Develop Reference

Javascript button appear animation

I have the back to top button that appears when you reach a point on the page, which is working fine, however, when it appears the text is on two lines until the box has finished the animation to appear. So, is there anyway to prevent this? What I mean by the animation is: btt.show('slow');
Code:
$(document).ready(function () {
var btt = $('.back-to-top');
btt.on('click' , function(e) {
$('html, body').animate({
scrollTop: 0
}, 500);
btt.hide('slow');
e.preventDefault();
});
$(window).on('scroll', function () {
var self = $(this),
height = self.height(),
top = self.scrollTop();
if (top > 500) {
btt.show('slow');
} else {
btt.hide('slow');
}
});
});
Example: http://codepen.io/Riggster/pen/WvNvQm

The problem is caused by animating the width of a box, I think it might be better to animate the position of it instead, but - even better - lets use CSS animations!
$(window).on('scroll', function () {
if ($(window).scrollTop() >= 500) {
$(".button").addClass('show');
} else {
$(".button").removeClass('show');
}
});
#wrapper {
width: 100%;
height: 2000px;
}
.button {
position: fixed;
bottom: 50px;
right: -100px;
/* You might still need prefixes here. Use as preferred. */
transition: right 500ms;
}
.button.show {
right: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.0/jquery.min.js"></script>
<div id="wrapper">
<div class="button">Here's my button!</div>
</div>
I've defined your button as hidden by default, by giving it a position of right: -100px. When we hit the correct scroll position, we add the class show and that triggers the animation performed by CSS and not javascript, as we have the transition property for the property right defined - that way the browser does the heavy lifting.

Toggling show/hide alters your elements width. You either have to put it in a container with display: inline
Or more ideally you might want to change show/hide to jQuery fadeIn() / fadeOut() which is more appropriate for "Back to Top" indicators.
Here is your codepen example modified with inline container:
http://codepen.io/anon/pen/MwWweY

jQuery slide animation on existing divs after prependTo

I have this semi-slider-style UI where new terms are added in from the left: http://jsfiddle.net/v4v5cvkz/. I'm using the jQuery prependTo function to do this. My issue is that I want the terms that are already displayed to perform an animated slide to the right when a new term gets added, rather than suddenly "appear" in the correct position. I did try adding a "displayed" class to terms that had successfully shown up, and tried adding a slide-to-right animation after that, but that didn't quite achieve the effect I was going for (the "displayed" objects were moved much further to the right than I expected).
Here is the problematic code (you'll probably want to view the fiddle to see it in context though):
function addToStream(term, delay) {
setTimeout(function(){
$("<div />")
.addClass("stream_term")
.html(term)
.css({
opacity: 0
})
.prependTo("#stream_terms")
.animate({opacity:1},
{ duration: 1000,
complete: function() {
$(this).addClass("displayed");
}
});
}, delay);
}
Any help here would be greatly appreciated. Thank-you!
*Note: I have access to jQuery UI in my code, though it isn't linked in the fiddle. Also, if anyone knows of a plugin that can do this sort of thing better than I can, please let me know. The closest one I was able to find was Fraction Slider, but I didn't find it obvious how to create a similar UI with it (it might also be overkill for my purposes).

Here's a way to do it:
function addToStream(term, delay) {
setTimeout(function(){
var newDiv = $("<div />");
newDiv.addClass("stream_term")
.html(term)
.css({
opacity: 0,
display: 'none'
}).prependTo("#stream_terms");
var width = newDiv.width();
var height = newDiv.height();
newDiv.css({
width: 0,
height: height,
display: 'inline-block'
})
.animate({
width: width,
margin: '0 10px',
padding: '5px 10px'
}, 1000)
.animate({opacity: 1}, 1000, function(){
$(this).addClass("displayed");
});
}, delay);
}
It also needs the following CSS changes:
.stream_term {
padding: 0;
margin: 0;
overflow: hidden;
}
DEMO: http://jsfiddle.net/StathisG/hqg29p6r/1/

How to create a floating div with jQuery

When the mouse is over an element A of a certain class , another floating div B, which contains a link, should appear. B should disappear as soon as the mouse has left A and B.
How can I do this with jQuery?
jsFiddle
var container = $('#container');
var area = $('.area'); // this is A
var position = area.offset();
var floating = $("<div />", {
css : { "position" : "absolute",
"top" : position.top - 30,
"left" : position.left + 20,
"border" : "1px solid #000",
"padding" : "5px",
"display" : "none",
"z-index" : "100",
"background-color" : "#F00"
}
})
.text('Hello World'); // this is B
container.css('position', 'relative');
container.append(floating);
function show() {
floating.show();
}
function hide() {
floating.hide();
}
area.on('mouseenter', show);
area.on('mouseleave', hide);
floating.on('mouseenter', function(event) {
console.log("floating: mouseenter");
area.off('mouseenter', show);
area.off('mouseleave', hide);
});
floating.on('mouseleave', function(event) {
console.log("floating: mouseleave");
area.on('mouseenter', show);
area.on('mouseleave', hide);
});
My problem is that evertime the mouse enters B, B disappears already. I need to do this with jQuery, not only CSS.

I'm not sure why you have to put the floating div in the jQuery. This is probably how I would achieve something similar to what you want.
http://jsfiddle.net/A2gFb/6/
Just put the hidden float in the HTML,
<div class="area">luptatum zzril
<div class="fixed">Hello World!</div>
</div>
with proper CSS set.
.area {
position: relative;
color: #0F0;
font-weight: bold;
/* you may want to set the width/height here as well*/
}
.fixed {
position: absolute;
top: 20px;
left: 20px;
border: 1px solid black;
padding: 5px;
z-index: 100; /* Thanks Diego for pointing out the typo here */
background-color: red;
display: none;
}
And the jQuery would be as simple as this:
$(".area").mouseenter( function() {
$(".fixed").show();
});
$(".area").mouseleave( function() {
$(".fixed").hide();
});

The major problem you are having is that the mouseleave event for your green text is firing before the mouseenter for your floating div. To fix this I made a variable to track the mouse being in the float and used a setTimeout in the hide() function to check for this variable after 100 ms. You could probably go lower if you were worried about the delay. Here's the fiddle.
At the top of the javascript:
var inFloat = false;
The hide() function becomes:
function hide() {
setTimeout(function(){
if (!inFloat)
floating.hide();
},100);
}
And your floating mouse events become:
floating.on('mouseenter', function(event) {
inFloat = true;
});
floating.on('mouseleave', function(event) {
inFloat = false;
floating.hide();
});
You still have the issue that the floating div has a fixed position that isn't related to the mouse position, so it may be awkward to hover over the link and then move to floating div at times.

just add:
floating.on('mouseenter', show);
floating.on('mouseleave', hide);
it works on jsFiddle.
By the way, I suggest you to not use "show" and "hide" as function name since they already exist in jQuery. showTooltip and hideTooltip can be good names.

Jquery, slideup() but do not remove element

I've got an app that looks like a Windows desktop. There are icons that open draggable windows (divs) which display the content.
When I close a window, this happens:
$('#element'+boxId).animate({height: 0, opacity: 0}, 'fast');
When I open a window, this happens
$('#element'+boxId).slideDown();
Problem is, once a window is closed, I cannot reopen it. If I want to see that window again I have to refresh the page and then open it.
Is there some way to do a cool fade out that does not completely remove the element?
I have also tried regular old slideUp() but that does the same thing.
This works fine, just not as cool looking.
document.getElementById('element'+boxId).style.display = "none";

The problem is that you are hiding it by affecting the height and opacity, and those aren't being reset by the slideDown. Here's one option:
http://jsfiddle.net/uggVb/
$('#hide').click(function (e) {
e.preventDefault();
var $div = $('#theDiv');
$div.data('originalHeight', $div.css('height'));
$('#theDiv').animate({
height: 0,
opacity: 0
}, 'fast');
//$('#theDiv').slideUp('fast');
});
$('#show').click(function (e) {
e.preventDefault();
$('#theDiv').animate({
height: $('#theDiv').data('originalHeight'),
opacity: 1
}, 'fast');
//$('#theDiv').slideDown('fast');
});
You could use the slide functions instead of the animate functions, either work.

How about only using jQuery to add and remove a hide class and use CSS transitions for the properties you want to animate?
jQuery:
$('#whatever').click(function(ev) {
var $el = $('#element' + boxId);
$el.toggleClass('hide');
});
CSS:
#element { /* or #element{{boxId}} or some class added to those elements */
opacity: 1;
overflow: hidden;
width: 100px; height: 100px;
transition: height 300ms, opacity 300ms;
}
#element.hide {
opacity: 0;
height: 0;
}
See demo

Not sure if it is what you want but you can look into jQuery hide/show functions
$('#element'+boxId).hide();
if you want slower/faster animation you can give hide parameter which represents animation speed(in miliseconds)
$('#element'+boxId).hide(1000);

Possible to toggle/animate between two sizes using jQuery?

Basically I have a small div that is initially styled to 60x60. I have created click event that animates the expansion of the div:
$("#myDiv").click(function () {
$(this).animate(
{
width: "350px",
height: "300px"
}, 500);
}
I would like to reverse this animation if someone clicks the div again. Is there anyway to toggle between the original size and the expanded size (still using the animate function) with each click?
I found the toggleClass function but I don't think this will work with animiate.
You can see a basic fiddle here: http://jsfiddle.net/NS9Qp/

$("#myDiv").toggle(function() {
$(this).stop().animate({
width: "350px",
height: "300px"
}, 500);
}, function() {
$(this).stop().animate({
width: "60px",
height: "60px"
}, 500);
});
Example.
The jQuery toggle() function allows you to define two or more functions to cycle through on each mouse click. In this case, the first one (triggered on the first click) expands the div and the second one (triggered on the second click) resets it. On the third click, it starts back at the first one, and so on.
More about toggle() here.

just to be different :
var size=[];
$("#cornerBox").click(function(){
$(this).width() >= 350 ? size=[60, 60] : size=[350, 300];
$(this).stop().animate({ width: size[0], height: size[1] },500);
});
Fiddle: http://jsfiddle.net/NS9Qp/1/

I ended up using jQuery UI's animated toggleClass effect: http://jqueryui.com/demos/toggleClass/
super simple code:
$('h2').click(function() {
$(this).next().toggleClass("hidden", 1000);
});

Do not hardcode css styles (in my example I used inline css for myDiv element, put this in css files).
<div id="myDiv" style="background:red; width: 60px; height: 60px;"></div>
<script type="text/javascript">
var div = $('#myDiv');
div
.attr('defWidth', div.width())
.attr('defHeight', div.height())
.toggle(function() {
$(this).stop().animate({width: "350px", height: "300px"}, 500);
}, function() {
$(this).stop().animate({width: $(this).attr('defWidth'), height: $(this).attr('defHeight')}, 500);
}
);
</script>

What I do for cases like this, is store a transformation array.
var transforms = { 'height0': 60, 'width0': 60, 'height1': 300, 'width1': 350};
Then, store a toggle between 0 or 1, and use the corresponding values for the animation.
EDIT: combine this with the previous example of toggle, and you've got yourself a solid working solution!