Develop Reference

Don't ng-show element until ng-hide CSS transition is complete?

Simple question, but I'm having implementation troubles. If I have the following DOM setup:
<h1 class="fade" ng-repeat="child in parent.children" ng-show="parent.activeChild== child ">#{{ child.title }}</h1>
When the activeChild property of the parent model changes, how can I fade out the currently active child, before the model changes, and then fade in the newly active child post-change.
I have it working roughly, with just CSS transitions using this:
.fade.ng-hide-add {
transition:opacity 1s ease;
}
.fade.ng-hide-remove {
transition:opacity 1s ease 1s;
}
.fade.ng-hide-add {
opacity:1;
&.ng-hide-add-active {
opacity:0;
}
}
.fade.ng-hide-remove {
opacity:0;
&.ng-hide-remove-active {
opacity:1;
}
}
But, this ends up producing this problem (Plunkr):
Essentially, I want to chain my animation. I've tried reading the ng-animate docs, but I'm having trouble the syntax necessary to deliver the effect I want.
I've seen the Angular docs have something like this:
app.animation('.fade', [function() {
return {
addClass: function(element, className, doneFn) {
},
removeClass: function(element, className, doneFn) {
}
};
}]);
What is className? Is it the class I want to apply while fading in/out? The class I'm expecting?
What is doneFn meant to be? I assume it's a function that's run once the animation is complete? What goes in there?
What do I do in the addClass and removeClass function then, if I already have a doneFn?
The Goal
I'd like to generate a working animation directly using Angular's ngAnimate module, with either CSS or JS. How can I achieve this?

Why do you use a separate <h1> for each heading. You can use a single <h1> tag to show your heading.
I have created a demo for your problem and I have successfully done your requirement.
Updated
Note, codes are edited to use ngAnimate module. When you use ngAnimate module, it will create a class .ng-hide when you hide an element,
Here is the controller for your app,
app2.controller("testController", ["$scope", "$timeout", function ($scope, $timeout) {
$scope.heading = {};
$scope.heading.show = true;
$scope.parent = {};
$scope.parent.children = ["A", "B", "C", "D"];
$scope.parent.activeChild = "A";
$scope.changeHeading = function (child) {
$timeout(function () {
$scope.parent.activeChild = child;
$scope.heading.show = true;
}, 1000);
}
}]);
And your html page should be look like this,
<div ng-controller="testController">
<h1 class="myAnimateClass" ng-show="heading.show" ng-class="{fadeIn : heading.fadeInModel==true, fadeOut : heading.fadeOutModel}"> {{parent.activeChild}} </h1>
<p ng-repeat="child in parent.children" ng-click="heading.show = false;changeHeading(child)">{{child}}</p>
</div>
And I have used CSS3 to implement the fade in and fade out animation,
.myAnimateClass {
-webkit-transition: opacity 1s ease-in-out;
-moz-transition: opacity 1s ease-in-out;
-o-transition: opacity 1s ease-in-out;
-ms-transition: opacity 1s ease-in-out;
transition: opacity 1s ease-in-out;
opacity:1;
}
.myAnimateClass.ng-hide {
opacity: 0;
}
Explanation
To achieve your requirement, I have used ng-class and $timeout in angularJS.
You can see that, I have only one <h1> tag to display your heading. When I change the heading I just change it's binding property $scope.parent.activeChild.
And I have used two scope variables $scope.heading.fadeOutModel and $scope.heading.fadeInModel to add and remove classes fadeIn and fadeOut dynamically.
When user clicks to change the heading, I have added the class fadeOut to your heading. So, this will show an animation of fade out. And also I have fired a function in app.js, changeHeading().
You can see that, I forced the angular to wait for 1000 milliseconds to finish fade out animation. After this time, it will replace the selected heading to new one and add a class fadeIn. So, it will start animation for fade in.
Hope this will help you !!!

A more ng-animate way to show a specific element depending on a selection would be to use ngSwitch. This directive is used to conditionally swap DOM structure on your template based on a scope expression. Here is a example.
HTML
<button ng-repeat="item in items" ng-click="parent.selection = item">{{ item }}</button>
<div class="animate-switch-container" ng-switch on="parent.selection">
<div class="animate-switch" ng-switch-when="foo">foo</div>
<div class="animate-switch" ng-switch-when="bar">bar</div>
</div>
Javascript
$scope.items = ['foo', 'bar'];
$scope.parent = {
selection: $scope.items[0]
}
CSS
.animate-switch-container {
position:relative;
height:40px;
overflow:hidden;
}
.animate-switch {
padding:10px;
}
.animate-switch.ng-animate {
transition:opacity 1s ease;
}
.animate-switch.ng-leave.ng-leave-active,
.animate-switch.ng-enter {
opacity: 0;
}
.animate-switch.ng-leave,
.animate-switch.ng-enter.ng-enter-active {
opacity: 1;
}
This is not chaining, but it is a working animation directly using Angular's ngAnimate module. Also here is a example of it on angular's website.

You can use .animation to define animations that are Javascript based. For example, the functions you define as the values of addClass and removeClass
app.animation('.fade', [function() {
return {
addClass: function(element, className, doneFn) {
},
removeClass: function(element, className, doneFn) {
}
};
}]);
are called by Angular when it detects that you are adding or removing a class from an element, from one of the methods:
{{ }} interpoation in a template. E.g. <span class="{{shouldFade ? 'fade' : ''}}">....
Using ng-class in a template. E.g. <span ng-class="{fade: shouldFade}">...
Using the $animate service in a directive. E.g. $animate.addClass(element, 'fade') or $animate.removeClass(element, 'fade')
What is className? Is it the class I want to apply while fading in/out? The class I'm expecting?
In this example it will be fade. It a bit strange admittedly as in the example it is already clear this is the class name involved. However, if in the same digest cycle you're adding multiple classes to the same element, then the concatenation of them are passed as this string.
What is doneFn meant to be? I assume it's a function that's run once the animation is complete? What goes in there?
It's a function that you call once whatever Javascript animation you define is done. For example, to define an animation that does nothing as all:
addClass: function(element, className, doneFn) {
doneFn();
},
Calling it tells Angular that the animation has complete. This will, among other things, remove the ng-animate class from the element.
What do I do in the addClass and removeClass function then, if I already have a doneFn?
You put in them some code, perhaps using timeouts or a 3rd party library, to change the element somehow. When you have finished, you call doneFn. For example, a 1 step opacity "animation":
addClass: function(element, className, doneFn) {
element.css('opacity', 0.5);
setTimeout(function() {
doneFn();
}, 1000);
},
I'd like to generate a working animation directly using Angular's ngAnimate module, with either CSS or JS.
This doesn't really have much to do with the answers above! If I were doing a real-case, I strongly suspect I would position the elements absolutely, as anything else (that I can think of) at least, is a bit overly complicated.
However, if you do really want to chain the animations using ngAnimate, one possible way is to use the fact that $animate.addClass and $animate.removeClass returns a promise when it completes. In order to chain onto the end of such a promise returned when hiding an element, it must be called from some sort of central location, and keep track of which element is visible, being hidden, and being shown.
A way of doing this is to use 2 custom directives. One will be on each element to show and hide, that could be used very much like ngShow. The other will be a parent directive that will allow only one element to be visible at any time, and chain removal of the ng-hide class (and associated animations) after any addition of ng-hide. The directives will have to communicate, could be called something like ngShowUnique and ngShowUniqueController, such as in the following example.
<div ng-show-unique-controller>
<h1 class="fade" ng-repeat="child in parent.children" ng-show-unique="parent.activeChild == child">#{{child.title}}</h1>
</div>
and they could be implemented as below.
app.directive('ngShowUniqueController', function($q, $animate) {
return {
controller: function($scope, $element) {
var elements = [];
var expressions = [];
var watchers = [];
var unregisterWatchers = null;
var visibleElement = null;
function registerWatchers() {
unregisterWatchers = $scope.$watchGroup(expressions, function(vals) {
var newCurrentIndex = vals.indexOf(true);
var addPromise;
if (visibleElement) {
// Set a fixed height, as there is a brief interval between
// removal of this class and addition of another
$element.css('height', $element[0].getBoundingClientRect().height + 'px');
addPromise = $animate.addClass(visibleElement, 'ng-hide');
} else {
addPromise = $q.when();
}
visibleElement = elements[newCurrentIndex] || null;
if (!visibleElement) return;
addPromise.then(function() {
if (visibleElement) {
$animate.removeClass(visibleElement, 'ng-hide').then(function() {
$element.css('height', '');
});
}
})
});
}
this.register = function(element, expression) {
if (unregisterWatchers) unregisterWatchers();
elements.push(element[0]);
expressions.push(expression);
registerWatchers();
// Hide elements initially
$animate.addClass(element, 'ng-hide');
};
this.unregister = function(element) {
if (unregisterWatchers) unregisterWatchers();
var index = elements.indexOf(element[0]);
if (index > -1) {
elements.splice(index, 1);
expressions.splice(index, 1);
}
registerWatchers();
};
}
};
});
app.directive('ngShowUnique', function($animate) {
return {
require: '^ngShowUniqueController',
link: function(scope, element, attrs, ngShowUniqueController) {
ngShowUniqueController.register(element, function() {
return scope.$eval(attrs.ngShowUnique);
});
scope.$on('$destroy', function() {
ngShowUniqueController.unregister(element);
});
}
};
});
This can be seen at http://plnkr.co/edit/1eJUou4UaH6bnAN0nJn7?p=preview . I have to admit, it's all a bit faffy.

using ngRepeat that shows only one element at time, in my opinion, is a bad idea... because you're showing only one element!
you can use the parent.activeChild property directly...
Have a look on what follows:
Note: I did this snippet in just ten minutes, it's unoptimized and can have some bug... you can use it as starter :)
(function(window, angular, APP) {
APP
.value('menuObject', {
name: 'Main Navigation',
current: null,
children: [{
label: 'Don\'t ng-show element until ng-hide CSS transition is complete?',
url: 'http://stackoverflow.com/questions/33336249/dont-ng-show-element-until-ng-hide-css-transition-is-complete',
isCurrent: false
},
{
label: 'Hitmands - Linkedin',
url: 'http://it.linkedin.com/in/giuseppemandato',
isCurrent: false
},
{
label: 'Hitmands - Github',
url: 'https://github.com/hitmands',
isCurrent: false
},
{
label: 'Hitmands - StackOverflow',
url: 'http://stackoverflow.com/users/4099454/hitmands',
isCurrent: false
}
]})
.directive('menu', function(menuObject, $q) {
function menuCtrl($scope, $element) {
$scope.parent = menuObject;
this.getCurrentChild = function() {
return $scope.parent.current;
};
this.getDomContext = function() {
return $element;
};
this.setCurrentChild = function(child) {
return $q.when($scope.parent)
.then(function(parent) {
parent.current = child;
return parent;
})
.then(function(parent) {
return parent.children.forEach(function(item) {
item.isCurrent = child && (item.label === child.label);
});
})
};
}
return {
restrict: 'A',
templateUrl: 'embedded-menutemplate',
scope: {},
controller: menuCtrl
};
})
.directive('menuItem', function($animate, $q, $timeout) {
function menuItemPostLink(iScope, iElement, iAttributes, menuCtrl) {
iElement.bind('click', setCurrentTitle);
iScope.$on('$destroy', function() {
iElement.unbind('click', setCurrentTitle);
})
function setCurrentTitle(event) {
event.preventDefault();
var title;
return $q
.when(menuCtrl.getDomContext())
.then(function(_menuElement) {
title = angular.element(
_menuElement[0].querySelector('#menuItemCurrent')
);
})
.then(function() {
return title.addClass('fade-out');
})
.then(function() {
return $timeout(menuCtrl.setCurrentChild, 700, true, iScope.child);
})
.then(function() {
return title.removeClass('fade-out');
})
}
}
return {
require: '^menu',
link: menuItemPostLink,
restrict: 'A'
};
})
;
})(window, window.angular, window.angular.module('AngularAnimationExample', ['ngAnimate']));
nav {
text-align: center;
}
.link {
display: inline-block;
background-color: lightseagreen;
color: black;
padding: 5px 15px;
margin: 1em;
}
#menuItemCurrent {
padding: 1em;
text-transform: uppercase;
border: 1px solid black;
}
#menuItemCurrent span {
transition: 500ms opacity linear;
opacity: 1;
}
#menuItemCurrent.fade-out span {
opacity: 0;
}
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.7/angular-animate.js"></script>
<article ng-app="AngularAnimationExample">
<nav menu></nav>
<script id="embedded-menutemplate" type="text/ng-template">
<nav >
<a menu-item class="link" ng-repeat="child in parent.children track by $index" ng-bind="child.label" ng-href="{{ child.url }}"></a>
<h1 id="menuItemCurrent"><span ng-bind="parent.current.url || 'NoMenuCurrentSelected'"></span></h1>
{{ parent.current || json }}
</nav>
</script>
</article>

The problem is that H1 is a block level element that is positioned within it's parent and no overlap is allowed. That is why you see one animation that's disappearing pushing down the animation that is appearing.
You can see that this is happening more clearly here: Demo
To fix this, you want to keep the block level element H1, and make its position relative, so that it can keep its relative position in the overall flow of the page. Then set the child SPAN elements to have absolute positioning - absolute position relative to the parent H1. This allows all span elements to overlap each other.
CSS
.fade {
opacity: 1;
position: relative;
}
.fade.ng-hide-add {
transition:opacity 1s ease;
position: absolute;
}
.fade.ng-hide-remove {
transition:opacity 1s ease 1s;
position: absolute;
}
.fade.ng-hide-add {
opacity:1;
}
.fade.ng-hide-add.ng-hide-add-active {
opacity:0;
}
.fade.ng-hide-remove {
opacity:0;
}
.fade.ng-hide-remove.ng-hide-remove-active {
opacity:1;
}
HTML
<body ng-controller="MainCtrl">
<h1><span class="fade" ng-repeat="child in parent.children" ng-show="parent.activeChild == child ">#{{child.title}}</span></h1>
<button ng-repeat="child in parent.children" ng-click="parent.activeChild = child">{{ child.title }}</button>
</body>
There is one problem though... Since the SPAN elements have absolute positioning, it is removed from flow when animating, and the parent H1 can't resize to fit the SPAN contents. This causes the SPAN to jump unexpectedly.
The way to address this (and admittedly, it's a bit of a hack) is by adding an empty space after the SPAN repeater. So when the ngRepeat SPANS get pulled out of normal flow because of absolute positioning, the empty space which is outside the ngRepeat preserves the spacing of the H1.
Here is a working Plunker.

You might want to look into transitionend event which is supported by all modern browsers.
element.addEventListener('transitionend', callback, false);

Quick answer to this - To solve this problem in the past I have always positioned the content absolute. This way when the transition takes place it stays in the same position.
There is no other way around it because the content takes up space in the dom if its inline or inline-block which is why you see the jump until the transition is finished

CSS or JS transition for button that changes size from text changes?

I have an Angular app with a button that has a label of "+"
On mouse-over I call element.append(' Add a New Number'); This adds that text new to the + in the label.
Use clicks the button, new number is added, label of button is returned to "+"
I would like to animate the button size change and/or the txt label change. So far, just adding a css transition to width does nothing.
Thoughts?
UPDATE:
To help clarify, this is a bootstrap input group button. I don't want to set widths or css transforms, to avoid breaking the group either here or at other screen sizes.
here are the 2 states:
I was simply letting the existing button stretch due to the injection of more words.

I am probably guessing you don't have a predefined width. anyways you could use transform-origin and scale to achieve such an effect
FIDDLE HERE
HTML:
<button id="btn">Click</button>
CSS:
#btn {
outline: none;
border:none;
background: orange;
padding: 1em 1.5em;
-webkit-transition: .3s;
-o-transition: .3s;
transition: .3s;
}
#btn:hover {
-webkit-transform: scaleX(1.2);
-ms-transform: scaleX(1.2);
-o-transform: scaleX(1.2);
transform: scaleX(1.2);
-webkit-transform-origin:0 0;
-moz-transform-origin:0 0;
-ms-transform-origin:0 0;
-o-transform-origin:0 0;
transform-origin:0 0;
}
you should use CSS transforms for animations rather than a property like width. The animation is slightly jerky , so you might want to work on it a bit more.

You had jQuery tagged, so this is how I would do it.
All the transitions. fade + animate
function changeButtonText(button, text){
// jQuery it
$button = $(button);
// get orinal css'es
oooon = $button.css('text-align');
doooo = $button.css('overflow');
treee = $button.css('white-space');
$button.css('text-align', 'left').css('overflow', 'hidden').css('white-space', 'nowrap');;
// get new width first
$tmpBtn = $button.clone().append(text).css('opacity', '0.0').appendTo('body');
newWidth = $tmpBtn.outerWidth();
$tmpBtn.remove();
// now stretch the button out
$button.animate({width: newWidth+"px"});
// fade texts into the butt
$button.append('<span style="display:none">'+text+'</span>');
$btnText = $button.find('span').fadeIn('slow');
return {
'text-align':oooon,
'overflow':doooo,
'white-space':treee
};
}
Fiddle

I think that with bootstrap CSS and Angular - it will be more complex, but this is how I would go about it programatically. You'll have to deal with the model and the data differently - and you should probably build a directive to repeat the action and integrate with Angular smoothly:
HTML
<div class="thing">+ <span id="message">
<span id='target'></span>
</span></div>
JavaScript
$('.thing').hover( function() {
var originalWidth = $(this).outerWidth();
$messageHolder = $(this).find('#message');
$target = $(this).find('#target');
$target.text('Some helpful text');
var targetWidth = $target.outerWidth();
$messageHolder.animate({
width: targetWidth
}, {
duration: 200,
complete: function() {
$messageHolder.animate({
opacity: 1
}, 500);
}
});
});
$('.thing').on('click', function() {
$target = $(this).find('#target');
$target.empty();
$messageHolder = $(this).find('#message');
$messageHolder.animate({
opacity: 0
}, {
duration: 200,
complete: function() {
$messageHolder.animate({
width: 0
}, 200);
}
});
});
I'm sure that Angular's ng-animate library watches the dom and also has an excellent way of animating things as they change in the model/controller or whatever they are calling it. This is probably something what it looks like behind the scenes.
Good luck!
jsFiddle

Convert jQuery Hover to Angular

I am trying to convert a piece of code from jQuery to Angular, and since I am super new to this I am not sure if I am doing this right.
Here is the jquery code:
$('ul.nav li.dropdown').hover(function(){
$(this).find('.dropdown-menu').stop(true, true).delay(300).fadeIn();
}, function(){
$(this).find('.dropdown-menu').stop(true, true).delay(300).fadeOut();
});
What it is doing is when I mouseover a nav item, a div fades in.
This is what I have tried, but nothing happens:
angular.module("headToggle", ["ngAnimate"]).animation(".management-settings", function(){
return{
enter: function(element, done){
element.css("display", "none");
element.fadeIn(200, done);
return function(){
element.stop();
};
},
leave: function(element, done){
element.fadeOut(200, done);
return function(){
element.stop();
};
}
};
});
What am I doing wrong? Is what I am doing overkill?

You don't need Angular for this, you can do it with pure CSS:
.management-settings {
opacity: 0;
transition: opacity 200ms;
}
.management-settings:hover {
opacity: 1;
}
The full documentation on transitions can be found here: Using CSS transitions

I think you need to chain a .animation onto the element.css(), e.g:
element.css({'opacity', '0'}).animate({'opacity', '1'}, 200, done);
This could also be accomplished with ng-mouseover to change a boolean variable bound to ng-class e.g:
<div class=".dropdown-menu" ng-mouseover="hovered = true" ng-class={'is-hovered': hovered}></div>
Then in your css:
`.dropdown-menu{
transition: opacity 200ms linear;
opacity: 0;
}
.dropdown-menu.is-hovered{
opacity: 1;
}`
Previous answer is correct, you can use angular's built-in directives and pure css, and not have to write any of your own JS
Arg, I don't have the rep to reply to your comment on the previous post, but you can use the css property transition-delay

Menu animation slide from top function

I would like to add a menu like the one in this demo site Here
it drops down from the top of the page as you can see and i would like to know if this was done with only CSS3 or .
If someone can show me a simple function so i can go off it that would be nice!
EDIT: ok i found the code snippet for it I think , i still want to know if this is a good way to do it , and if someone can make this more simple, seems like a lot of code just for that
var isUp = false;
var navHeight = $('#navContainer').height();
var hideHeight = navHeight - 50;
$('#arrowLink a').click(function(e){
e.preventDefault();
navHeight = $('#navContainer').height();
hideHeight = navHeight - 50;
$('.tooltip').remove();
if(!isUp){
$(this).find('img').attr('src',template_directory+'/images/menu_hide_arrow_bottom.png');
$(this).find('img').attr('title',showNav);
$( "#navContainer" ).animate({
top: '-='+ hideHeight + 'px'
}, 500, "swing", function() {
isUp = true;
});
}else{
$(this).find('img').attr('src',template_directory+'/images/menu_hide_arrow_top.png');
$(this).find('img').attr('title',hideNav);
$( "#navContainer" ).animate({
top: "0"
}, 500, "swing", function() {
isUp = false;
});
if($('body').hasClass('body_show_content'))
{
$('#mainContainer').fadeIn();
}
}
});`

Yes, it can be done. You can use css transition/keyframes and a click event.
Code
html
<div id="container hidden">Something</div>
css
#container {
postion:fixed;
-webkit-transition: all 2s;
transition: all 2s;
}
.hidden {
top: -25px;
}
js
$('#container').click(function(){
$(this).toggleClass('hidden');
});
Explanation
Your menu is fixed at the top of the page. Whenever you toggle the button that displays/hides it, you can add a css class that changes the position of the element. Because you have transition on the element, it will animate to that new location. This can also be done using keyframes instead of transition to have more control.
css transition
css keyframes

If you want to achieve this using pure css, you need to make use of transition effect. Check out the fiddle which gives a fair idea of something similar.
FIDDLE

jQuery slideUp to show the element and not hide

jQuery's slideUp effect hides the element by sliding it up, while slideDown shows the element. I want to show my div using slideUp. can anyone guide me ? thanks

$("div").click(function () {
$(this).hide("slide", { direction: "down" }, 1000);
});
http://docs.jquery.com/UI/Effects/Slide

It's a little more complex than just saying slideUpShow() or something, but you can still do it. This is a pretty simple example, so you might find some edge-cases that need adressing.
$("#show-animate-up").on("click", function () {
var div = $("div:not(:visible)");
var height = div.css({
display: "block"
}).height();
div.css({
overflow: "hidden",
marginTop: height,
height: 0
}).animate({
marginTop: 0,
height: height
}, 500, function () {
$(this).css({
display: "",
overflow: "",
height: "",
marginTop: ""
});
});
});
Here's a fiddle showing the slideUp/slideDown methods, the same effects using animate, and a modified version using animate that goes in reverse: http://jsfiddle.net/sd7zsyhe/1/
Since animate is a built-in jQuery function, you don't need to include jQuery UI.

To get the opposite of slideUp and slideDown. Add these two functions to jQuery.
$.fn.riseUp = function() { $(this).show("slide", { direction: "down" }, 1000); }
$.fn.riseDown = function() { $(this).hide("slide", { direction: "down" }, 1000); }

I found a tricky way...
you can set div with css style bottom:0px,
add call
$("#div).slideDown();
will show with the slideUp-to-show effect you want.

Jquery toggle
This toggle effect is only for up and down. Jquery UI is for every other direction

For those who don´t use the Jquery UI but want to add the function to Jquery Library:
jQuery.fn.slideUpShow = function (time,callback) {
if (!time)
time = 200;
var o = $(this[0]) // It's your element
if (o.is(':hidden'))
{
var height = o.css({
display: "block"
}).height();
o.css({
overflow: "hidden",
marginTop: height,
height: 0
}).animate({
marginTop: 0,
height: height
}, time, function () {
$(this).css({
display: "",
overflow: "",
height: "",
marginTop: ""
});
if (callback)
callback();
});
}
return this; // This is needed so others can keep chaining off of this
};
jQuery.fn.slideDownHide = function (time,callback) {
if (!time)
time = 200;
var o = $(this[0]) // It's your element
if (o.is(':visible')) {
var height = o.height();
o.css({
overflow: "hidden",
marginTop: 0,
height: height
}).animate({
marginTop: height,
height: 0
}, time, function () {
$(this).css({
display: "none",
overflow: "",
height: "",
marginTop: ""
});
if (callback)
callback();
});
}
return this;
}
Credits: #redbmk answer

Despite the name, slideDown can actually slide your element both ways. Use absolute position if it is required to animate inside the parent element:
#slideup {
position:fixed;
bottom:0;
background:#0243c9;
color:#fafefa;
width:100%;
display:none;
padding: 20px;
}
#littleslideup {
position:absolute;
bottom:0;
background:#000;
color:#fff;
display:none;
padding:10px;
z-index:100;
}
#slidedown {
position:fixed;
top:0;
background:#c94333;
color:#fafefa;
width:100%;
display:none;
padding: 20px;
}
button {
display:inline-block;
font-size:16px;
padding:10px;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div style="position:relative">This amounts to 70% of the total timber stand area of the region (not including the dwarf pine and shrubby alder) and is more than the total area of all other stone birch forests growing in the Magadan, Khabarovsk, Primorye and Sakhalin regions and other areas of its distribution.
<div id="littleslideup">Absolute-positioned element</div>
</div>
<span style="color:red">Click >> </span>
<button onclick="jQuery('#slideup').slideDown(1500);" >"Slideup"</button>
<button onclick="jQuery('#slidedown').slideDown(1500);" >"Slidedown"</button>
<button onclick="jQuery('#littleslideup').slideDown(1500);">"Slideup" inside element</button>
<div>Finally, closing the subject of volcanic activity, it must be said that the stone birch stands by its functional reaction quite adequately in order to re ect the character and intensity of the physical, chemical and thermic processes, stipulated by volcanism as well as the in uence upon biota and ecosystems.</div>
<div id="slideup">Could be a bottom cookie warning bar</div>
<div id="slidedown">Could be a top cookie warning bar</div>

I've got some downvotes so I checked my answer and indeed I didn't answered correctly the OP question, sorry. So I'm gonna try to fix that.
First, the slideUp() method in JQuery is intended to hide the element rather than reveal it. It is basically the opposite of slideDown() which shows your element by sliding it down.
By knowing that I think we agree that there is no magic function right there to do a slide up effect to show an element (in JQuery).
So we need to do a little bit of work to get what we need: slid up reveal effect. I found out some solutions and here is one I think simple to implement:
https://coderwall.com/p/9dsvia/jquery-slideup-to-reveal
The solution above works with the hover event, for the click event try this modified code:
http://jsfiddle.net/D7uT9/250/
The answer given by #redbmk is also a working solution.
Sorry for my misunderstanding the first time.
OLD ANSWER
It's an old post, but if someone is looking for a solution here is my recommandation.
We can, now, use slideToggle() to achieve this effect (without the need of jQuery UI).
$(".btn").click(function () {
$("div").slideToggle();
});
Documentation: http://api.jquery.com/slidetoggle/

Having encountered this with a student looking to "slide up always hide" an error container, I advised he simply use CSS transitions:
.slide-up {
transition: 1s ease-out;
transform: scale(1);
}
.slide-up[aria-hidden="true"] {
transform: scale(0);
height: 0;
}
jQuery(document).ready(function($) {
const $submitButton = $(".btn");
const $someDivs = $("div");
const $animatedSlidingTargets = $(".slide-up");
$someDivs.on("click", function() {
$animatedSlidingTargets.attr("aria-hidden", true);
});
});

For #Jason's answer, whether slide-up to show and slide-down to hide, you still need to use the { direction: "down" } option in jQuery:
$(".btnAbout").on("click", function () {
// Slide-up to show
$("#divFooter").show("slide", { direction: "down" }, 1000);
});
$("#btnCloseFooter").on("click", function () {
// Slide-down to hide
$("#divFooter").hide("slide", { direction: "down" }, 1000);
});
But this requires jquery-ui, or else you'll hit the TypeError: something.easing[this.easing] is not a function error:
<script defer src="https://code.jquery.com/ui/1.13.2/jquery-ui.min.js"></script>