// Bind click events on arrows
// We use jQuery's event binding to pass the data 0 or 1 to our handler
$('.right').on('click', 1, function(e){animation(e.data)});
$('.left').on('click', 0, function(e){animation(e.data)});
// Kick off animated slider
setAutoSlider(1, 2000);
Have fun! If you have any questions, feel free to ask!

How do I display a div when my timer hits zero?

here's my code:
$('#TESTER').hide();
$('#titlehead2').click(
function() {
var doUpdate = function() {
$('.countdown').each(function() {
var count = parseInt($(this).html());
if (count !== 0) {
$(this).html(count - 1);
}
});
};
setInterval(doUpdate,1000);
if(count <= 0) $('#TESTER').show();
}
);
#TESTER is the div I want to display when the timer reaches zero, and #titlehead2 is my play button for the timer. Any help will be much appreciated.

You need to check the value of counter within the timer
$('#TESTER').hide();
$('#titlehead2').click(function () {
var doUpdate = function () {
//need to look whether the looping is needed, if there are more than 1 countdown element then the timer logic need to be revisted
$('.countdown').each(function () {
var count = parseInt($(this).html());
if (count !== 0) {
$(this).html(count - 1);
} else {
$('#TESTER').show();
//you also may want to stop the timer once it reaches 0
clearInterval(timer);
}
});
};
var timer = setInterval(doUpdate, 1000);
});