I do not have much experience in animation on Jquery. I want to make a simple animation that will highlight my text line by line with the possibility of stopping. I know how to do something like this for one line but I have no idea how to deal with loop.
here is my code:
var lines = $('#page')[0].getClientRects();
for (var i=0, max = lines.length; i < max; i++)
{
$('#under_liner')
.queue(function() {
$(this).css('top', lines[i].bottom).dequeue();
})
.animate({
width: lines[i].right - lines[i].left
}, 1000 )
.queue(function() {
$(this).css('width', 0).dequeue();
});
}
and jsfiddle http://jsfiddle.net/mz03kfua/2
I don't know if this is exactly what you are looking for, but here's how I'd do it.
Make a function that does the underlining
Make a recursive call on animation callback
Create a global variable to keep count of the current underlined line
Add a boolean that stops the function when false
var lines = $('#page')[0].getClientRects();
var play = true;
var index = 0;
underlineLine();
$('button').click(function(){
play = !play
if(play){
underlineLine()
$(this).html("STOP")
}else{
$(this).html("CONTINUE")
}
})
function underlineLine(){
if(index >= lines.length) return
if(play){
$('#under_liner').css('top', lines[index].bottom).dequeue();
$('#under_liner').css('width','0px');
$('#under_liner').animate({
width: lines[index].right - lines[index].left
}, 1000, function(){
underlineLine(index++)
})
$('#under_liner').css('width', 0).dequeue();
}
}
HERE IS A FIDDLE WITH THE CODE.
Hope it helps.
http://jsfiddle.net/mz03kfua/4/
var lines = $('#page')[0].getClientRects();
var current = 0;
var element;
function animateLine() {
if(typeof lines[current] !== "object") {
return;
}
var line = lines[current];
element = jQuery("<div />", {"class": "under_liner"}).prependTo("#page");
element.css({top: line.bottom}).animate({width: line.width}, 1000, function() {
current++;
animateLine();
});
}
function stopLine(e) {
e.preventDefault();
element.stop(true);
}
jQuery(".stop").click(stopLine);
animateLine();
Related
I don't know what's wrong with my code. I cannot pass a function in my javascript, [i don't want to put it inline]
My problem is my prev button and next button doesn't work, I also tried to put return false on prev and next to stop refreshing the page, but it still refreshing on click.
This is my code [please also see my comments] and my codepen:
$(document).ready(function slider() {
$('#img1').show('fade', 500);
$('#img1').delay(5000).hide("slide", { direction: 'left' }, 500);
});
var count = 2;
setInterval(function loop() {
var all = document.getElementsByTagName('li').length; // <-- i got the li elements so i did the same to prev and next
$('#img' + count).show('slide', { direction: 'right' }, 500);
$('#img' + count).delay(5500).hide('slide', { direction: 'left' }, 500);
if (count === all) {
count = 1;
} else {
count += 1;
}
}, 6500);
var sliderInt = 1;
var sliderNext = 2;
document.getElementsByClassName('prev').onclick = function prev() { // <-- not working
console.log('clicked prev');
var newSlide = sliderInt - 1;
showSlide(newSlide);
return false;
}
document.getElementsByClassName('next').onclick = function next() { // <-- not working
console.log('clicked next');
var newSlide = sliderInt + 1;
showSlide(newSlide);
return false;
}
function stopLoop() {
window.clearInterval(loop());
}
function showSlide(id) { // <-- this function doesn't work from prev and next
stopLoop(); // <-- I want to stop the loop() function when prev and next is clicked
if (id > count) {
id = 1;
} else if (id < 1) {
id = count;
}
$('li').hide('slide', { direction: 'left' }, 500);
$('#img' + id).show('slide', { direction: 'right' }, 500);
sliderInt = id;
sliderNext = id + 1;
window.slider(); // <-- I want to call the function slider here
}
a fix demo will be much appreciated :)
When you use the document.getElementsByClassName('prev').onclick you got an array. Use it like below
document.getElementsByClassName('prev')[0].onclick
document.getElementsByClassName('next')[0].onclick
getElementsByClassName returns a HTMLCollection. So you need to pass the relevant index to which you want to add the onclick function
document.getElementsByClassName('next')[0]
But this will attach the event only on the first element in the collection.
An more relevant example is
var list = document.getElementsByClassName('next or prev');
for (var i = 0, len = list.length; i < len; i++) {
(function(i){ // creating closure
list[i].addEventListener('click',function(){
// code you want to execute on click of next or prev
}
}(i))
}
As you are already using jquery you can avoid all this if you use class selector
$('.next or .prev').on('click',function(event){
// relevant code
})
This code goes direct to the last position of the array, what I want is to iterate or cycle through them all and at the last position go to the first of the array. I'm tried something else but it gave me an error parsing left in firefox. This is the code fiddle Demo.
Body:
<div id="placeDiv">ok</div>
<script>
var times = ["2px","2000px","200px","12px","20px","200px","2000px"];
var move=times;
var i=0;
if(i == move.length-1)
{i=0;}
else
{i=i+1;};
document.getElementById("placeDiv").style.left=move[i];
</script>
Css:
<style>#placeDiv{position:absolute;top:0px;width:100px;height:100px;background-color:purple}</style>
This code does not work:
var times = [];
for (var i = 0; i < 30000; i++) {
times.push("\""+i+"px\"");
} var move=times;
if(i == move.length-1)
{i=0;}
else
{i=i+1;};
document.getElementById("placeDiv").style.left=move[i];
With the code above I get a this error in firefox:
Error in parsing value for 'left'. Declaration dropped.
You will need to use setTimeout here. For example:
var times = ["2px", "20px", "30px", "12px", "20px", "200px", "20px"],
move = 0,
div = document.getElementById("placeDiv");
setTimeout(function next() {
div.style.left = times[move++ % times.length];
setTimeout(next, 1000)
}, 1000);
To cycle an array values it's very useful to use % operator.
Demo: http://jsfiddle.net/m6w6K/1/
Or with setInterval:
function makeMove() {
div.style.left = times[move++ % times.length];
}
setInterval(makeMove, 1000);
Demo: http://jsfiddle.net/m6w6K/4/
Try this:
function sleep(millis, callback) {
setTimeout(function()
{ callback(); }
, millis);
}
var times = ["2px","20px","20px","12px","20px","2000px","20px"];
var move=times;
var i=0;
(function foobar_cont(){
if(i == move.length-1) {i=0;}
else {i=i+1;};
document.getElementById("placeDiv").style.left=move[i];
sleep(1000, foobar_cont);
})();
Demo
I've taken dfsq's original answer, and added some spice to it:
$(div).animate({left: times[move++ % times.length]}, 500);
Demo
There was a syntax error in your codes ... Link . It works very well for me but .. the "times" or transition is not visible to the user .. cause its to fast. :)
<div id="placeDiv">ok</div>
<script>
var times = ["2px","2000px","200px","12px","20px","200px","2000px"];
var move=times;
var i=0;
if(i == move.length-1)
{i=0;}
else
{i=i+1;}
document.getElementById("placeDiv").style.left=move[i];
</script>
I'm trying to run each animation function one after the other instead of all at once.
This is what I've got so far:
$(document).ready(function(){
var bars = $('.bar');
bars.each(function(){
var widthpercent = $(this).attr("data-percent");
$(this).fadeIn();
$(this).animate({width:widthpercent},500);
});
});
I've tried using .delay() and setTimeout() in various combinations to no avail.
Could anyone point me in the right direction? Thank you!
It sounds to me like you're looking for animate's complete function. You can write a recursive function to keep calling the function in the complete function until all the items have been animated. To simplify: every time one element is animated, a callback is fired that animates the next element. That is the purpose of the complete parameter, so I'm certain that is what you're looking for.
Here's an example you can adapt to your specific needs.
Live demo here (click).
var $divs = $('div');
function animate(element) {
$(element).animate({height: '30px'}, {
complete: function() {
if (current < $divs.length-1) {
++current;
animate($divs[current]);
}
}
});
}
var current = 0;
animate($divs[current]);
Further, this same logic can be applied to your fadeIn. Just wrap fadeIn's callback around that logic, like this:
Live demo here (click).
var $divs = $('div');
function animate(element) {
$(element).fadeIn(function() { //now the animation is a callback to the fadeIn
$(element).animate({height: '70px'}, {
complete: function() {
if (current < $divs.length-1) {
++current;
animate($divs[current]);
}
}
});
});
}
var current = 0;
animate($divs[current]);
And here's your code: live demo here (click).
$(document).ready(function(){
var $divs = $('.bar');
function animate(element) {
$(element).fadeIn(function() { //you could unwrap this depending on what you're looking for
var widthpercent = $(element).attr("data-percent");
$(element).animate({
width:widthpercent,
duration: '500ms'
}, {
complete: function() {
if (current < $divs.length-1) {
++current;
animate($divs[current]);
}
}
});
}); //end fadeIn callback
}
var current = 0;
animate($divs[current]);
});
Try this:
var animate = function (el) {
return function () {
var widthpercent = el.data('percent');
el.fadeIn();
el.animate({
width: widthpercent
}, 500);
}
}
var bars = $('.bar');
bars.each(function (index) {
var $this = $(this);
setTimeout(animate($this), index * 500);
});
Fiddle
$(document).ready(function(){
var bars = $('.bar');
bars.each(function(i){
var widthpercent = $(this).attr("data-percent");
$(this).delay(i*800).animate({width:widthpercent,opacity:1,},500);
});
});
This will animate after delaying 800 * i milliseconds.
See this JSFiddle example.
I am attempting to create a responsive slider, that will change to a simple set of dot points when in mobile mode (< 940).
The issue I am facing is in my else statement I am unable to clearintervals that were made in the if statement, because t comes up as undefined. I have resorted to using
for (var i = 1; i < 99999; i++) window.clearInterval(i); to clear the interval which works, but I don't like it because it's ugly and cumbersome, is there another way of accomplishing this?
$(document).ready(function() {
function rePosition() {
//get responsive width
var container_width = $('.container').width();
//Slider for desktops only
if(container_width >= 940) {
//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,6000);
});
var marginSize = i = 1;
//Called in Doc Load
function sliderLoop(trans_speed) {
if (trans_speed) {
var trans_speed = trans_speed;
}
else
{
var trans_speed = 3000;
}
if (i < number_of_slides) {
marginSize = -(slide_width * i++);
}
else
{
marginSize = i = 1;
}
$('.slider').animate({ marginLeft: marginSize }, trans_speed);
}
t = setInterval(sliderLoop,6000);
$('.items li').hover(function() {
$('.slider').stop();
clearInterval(t);
var item_numb = $(this).index();
i = item_numb;
sliderLoop(500);
}, function() {
t = setInterval(sliderLoop,6000);
});
}
else
{
for (var i = 1; i < 99999; i++)
window.clearInterval(i);
$('.slider').stop(true, true);
$('.slider').css('margin-left', '0px');
//rearrange content
if($('.slider .slide .slide_title').length < 1) {
$('.items ul li').each(function() {
var item_numb = $(this).index();
var content = $(this).text();
$('.slider .slide:eq(' + item_numb + ')').prepend('<div class="title slide_title">' + content + '</div>')
});
}
}
}
rePosition();
$(window).resize(function() {
rePosition();
});
});
Teemu's comment is correct. I'll expand on it. Make an array available to all of the relevant code (just remember that globals are bad).
$(document).ready(function() {
var myIntervalArray = [];
Now, whenever you create an interval you will need to reference later, do this:
var t = setInterval();//etc
myIntervalArray.push(t); //or just put the interval directly in.
Then to clear them, just loop the array and clear each interval.
for (var i=0; i<myIntervalArray.length; i++)
clearInterval(myIntervalArray[i]);
}
Umm, wouldn't t only be defined when the if part ran... as far as I can tell, this is going to run and be done... the scope will be destroyed. If you need to maintain the scope across calls, you'll need to move your var statements outside of reposition(), like so:
$(document).ready(function() {
var t = 0;
...
function rePosition() { ... }
});
I have a bug in Javascript where I am animating the margin left property of a parent container to show its child divs in a sort of next/previous fashion. Problem is if clicking 'next' at a high frequency the if statement seems to be ignored (i.e. only works if click, wait for animation, then click again) :
if (marLeft === (-combinedWidth + (regWidth) + "px")) {
//roll margin back to 0
}
An example can be seen on jsFiddle - http://jsfiddle.net/ZQg5V/
Any help would be appreciated.
Try the below code which will basically check if the container is being animated just return from the function.
Working demo
$next.click(function (e) {
e.preventDefault();
if($contain.is(":animated")){
return;
}
var marLeft = $contain.css('margin-left'),
$this = $(this);
if (marLeft === (-combinedWidth + (regWidth) + "px")) {
$contain.animate({
marginLeft: 0
}, function () {
$back.fadeOut('fast');
});
} else {
$back.fadeIn(function () {
$contain.animate({
marginLeft: "-=" + regWidth + "px"
});
});
}
if (marLeft > -combinedWidth) {
$contain.animate({
marginLeft: 0
});
}
});
Sometimes is better if you create a function to take care of the animation, instead of writting animation code on every event handler (next, back). Also, users won't have to wait for the animation to finish in order to go the nth page/box.
Maybe this will help you:
if (jQuery) {
var $next = $(".next"),
$back = $(".back"),
$box = $(".box"),
regWidth = $box.width(),
$contain = $(".wrap")
len = $box.length;
var combinedWidth = regWidth*len;
$contain.width(combinedWidth);
var currentBox = 0; // Keeps track of current box
var goTo = function(n) {
$contain.animate({
marginLeft: -n*regWidth
}, {
queue: false, // We don't want animations to queue
duration: 600
});
if (n == 0) $back.fadeOut('fast');
else $back.fadeIn('fast');
currentBox = n;
};
$next.click(function(e) {
e.preventDefault();
var go = currentBox + 1;
if (go >= len) go = 0; // Index based, instead of margin based...
goTo(go);
});
$back.click(function(e) {
e.preventDefault();
var go = currentBox - 1;
if (go <= 0) go = 0; //In case back is pressed while fading...
goTo(go);
});
}
Here's an updated version of your jsFiddle: http://jsfiddle.net/victmo/ZQg5V/5/
Cheers!
Use a variable to track if the animation is taking place. Pseudocode:
var animating = false;
function myAnimation() {
if (animating) return;
animating = true;
$(this).animate({what:'ever'}, function() {
animating = false;
});
}
Crude, but it should give you the idea.
Edit: Your current code works fine for me as well, even if I jam out on the button. On firefox.