Develop Reference

jQuery: Animate Removal of Style Attribute from Multiple divs

I have ~33 divs that I am setting the position of randomly and animating this places. These divs are originally positioned with the help of flex and then the positions are randomized by setting their positions to relative and changing the left and top values. This happens every click.
On every alternate click, I want to return the divs to their normal position. So far the only solution to this I've found is the .removeAttr('style') method. However, I want to be able to animate their return to original position. Is this possible?
Here is the code:
var position_checker = false;
$(document).click(function() {
if(position_checker == false) {
$('.poster05-text').each(function() {
var position = $(this).offset();
$(this).css({
position: 'relative',
}, position);
var docHeight = $(document).height(),
docWidth = $(document).width(),
divWidth = 500,
divHeight = 500,
heightMax = docHeight - divHeight,
widthMax = docWidth - divWidth;
var posLeft = Math.floor(Math.random() * widthMax);
var posTop = Math.floor(Math.random() * heightMax);
// console.log(docHeight, docWidth);
$(this).animate({
position: 'fixed',
left: posLeft,
top: posTop
}, 1000 , 'easeInQuint');
});
position_checker=true;
}
else if(position_checker==true) {
$('.poster05-text').each(function() {
$(this).removeAttr('style');
});
position_checker=false;
}
});

I don't know this a right way to do that or not .. but anyway .. you need to save the previous left and top positions for each div on array
var position_checker = false , T_L_Positions = [];
$(document).click(function() {
if(position_checker == false) {
$('.poster05-text').each(function(i) {
var position = $(this).offset();
$(this).css({
position: 'relative',
}, position);
T_L_Positions[i] = new Array(position.top ,position.left);
var docHeight = $(document).height(),
docWidth = $(document).width(),
divWidth = 500,
divHeight = 500,
heightMax = docHeight - divHeight,
widthMax = docWidth - divWidth;
var posLeft = Math.floor(Math.random() * widthMax);
var posTop = Math.floor(Math.random() * heightMax);
// console.log(docHeight, docWidth);
$(this).animate({
position: 'fixed',
left: posLeft,
top: posTop
}, 1000 , 'easeInQuint');
});
position_checker=true;
}
else if(position_checker==true) {
$('.poster05-text').each(function(i) {
$(this).animate({
position: 'relative',
left: T_L_Positions[i][1],
top: T_L_Positions[i][0]
}, 1000 , 'easeInQuint');
});
position_checker=false;
}
});
Note: This Code Not Tested .. but you can try it
maybe you'll need to wrap your code in $(document).ready(function(){ //code here })

If you're looking for a non-JS solution. You should be able to use CSS Transitions to do this.
transition: top 500ms, left 300ms;
That way you can just set and remove the position and let CSS deal with the animation.
For more information check out these examples:
https://www.w3schools.com/css/css3_transitions.asp
https://css-tricks.com/almanac/properties/t/transition/

Building an animated menu with Jquery that responds to page scrolling

Sorry for the terrible title, but I'm not sure how else to describe what I'm trying to build. I'm using some code I found on this site, basically what I'm trying to do is build a left handed navigation menu, that highlights the appropriate section as the user scrolls to it.
$(document).ready(function() {
var topRange = 200, // measure from the top of the viewport to X pixels down
edgeMargin = 20, // margin above the top or margin from the end of the page
animationTime = 600, // time in milliseconds
contentTop = []; //array of sidebar links
$('nav ul').append('<div id="slider"></div>');
var sliderTop = $("nav ul li a").eq(0).parent().position().top;
var sliderLeft = $("nav ul li a").eq(0).parent().position().left;
var sliderHeight = $("nav ul li a").eq(0).parent().outerHeight();
$('#slider').css({
'height': sliderHeight,
'left': sliderLeft,
'top': sliderTop,
'width': '100%'
});
// Stop animated scroll if the user does something
$('html,body').bind('scroll mousedown DOMMouseScroll mousewheel keyup', function(e) {
if (e.which > 0 || e.type == 'mousedown' || e.type == 'mousewheel') {
$('html,body').stop();
}
})
// Set up content an array of locations
$('#sidebar').find('a').each(function() {
contentTop.push($($(this).attr('href')).offset().top);
})
// Animate menu scroll to content
$('#sidebar').find('a').click(function() {
var sel = this,
newTop = Math.min(contentTop[$('#sidebar a').index($(this))], $(document).height() - $(window).height()); // get content top or top position if at the document bottom
$('html,body').stop().animate({
'scrollTop': newTop
}, animationTime, function() {
window.location.hash = $(sel).attr('href');
});
return false;
})
//scroll function
function scroller() {
var winTop = $(window).scrollTop(),
bodyHt = $(document).height(),
vpHt = $(window).height() + edgeMargin; // viewport height + margin
$.each(contentTop, function(i, loc) {
if ((loc > winTop - edgeMargin && (loc < winTop + topRange || (winTop + vpHt) >= bodyHt))) {
//animate slider
x = $("#sidebar li").eq(i).position();
$("#slider").animate({
top: (x.top)
}, 100);
}
})
}
//scroll event handler
$(window).scroll(scroller)
})
I have most of it working, however when you actually click a link on the menu the animation is very slow to catch up with the actual scrolling. I understand why this is happening, because it updates the position one at a time after each section is reached, but I'm wondering if there's a way to make this animation faster, and more fluid. I've attached a fiddle with my code, thank you in advance for your help!
http://jsfiddle.net/jamesmyers/6mbmq1pe/

You will get a better slider animation effect by temporarily detaching the scroll handler and scrolling the slider directly, with the same animationTime as for the main animation.
To do this, you also need to :
namespace the scroll event .nav, to allow safe use of .off()
stop() the slider animation in the "if the user does something" block
I've also included a few efficiency savings in the way contentTop and #slider are set up but these are not actually necessary.
$(document).ready(function() {
var topRange = 200, // measure from the top of the viewport to X pixels down
edgeMargin = 20, // margin above the top or margin from the end of the page
animationTime = 600, // time in milliseconds
contentTop, //array of sidebar links
navLinkWrapper = $("nav ul li a").eq(0).parent();
var $slider = $("<div id=\"slider\" />").css({
'height': navLinkWrapper.outerHeight(),
'left': navLinkWrapper.position().left,
'top': navLinkWrapper.position().top,
'width': '100%'
}).appendTo($('nav ul'));
// Stop animated scroll if the user does something
$('html,body').on('scroll mousedown DOMMouseScroll mousewheel keyup', function(e) {
if (e.which > 0 || e.type == 'mousedown' || e.type == 'mousewheel') {
$('html,body').stop();
$slider.stop(); //<<<<<<<
}
});
// Set up content an array of locations
contentTop = $('#sidebar a').map(function() {
return $($(this).attr('href')).offset().top;
});
// Animate menu scroll to content
$('#sidebar a').on('click', function(e) {
e.preventDefault();
$(window).off('scroll.nav', scroller); //<<<<<<<
$slider.stop().animate({ //<<<<<<<
top: ($(this).closest("li").position().top) //<<<<<<<
}, animationTime); //<<<<<<<
var sel = this,
newTop = Math.min(contentTop[$('#sidebar a').index($(this))], $(document).height() - $(window).height()); // get content top or top position if at the document bottom
$('html,body').stop().animate({
'scrollTop': newTop
}, animationTime, function() {
window.location.hash = $(sel).attr('href');
$(window).on('scroll.nav', scroller); //<<<<<<<
});
});
//scroll function
function scroller() {
var winTop = $(window).scrollTop(),
bodyHt = $(document).height(),
vpHt = $(window).height() + edgeMargin; // viewport height + margin
$.each(contentTop, function(i, loc) {
if ((loc > winTop - edgeMargin && (loc < winTop + topRange || (winTop + vpHt) >= bodyHt))) {
//animate slider
$slider.animate({
top: ($("#sidebar li").eq(i).position().top)
}, 100);
}
});
}
//scroll event handler
$(window).on('scroll.nav', scroller); //<<<<<<<
});
Updated fiddle

jQuery scrollTop being buggy

I'm trying to make a sub navigation menu animate a fixed position change after a user has scrolled down 200 pixels from the top. It works but it's very buggy, like when the user scrolls back to the top it doesn't always return to the original position, etc. I'm not strong with javascript / jquery, but I thought this would be simple to do. What am I missing?
Here's my fidde:
http://jsfiddle.net/visevo/bx67Z/
and a code snippet:
(function() {
console.log( "hello" );
var target = $('#side-nav');
var scrollDis = 200;
var reset = 20;
var speed = 500;
$(window).scroll(function() {
console.log( $(window).scrollTop() );
if( $(window).scrollTop() > scrollDis ) {
$(target).animate({
top: reset + 'px'
}, speed);
} else {
$(target).animate({
top: scrollDis + 'px'
}, speed);
}
});
})();

How about a little bit of css and jquery both ??
What I did is added transition to side-nav to animate it and rectified your js to just change it's css. You can set how fast it moves by changing the time in transition.
FIDDLE
#side-nav {
position: fixed;
top: 100px;
left: 10px;
width: 100px;
background: #ccc;
-webkit-transition:all 0.5s ease-in-out;
}
(function () {
var target = $('#side-nav');
var scrollDis = 100;
var reset = 20;
var speed = 500;
$(window).scroll(function () {
if ($(this).scrollTop() >= scrollDis) {
target.css("top", reset);
} else {
target.css("top", scrollDis);
}
});
})();
NOTE: When you cache a jQuery object like this
var target = $("#side-nav");
You don't need to use $ again around the variable.

Since I am commenting all over the place I should probably actually contribute an answer.
The issue is that you are adding scroll events every time a scroll occurs, which is causing more scrolling to occur, which causes more scroll events, hence infinite loop. While cancelling previous events will fix the problem, it's cleaner to only fire the event when you pass the threshold, IE:
(function () {
console.log("hello");
var target = $('#side-nav');
var scrollDis = 200;
var reset = 20;
var speed = 500;
var passedPosition = false;
var bolMoving = false;
$(window).scroll(function () {
if (bolMoving) return; // Cancel double calls.
console.log($(window).scrollTop());
if (($(window).scrollTop() > scrollDis) && !passedPosition) {
bolMoving = true; //
$(target).animate({
top: reset + 'px'
}, speed, function() { bolMoving = false; passedPosition = true; });
} else if (passedPosition && $(window).scrollTop() <= scrollDis) {
bolMoving = true;
$(target).animate({
top: scrollDis + 'px'
}, speed, function() { bolMoving = false; passedPosition = false; });
}
});
})();
http://jsfiddle.net/bx67Z/12/

http://jsfiddle.net/bx67Z/3/
I just added .stop() in front of the .animate() , and it works a lot better already.
$(target).stop().animate({
top: reset + 'px'
}, speed);
} else {
$(target).stop().animate({
top: scrollDis + 'px'
}, speed);
You can also use .stop(true)
http://jsfiddle.net/bx67Z/5/
$(target).stop(true).animate({
top: reset + 'px'
}, speed);
} else {
$(target).stop(true).animate({
top: scrollDis + 'px'
}, speed);
You can also use .stop(true, true)
http://jsfiddle.net/bx67Z/4/
$(target).stop(true, true).animate({
top: reset + 'px'
}, speed);
} else {
$(target).stop(true, true).animate({
top: scrollDis + 'px'
}, speed);
So the reason .stop(true) works so well, is that it clears the animation queue. The reason yours was being "buggy" is because on every scroll the animation queue was "bubbling up" , thus it took a long time for it to reach the point where it would scroll back to the original position.
For information about .stop() , see here http://api.jquery.com/stop

Change menu option width with jQuery

I have got a menu on my homepage and on hover I would like them to enlarge. This is exactly what I have achieved, except there is one flaw:
When I move off before the animation ends, the option stops the animation and subtracts 30 from the width that left off from the previous animation. So it always intersects with the other animation and causes false results.
Example:
I move quickly to menu option 1, it only expands little - let's say by 10px - while I am on it, and as I move off the width decreases by 30px, which is more than the previously moved 10px, which results in a smaller button overall.
I would like to somehow capture how much it has moved during the mouseover animation and only decrease the width in the leaving function by that amount. Or, of course some other easy solution, if there is one...
Here's the code:
$('.menu_option').hover(
function() {
var w = $(this).width()+30+"";
$(this).stop().animate({ width:w}, 150, 'easeOutQuad');
}, function() {
var w = $(this).width()-30+"";
$(this).stop().animate({ width:w}, 150, 'easeOutQuad');
});

What you can do is make another variable which is the origin width then when you put it back go back to the origin:
js:
var o = $('.menu_option').width();
$('.menu_option').hover(function () {
var w = $(this).width() + 30 + "";
$(this).stop().animate({
width: w
}, 150, 'easeOutQuad');
}, function () {
$(this).stop().animate({
width: o
}, 150, 'easeOutQuad');
});
http://jsfiddle.net/Hive7/qBLPa/6/

You need to complete the previous animation before the width is calculated
$('.menu_option').hover(function () {
var $this = $(this).stop(true, true);
var w = $this.width() + 30;
$this.animate({
width: w
}, 150, 'easeOutQuad');
}, function () {
var $this = $(this).stop(true, true);
var w = $this.width() - 30 + "";
$this.animate({
width: w
}, 150, 'easeOutQuad');
});
Demo: Fiddle

position:fixed navigation stop at end of specific div - parallax scrolling & javascript

I have a vertically oriented vertical navigation bar, that I would like to make stop at the end of #contact. It will need to resume scrolling again if the user scrolls back up.
What is the best way to achieve this?
javascript being used:
$(function() {
$.fn.scrollBottom = function() {
return $(document).height() - this.scrollTop() - this.height();
};
var $el = $('#nav>div');
var $window = $(window);
var top = $el.parent().position().top;
$window.bind("scroll resize", function() {
var gap = $window.height() - $el.height() - 10;
var visibleFoot = 340 - $window.scrollBottom();
var scrollTop = $window.scrollTop()
if (scrollTop < top + 10) {
$el.css({
top: (top - scrollTop) + "px",
bottom: "auto"
});
} else if (visibleFoot > gap) {
$el.css({
top: "auto",
bottom: visibleFoot + "px"
});
} else {
$el.css({
top: 0,
bottom: "auto"
});
}
}).scroll();
});
jsfiddle

I believe this is the code you are looking for:
$(function() {
var $Nav = $('#Nav');
var $window = $(window);
var $contact = $('#contact');
var maxTop = $contact.offset().top + $contact.height() - $Nav.height();
window.navFixed = 1;
$window.bind("scroll resize", function() {
var currentTop = $window.scrollTop();
if (currentTop <= maxTop && window.navFixed == 0) {
$Nav.css({
position: 'fixed',
top: '5%'
});
window.navFixed = 1;
} else if (currentTop > maxTop && window.navFixed == 1) {
$Nav.css({
position: 'absolute',
top: maxTop
});
window.navFixed = 0;
}
}).scroll();
});
The #Nav element contains the CSS you had originally specified: position: fixed; top: (...). When the document is ready, the variable maxTop is calculated based on the #contact element's top and height.
On the scroll and resize event, the variable currentTop is calculated as the current scroll position. If this value is lower than maxTop, then #Nav is set to the original CSS; if the value is higher, new CSS styles are applied: position: absolute; top: maxTop;
window.navFixed is used to prevent the CSS to be constantly updated while scrolling. I'm sure that bit can be improved, however, it demonstrates its purpose.
Check out the JSFiddle for the full HTML..
PS. There's a minor bug in your code, where #Nav refers to the <ul> element, rather than the <nav> element. However, the moving element is the <ul>, when it should be <nav>.