Develop Reference

How to animate nested content when animated parent slide moves into viewport, not using scroll

I'm looking to use javascript to animate the content of a nested DIV within an parent slide when the parent slide moves into the viewport.
At the moment, the content in the nested DIV only animates once a scroll command is also triggered after the parent slide moves onto the screen. I believe this is because the slide motion is animated and not scroll controlled.
The same issue is at play in this JSFiddle demo I created to explore the issue:
http://jsfiddle.net/9dz3ubL1/
(The animated movement of the slide from right to left in this demo has been created to test for this problem, to replicate the motion of the slide without scrolling; it is not actually a feature of the development proper).
My question is, how can I script for the animations to be triggered for each nested DIV, when each slide element moves into the viewport, without requiring a scroll function?
Thanks for any help. Here's the script I'm using to control opacity and other CSS stylings.
$(document).ready(function() {
/* Every time the window is scrolled ... */
$(window).scroll(function() {
/* Reveal hidden_header delayed */
$('.hidden_header').each(function(i) {
var center_of_object = $(this).offset().left + $(this).outerWidth();
var center_of_window = $(window).scrollLeft() + $(window).width();
/* If the object is completely visible in the window, fade it it */
if (center_of_window > center_of_object) {
$(this).animate({
'opacity': '1'
}, 500);
$(this).animate({
'right': '0'
}, 1500);
}
});
/* Reveal hidden_content delayed */
$('.hidden_content').each(function(i) {
var center_of_object = $(this).offset().left + $(this).outerWidth();
var center_of_window = $(window).scrollLeft() + $(window).width();
/* If the object is completely visible in the window, fade it it */
if (center_of_window > center_of_object) {
$(this).animate({
'opacity': '1'
}, 3000);
$(this).animate({
'bottom': '0'
}, 3500);
}
});
/* Reveal button delayed */
$('.button').each(function(i) {
var center_of_object = $(this).offset().left + $(this).outerWidth();
var center_of_window = $(window).scrollLeft() + $(window).width();
/* If the object is completely visible in the window, fade it it */
if (center_of_window > center_of_object) {
$(this).animate({
'opacity': '1'
}, 5000);
}
});
});
});

If your slide motion is animated fully (not incremental as it is in the jsfiddle you linked) then jQuery provides you with the ability to perform an action after your animation is complete.
http://api.jquery.com/animate/
Look at the options you can use for the animation function. One of them is called done. You can assign a function to the done option and that function will be called when your animation is complete.
Using one of your animates as an example, the syntax may look like this:
$(this).animate({
'opacity': '1'
}, {duration: 3000, done: function () {
//animate some stuff here
}};
Note that I just picked a random animation from your code. I'm not sure exactly when you want to perform the animation of the content, but you can use this technique anywhere you use a jQuery animate.
I've used this before to control nested animations in a slideshow format and it has worked very well! I hope this what you wanted.

Scroll Up/Down want to slide in parts not in once

I am using a slider on my web page for that i used jQuery Function
to scroll down
jQuery("#downClick").click(function() {
jQuery("html, body").animate({ scrollTop: jQuery(document).height() }, "slow");
});
to scroll up
jQuery("#upClick").click(function(){ //Click event to scroll to top ==>> Slider
jQuery('html, body').animate({scrollTop : 0},800);
return false;
});
My page is having too much data to display, so when a person clicks on this buttons either he navigates to bottom or top in once.
Does anybody can suggest me how can i change to something like if i want to scroll up it will scroll up with multiple steps not in once.

$('#upClick').on('click', function() {
var scrollIndex = $(window).scrollTop(); // current page position
$(window).scrollTop(y - 150); // scroll up 150px
}
refer this!

How to scroll in jQuery with an animation?

I want to scroll my page 1750px from the top with an animation. I tried the following and it doesn't work.
$('#trailer').click(function() {
event.preventDefault();
//$(window).scrollTop(1750); // I want to animate this.
$(window).animate(
{top: 1750},
200);
return false;
});

You need to use scrollTop instead of top and you have to call animate on the body (or both html and body depending on the browser):
$('html, body').animate({
scrollTop: 1750
}, 200);
Fiddle

Jquery animate created element

I made div, if i click on it, jquery makes bullet and that element is animated. This is code:
$('.square').click(function() {
$('<div class="bullet"></div>').appendTo($('body')).animate({
'margin-top': 554
}, 2000, function() {
$(this).remove();
});
});
It works properly when I'm not clicking second time on div before animation is done. If i do this, my second "bullet" starts animation from position of first.
How to fix that? Thank's for help :)
UPDATE##
Here's the jsfiddle with problem:
https://jsfiddle.net/2ghj1x45/

it's because the elements all have a size because they aren't positioned absolutely so each bullet div you add has display block, so will get it's own line where it's height is bullet size + margin top , which increases as it's animated. try instead using position absolute so the bullet div doesn't affect the layout of any other div
like so
$(bullet).animate({ top: value });

Why not timeout the click function with a variable:
var animating = false;
$('.square').click(function() {
if(!animating) {
animating = true;
setTimeout(function() {
animating = false;
}, 2000);
$('<div class="bullet"></div>').appendTo($('body')).animate({
'margin-top': 554
}, 2000, function() {
$(this).remove();
});
}
});
EDIT:
Updated JSfiddle

jQuery scroll down to new dynamic element, then slideDown to see the effect of new element

Using jQuery 1.10. I have the following:
$('html, body').animate({
scrollTop: $("#copyright").offset().top
}, 500);
$("<%= j(render 'shop') %>").hide().appendTo($("#shops")).slideDown("fast");
What it does is scroll down to the end of the page, then the new element is appended. But while it's scrolling, the new element is already slideDown.
Questions:
I want the user to be scrolled down to the bottom of the page, then see the new element slideDown to create a UX feeling that new element is created.
Bonus: You notice I scroll to #copyright which is at the footer instead. Actually I want it to scroll to the exact position where the new element will be appended (usually there are many shops, it will be appended after the last shop.
Note: These two lines of code are working, just need to tweak a little.
Thanks.

did you try this:
$('html, body').animate({
scrollTop: $("#copyright").offset().top
}, 500, function(){
$("<%= j(render 'shop') %>").hide().appendTo($("#shops")).slideDown("fast");
});

First you can use done to know when the animate is done
look at the animate example:
$( "p" ).animate({
height: 200,
width: 400,
opacity: 0.5
}, 1000, "linear", function() {
alert( "all done" );
});
please look at the following example:
http://api.jquery.com/animate/
The function in the end is the done event
in addition you can detect when is user reach specific element in order to start your animation
you can use something like this:
jQuery(
function($)
{
$('#flux').bind('scroll', function()
{
if($(this).scrollTop() +
$(this).innerHeight()
>= $(this)[0].scrollHeight)
{
alert('end reached');
}
})
}
);