I have this slider where the gotoslide function changes the slide when the navigation links are pressed.
http://jsfiddle.net/AHYVr/
What is the way to make a loop where the gotoslide function autoruns from 0 to lastone and then goes back to start?
var num_slides;
var slides;
var current;
var sa_auto = true;
jQuery(document).ready(function() {
init_slide()
});
function init_slide(){
slides = jQuery('.slides_container div');
num_slides = (slides).length;
pagination = '<ul class="pagination">';
var i=1;
jQuery.each(slides, function() {
pagination += '<li>'+i+'</li>';
i++;
});
pagination += '</ul>';
jQuery(pagination).insertBefore('#slides');
}
function gotoslide(n){
sa_auto = false;
showslide(n);
}
function showslide(n){
current = n;
var leftpos = (1-n)*700;
pagination = jQuery('.pagination li')
pagination.removeClass('current');
jQuery(pagination[n-1]).addClass("current");
slides.removeClass('current');
jQuery(slides[n-1]).addClass("current");
jQuery('.slides_container').animate({
left: leftpos
}, 2000);
}
I've tried to make a function that increases the gotoslide parameter by 1 and then use it with a setInterval, but it fails. This is the code:
var t;
function time (){
if ( j < num_slides ) {
show_slide(j++);
}
};
t= setInterval(time, 2000);
clearInterval(t);
I'm still not sure I 100% understand your question, but I will say that your setInterval will do nothing, because the moment you create it, you cancel it. Calling clearInterval(t) is used when you want an interval to stop, and not fire again. So, by calling clearInterval the very next line after you create it, it will never fire.
If you want to switch slides once every 2 seconds, and start back over again once you reach the end, try something like this:
var currentSlide = 0;
var nextSlide = function(){
currentSlide++
if(currentSlide >= num_slides){
currentSlide = 0;
}
show_slide(currentSlide);
}
var interval = setInterval(nextSlide, 2000);
Have you tried:
function init_slide(){
slides = jQuery('.slides_container div');
num_slides = (slides).length;
pagination = '<ul class="pagination">';
var i=1;
jQuery.each(slides, function() {
pagination += '<li>'+i+'</li>';
i++;
});
pagination += '</ul>';
jQuery(pagination).insertBefore('#slides');
for ( var n=0;n <num_slides; n++ ){
gotoslide(n)
}
}
There we go:
for ( var n=1;n <= i; ++n ){
if(n == i) { gotoslide(1);}
else {
gotoslide(n);
}
}
I dont know why you are using var i = 1; imho it is kinda confusing.
I added functionality to start and stop the slideshow at whatever slide you want.
function initSlideshow( slides, duration, fadeDuration ) {
var slide = 0;
function nextSlide( ) {
if( slide >= slides.length ) slide = 0;
slides.hide();
$(slides[slide]).fadeIn( fadeDuration );
slide++;
setTimeout( nextSlide, duration );
}
function stopSlideshow( num ) {
slide = ( num >= 0 && num < slides.length ) ? num : 0;
window.clearTimeout( timer );
slides.hide();
$(slides[slide]).fadeIn( fadeDuration );
}
function startSlideshow( num ) {
if( timer ) window.clearTimeout( timer );
slide = ( num >= 0 && num < slides.length ) ? num : 0;
timer = setTimeout( nextSlide, 1 );
}
var timer = setTimeout( nextSlide, 1 );
return {
stop: stopSlideshow,
start: startSlideshow
};
}
// example usage
var controller = initSlideshow( $(".slides"), 3000 );
controller.stop( 3 );
controller.start( 1 );
Fiddle here
Related
I'm trying to make a carousel that runs automatically, but if a user interacts with the controls I want the carousel to reset its timer.
What ive built works to an extent, but if you interact with the control-dot the timer isnt reset so it throws some funny results...
Here's my JS
/* Js for carousel */
$('.steps__step-1').addClass('active');
$(function() {
var lis = $('.step'),
currentHighlight = 0;
N = 5; // Duration in seconds
setInterval(function() {
currentHighlight = (currentHighlight + 1) % lis.length;
lis.removeClass('active').eq(currentHighlight).addClass('active');
}, N * 1000);
});
$('.control-dot').on('click', function(e) {
e.preventDefault();
$('.active').removeClass('active');
var itemNo = $(this).index() - 1;
$('.step').eq(itemNo).addClass('active');
});
http://jsfiddle.net/tnzLha3o/1/
You should store interval id in a variable (let intervalId = setInterval(...)) and then use it to restart it.
Here is your updated fiddle: http://jsfiddle.net/gudzdanil/uzoydp6a/2/
So that your code will look like:
var duration = 5;
var lis = $('.step'),
currentHighlight = 0;
var intervalId = null;
$(function() {
$('.steps__step-1').addClass('active');
runCarousel();
});
$('.control-dot').on('click', function(e) {
e.preventDefault();
$('.active').removeClass('active');
var itemNo = $(this).index() - 1;
$('.step').eq(itemNo).addClass('active');
rerunCarousel();
});
function rerunCarousel() {
if(intervalId) clearInterval(intervalId);
intervalId = null;
runCarousel();
}
function runCarousel() {
intervalId = setInterval(function() {
currentHighlight = (currentHighlight + 1) % lis.length;
lis.removeClass('active').eq(currentHighlight).addClass('active');
}, N * 1000)
}
Add a variable to stop it.
var stop = false
$('.steps__step-1').addClass('active');
$(function() {
var lis = $('.step'),
currentHighlight = 0;
N = 5; // Duration in seconds
setInterval(function() {
if (!stop) {
currentHighlight = (currentHighlight + 1) % lis.length;
lis.removeClass('active').eq(currentHighlight).addClass('active');
}
}, N * 1000);
});
$('.control-dot').on('click', function(e){
e.preventDefault();
$('.active').removeClass('active');
var itemNo = $(this).index() - 1;
$('.step').eq(itemNo).addClass('active');
stop = !stop
});
http://jsfiddle.net/quvgxz63/
Hi friends i want to fade in a div when i click on another div and for that i am using following code. Code1 works fine but i require to use the Code2.
I know there is jQuery but i require to do this in JavaScript
Can you guide me that what kind of mistake i am doing or what i need change...
Code1 --- Works Fine
function starter() { fin(); }
function fin()
{
for (i = 0; i <= 1; i += 0.01)
{
i=Math.round(i*100)/100;
setTimeout("seto(" + i + ")", i * 1000);
}
}
function seto(opa)
{
var ele = document.getElementById("div1");
ele.style.opacity = opa;
}
Code2 --- Does not work
function starter()
{
var ele = document.getElementById("div1");
fin(ele);
}
function fin(ele)
{
for (i = 0; i <= 1; i += 0.01)
{
i=Math.round(i*100)/100;
setTimeout("seto(" + ele + "," + i + ")", i * 1000);
}
}
function seto(ele,opa)
{
ele.style.opacity = opa;
}
Based on this site
EDIT-1
Added the functionality so that user can specify the animation duration(#Marzian comment)
You can try this:
function fadeIn(el, time) {
el.style.opacity = 0;
var last = +new Date();
var tick = function() {
el.style.opacity = +el.style.opacity + (new Date() - last) / time;
last = +new Date();
if (+el.style.opacity < 1) {
(window.requestAnimationFrame && requestAnimationFrame(tick)) || setTimeout(tick, 16);
}
};
tick();
}
var el = document.getElementById("div1");
fadeIn(el, 3000); //first argument is the element and second the animation duration in ms
DEMO
Update:
It seems that people enjoy my minimalistic and elegant approach, Updated for 2022:
No need for complex mechanisms. Just use CSS, which has it out of the box and has better performance overall.
Basically you achieve it with CSS by setting a transition for the opacity. In JavaScript that would be:
const div = document.querySelector('#my-div');
div.style.transition='opacity 1s';
and as a trigger you just set opacity to 0:
div.style.opacity=0;
This will create a 1 second fade out effect and you can use the trigger anywhere. The inverse can also be done to achieve a fade in effect.
Here's a working example:
const div = document.querySelector('#my-div');
div.style.transition='opacity 1s';
// set opacity to 0 -> fade out
setInterval(() => div.style.opacity=0, 1000);
// set opacity to 1 -> fade in
setInterval(() => div.style.opacity=1, 2000);
#my-div { background-color:#FF0000; width:100%; height:100%; padding: 10px; color: #FFF; }
<div id="my-div">Hello!</div>
Seems like your attempting to convert your element, to a string. Try this instead
function starter()
{
var ele = document.getElementById("div1");
fin(ele);
}
function fin(ele)
{
for (i = 0; i <= 1; i += 0.01)
{
i=Math.round(i*100)/100;
setTimeout(function() { setto(ele,i); }, i * 1000);
}
}
function seto(ele,opa)
{
ele.style.opacity = opa;
}
What happens here is, that i call a anonnymous function when the timer hits, and from that function, execute my functioncall to setto.
Hope it helps.
Jonas
The problem here is you are using the pass-a-string method of using setTimeout. Which is basically just a hidden eval.
It's worth noting that this is a bad practice, slow performer, and security risk.
(see questions such as this: setTimeout() with string or (anonymous) function reference? speedwise)
The reason this is causing your problem is because "seto(" + ele + "," + i + ")" is going to evaluate to "seto('[object HTMLDivElement]', 1)". You really want to pass reference to the ele object -- but the value's being cast to a string when you tried concatenating an object onto a string. You can get around this by using the pass-a-function method of using setTImeout.
setTimeout(function() { seto(ele, i); }, i * 1000);
I believe making this change will make your Code2 behavior equivalent to Code1.
Below are the complete answers to my question
ANS1 --- DEMO
function fin() {
var i = 0;
var el = document.getElementById("div1");
fadeIn(el,i);
}
function fadeIn(el,i) {
i = i + 0.01;
seto(el,i);
if (i<1){setTimeout(function(){fadeIn(el,i);}, 10);}
}
function seto(el,i) {
el.style.opacity = i;
}
ANS2 --- DEMO
function fin(){
var i = 0;
var el = document.getElementById("div1");
fadeIn(el,i);
}
function fadeIn(el,i) {
var go = function(i) {
setTimeout( function(){ seto(el,i); } , i * 1000);
};
for ( i = 0 ; i<=1 ; i = i + 0.01) go(i);
}
function seto(el,i)
{
el.style.opacity = i;
}
My version
function fadeIn($element){
$element.style.display="block";
$element.style.opacity=0;
recurseWithDelayUp($element,0,1);
}
function fadeOut($element){
$element.style.display="block";
$element.style.opacity=1;
recurseWithDelayDown($element,1,0);
}
function recurseWithDelayDown($element,startFrom,stopAt){
window.setTimeout(function(){
if(startFrom > stopAt ){
startFrom=startFrom - 0.1;
recurseWithDelayDown($element,startFrom,stopAt)
$element.style.opacity=startFrom;
}else{
$element.style.display="none"
}
},30);
}
function recurseWithDelayUp($element,startFrom,stopAt){
window.setTimeout(function(){
if(startFrom < stopAt ){
startFrom=startFrom + 0.1;
recurseWithDelayUp($element,startFrom,stopAt)
$element.style.opacity=startFrom;
}else{
$element.style.display="block"
}
},30);
}
function hide(fn){
var hideEle = document.getElementById('myElement');
hideEle.style.opacity = 1;
var fadeEffect = setInterval(function() {
if (hideEle.style.opacity < 0.1)
{
hideEle.style.display='none';
fn();
clearInterval(fadeEffect);
}
else
{
hideEle.style.opacity -= 0.1;
}
}, 20);
}
function show(){
var showEle = document.getElementById('myElement');
showEle.style.opacity = 0;
showEle.style.display='block';
var i = 0;
fadeIn(showEle,i);
function fadeIn(showEle,i) {
i = i + 0.05;
seto(showEle,i);
if (i<1){setTimeout(function(){fadeIn(showEle,i);}, 25);}
}
function seto(el,i)
{
el.style.opacity = i;
}
}
hide(show);
I just improved on laaposto's answer to include a callback.
I also added a fade_out function.
It could be made more efficient, but it works great for what i'm doing.
Look at laaposto's answer for implementation instructions.
You can replace the JS in his fiddle with mine and see the example.
Thanks laaposto!
This really helped out for my project that requires zero dependencies.
let el = document.getElementById( "div1" );
function fade_in( element, duration, callback = '' ) {
element.style.opacity = 0;
let last = +new Date();
let tick = function() {
element.style.opacity = +element.style.opacity + ( new Date() - last ) / duration;
last = +new Date();
if ( +element.style.opacity < 1 )
( window.requestAnimationFrame && requestAnimationFrame( tick ) ) || setTimeout( tick, 16 );
else if ( callback !== '' )
callback();
};
tick();
}
function fade_out( element, duration, callback = '' ) {
element.style.opacity = 1;
let last = +new Date();
let tick = function() {
element.style.opacity = +element.style.opacity - ( new Date() - last ) / duration;
last = +new Date();
if ( +element.style.opacity > 0 )
( window.requestAnimationFrame && requestAnimationFrame( tick ) ) || setTimeout( tick, 16 );
else if ( callback !== '' )
callback();
};
tick();
}
fade_out( el, 3000, function(){ fade_in( el, 3000 ) } );
Cheers!
I cant get my head around this, been trying many many different ways but no luck.. Basically, I'm trying to pause the animation on mouseOver and resume it on mouseOut. I was able to make it pause by simply using clearTimeout() but I have no idea on how to resume it back on. Please kindly advise me with a correct solution and syntax.
Thank you in advance!
(function ($) {
$.fn.simpleSpy = function (interval, limit) {
limit = limit || 3;
interval = interval || 3000;
items = [];
return this.each(function () {
$list = $(this),
currentItem = 0,
total = 0; // initialise later on
var i = 0;
smplet = $list.clone();
smplet.css("display","none");
$("body").append(smplet);
total = smplet.find('> li').length;
$list.find('> li').filter(':gt(' + (0) + ')').remove();
$list.css("display","");
height = $list.find('> li:first').height();
$list.wrap('<div class="spyWrapper" />').parent().css({ height : 55, position:"relative", overflow:"hidden" });
$('.close').click(function(){
clearTimeout(timec);
if(currentItem == 0 && smplet.length != 1)
delitem=total;
else
delitem=currentItem - 1;
smplet.find('> li').eq(delitem).remove();
currentItem--;
var temp=smplet.find('> li').eq(currentItem).clone();
var $insert = temp.css({
"margin-top":-height-height/3,
opacity : 0
}).prependTo($list);
// fade the LAST item out
$list.find('> li:last').animate({ opacity : .5 ,"margin-top":height/3}, 500, function () {
$(this).remove();
});
$insert.animate({"margin-top":0,opacity : 1 }, 500).animate({opacity : 1},1000);
currentItem++;
total=smplet.find('> li').length;
if (currentItem >= total) {
currentItem = 0;
}
if (total == 1){
simpleSpy.stop();
}
else if(total == 0){
$("#topbar").hide();
}
timec=setTimeout(spy, interval);
});
currentItem++;
function spy() {
var temp=smplet.find('> li').eq(currentItem).clone();
var $insert = temp.css({
"margin-top":-height-height/3,
opacity : 0,
display : 'none'
}).prependTo($list);
$list.find('> li:last').animate({ opacity : .5 ,"margin-top":height/3}, 500, function () {
$(this).remove();
});
$insert.animate({"margin-top":0,opacity : 1 }, 500).animate({opacity : 1},1000);
$insert.css("display","");
currentItem++;
if (currentItem >= total) {
currentItem = 0;
}
timec=setTimeout(spy, interval);
}
timec=setTimeout(spy, interval);
});
};
$('ul.alerts')
.mouseover(function(){
clearTimeout(timec);
})
.mouseout(function(){
timec=setTimeout(spy, interval);
});
})(jQuery);
Call
$(document).ready(function() {
$('ul.alerts').simpleSpy();
});
jsfiddle with html and css
http://jsfiddle.net/1781367/3eK4K/3/
I changed the timeout, which you were setting over and over, to an interval, which you only need to set once. Then I added a "paused" property that is set to true on mouseover and back to false on mouseout.
var paused = false;
$list.mouseover(function() { paused = true; });
$list.mouseout(function() { paused = false; });
Then we just check that property before the rotation animation occurs:
if (paused) {
return;
}
http://jsfiddle.net/3eK4K/6/
I am having trouble creating a slider that pauses on hover, because I execute the animation function again on mouse off, if I flick the mouse over it rapidly (thereby calling the function multiple times) it starts to play up, I would like it so that the function is only called if the other function is complete, otherwise it does not call at all (to avoid queue build up and messy animations)
What's the easiest/best way to do this?
$(document).ready(function() {
//get variables
var slide_width = $('.slider_container').width();
var number_of_slides = $('.slider_container .slide').length;
var slider_width = slide_width*number_of_slides;
//set element dimensions
$('.slide').width(slide_width);
$('.slider').width(slider_width);
var n = 1;
$('.slider_container').hover(function() {
//Mouse on
n = 0;
$('.slider').stop(true, false);
}, function() {
//Mouse off
n = 1;
if (fnct == 0) sliderLoop();
});
//Called in Slide Loop
function animateSlider() {
$('.slider').delay(3000).animate({ marginLeft: -(slide_width * i) }, function() {
i++;
sliderLoop();
});
}
var i = 0;
var fnct = 0
//Called in Doc Load
function sliderLoop() {
fnct = 1
if(n == 1) {
if (i < number_of_slides) {
animateSlider();
}
else
{
i = 0;
sliderLoop();
}
}
fnct = 0
}
sliderLoop();
});
The slider works fine normally, but if I quickly move my mouse on and off it, then the slider starts jolting back and forth rapidly...been trying to come up with a solution for this for hours now..
Here's what fixed it, works a charm!
$(document).ready(function() {
//get variables
var slide_width = $('.slider_container').width();
var number_of_slides = $('.slider_container .slide').length;
var slider_width = slide_width*number_of_slides;
//set element dimensions
$('.slide').width(slide_width);
$('.slider').width(slider_width);
var n = 1;
var t = 0;
$('.slider_container').hover(function() {
clearInterval(t);
}, function() {
t = setInterval(sliderLoop,3000);
});
var marginSize = i = 1;
var fnctcmp = 0;
//Called in Doc Load
function sliderLoop() {
if (i < number_of_slides) {
marginSize = -(slide_width * i++);
}
else
{
marginSize = i = 1;
}
$('.slider').animate({ marginLeft: marginSize });
}
t = setInterval(sliderLoop,3000);
});
I have built a jQuery rotator to rotate through 3 divs and loop them. I would like to add the functionality on mouse over to "freeze" the current div and then start again on mouse out.
I've thought about setting a variable to false at the start of the function and setting it true when it's on it's current frame but I've got my self a bit confused.
I've also tried to use the hover function but when using the in and out handlers, I'm confused as to how to stop, restart the animation.
function ImageRotate() {
var CurrentFeature = "#container" + featureNumber;
$(CurrentFeature).stop(false, true).delay(4500).animate({'top' : '330px'}, 3000);
var featureNumber2 = featureNumber+1;
if ( featureNumber == numberOfFeatures) {featureNumber2 = 1}
var NewFeature = "#container" + featureNumber2;
$(NewFeature).stop(false, true).delay(4500).animate({'top' : '0px'}, 3000);
var featureNumber3 = featureNumber-1;
if ( featureNumber == 1) {featureNumber3 = numberOfFeatures};
var OldFeature = "#container" + featureNumber3;
$(OldFeature).stop(false, true).delay(4500).css('top' , '-330px');
setTimeout('if (featureNumber == numberOfFeatures){featureNumber = 1} else {featureNumber++}; ImageRotate2()', 7500)};
Any help would be greatly appreciated!!
Thanks, Matt
If you were to add this code:
var timerId = null;
function startRotation() {
if (timerId) {
return;
}
timerId = setInterval('if (featureNumber == numberOfFeatures){featureNumber = 1} else {featureNumber++}; ImageRotate2()', 7500);
}
function stopRotation() {
if (!timerId) {
return;
}
clearInterval(timerId);
timerId = null;
}
and replace the last line of your code block with a simple call to startRotation();, then you could call stopRotation and startRotation when the mouse hovers over/leaves your element:
$('your-element-selector').hover(stopRotation, startRotation);
It's not clear what you are trying to do with the three divs without seeing the HTML and more code, so I think a basic example might help you better (demo).
HTML
<div class="test">image: <span></span></div>
Script
$(document).ready(function(){
var indx = 0, loop, numberOfFeatures = 5;
function imageRotate(){
indx++;
if (indx > numberOfFeatures) { indx = 1; }
$('.test span').text(indx);
loop = setTimeout( imageRotate , 1000 );
}
imageRotate();
$('.test').hover(function(){
clearTimeout(loop);
}, function(){
imageRotate();
});
})
changed things up a little bit, here is how I ended up doing it. `
var animRun = false;
var rotateHover = false;
function startRotation() {
rotateHover = false;
ImageRotate();
}
function stopRotation() {
rotateHover = true;
clearTimeout();
}
function ImageRotate() {
if (rotateHover == false){
animRun = true;
var CurrentFeature = "#container" + featureNumber;
$(CurrentFeature).stop(false, true).animate({'top' : '330px'}, featureDuration, function(){animRun = false;});
var featureNumber2 = featureNumber+1;
if ( featureNumber == numberOfFeatures) {featureNumber2 = 1}
var NewFeature = "#container" + featureNumber2;
$(NewFeature).stop(false, true).animate({'top' : '0px'}, featureDuration); /* rotate slide 2 into main frame */
var featureNumber3 = featureNumber-1;
if ( featureNumber == 1) {featureNumber3 = numberOfFeatures};
var OldFeature = "#container" + featureNumber3;
$(OldFeature).stop(false, true).css('top' , '-330px'); /*bring slide 3 to the top*/
//startRotation();
setTimeout('if (featureNumber == numberOfFeatures){featureNumber = 1} else {featureNumber++}; if (rotateHover == false){ImageRotate2()};', featureDelay);
};
};