AngularJS. Анимация в AngularJS. Библиотека ngAnimation


Содержание материала:

Анимация новых элементов в AngularJS

Я использую AngularJS, и я пытаюсь анимировать при вводе новых элементов в моем массиве:

Но есть проблема с тем, как я обновляю свой массив: я делаю это с http.get , и я не нажимаю какой-то новый элемент на свой объект, но полностью обновляю его, как здесь:

Итак, есть ли способ обработать анимацию в этом случае или мне нужно изменить способ обновления массива?

javascript angularjs ng-animate

2 ответа

Если вы используете ngAnimate, вы можете анимировать класс ng-enter без проблем. Проверьте этот плункер.

Я устанавливаю задержку в 2 секунды, а затем полностью заменяю массив. Анимация по-прежнему работает должным образом. Используя Angular версию 1.2+, просто включите модуль ngAnimate в основной модуль приложения

Дайте вашим элементам ng-repeat класс css, например ‘animate’. И присоедините анимацию css, когда классы ng-enter, ng-leave добавляются angular

Это старый вопрос, но я наткнулся на него и подумал, что поставлю свои $0.02

Вместо того, чтобы заменять объект новым списком, просто чтобы получить несколько новых элементов, вместо этого просто введите новые элементы в обратную сторону массива, а затем отобразите массив в ваш ng-repeat в обратном порядке. Таким образом, когда появляются новые предметы, они идут по одному, что позволяет им анимировать.

Best AngularJs Animation Directives Plugins

Angular Ui-loader : Loader and Progress bar for Angular 5 & 6+

An all-in-one and fully customizable loader/spinner for Angular 5+ and Angular 6+ applications. It supports foreground, background spinner/loader and indicative progress bar.

Easy Animations For Angular : ngx-animations

ngx-animations is the quickest way to get started with Angular animations – without writing your own animations!

Specifically, this package specializes in animations that can be used when adding or removing items from a list.

NgxSpinner : A library for loading spinner for Angular

NgxSpinner an animated loading spinner for Angular 5+ that is intended to inform the user that an operation is in progress.

Angular 2+ Masonry Gr > February 1, 2020 | Animation, Gallery, Plugins

Angular 2+ masonry grid component with CSS animations on scroll.

Ngx-WOW : Angular module for WOW.js

Angular module for WOW.js: a customizable library to reveal animations when you scroll.

Flippy : AngularJS CSS3 Flip Animation Directive

AngularJS directive implementation with a CSS3 flip animation.

Ng-Animate : collection of Cool & flexible Animations for Angular

ng-animate is a collection of cool, reusable and flexible animations for Angular. It implements all the animations in animate.css, but with the power and flexibility of Angular animations instead of CSS.

ngx-trend : Simple, elegant Spark lines for Angular

Angular trend is a simple, elegant trend graphs for Angular.

Features:

  • Simple. Integrate in seconds.
  • Scalable. Uses SVG for sharp, scalable graphs. Will fill the parent container, or you can prov >Read MoreDemo

Angular2 Loading Spinner Component

A fairly simple and customizable spinner for your angular 2/4 component.

Create Animated Particles In AngularJS

Angular 1.x module used to render animated, customizable particles in the application.

JavaScript Animations in AngularJS Applications

AngularJS is a feature-rich framework for creating single-page web applications, bringing all capabilities that one needs for building rich and interactive apps. One of the key features that Angular brings is the support of animations.

We can animate a portion of the application to indicate a change occurring. In my last article I covered the support of CSS animations in Angular applications. In this article, we will see how to leverage JavaScript to animate the AngularJS apps.

In Angular, the only difference between CSS and JavaScript animations is their definition. There is no difference in the way the defined animations are used. To start with, we need to load the ngAnimate module to the root module of our application.

The animation events to be handled in the JavaScript animation also remain the same. Following is a list of directives supporting animations and their events for different actions:

Directives Events
ng-view
ng-include
ng-switch
ng-if
enter
leave
ng-repeat enter
leave
move
ng-show
ng-hide
ng-class
add
remove

The above listing is the same as the one in the previous article, but doesn’t mention the corresponding CSS classes, as we don’t need them to define JavaScript animations. These events are generated only if the application module loads the ngAnimate module. Now let us see how to animate some of the directives.

Syntax for a Custom Angular Animation

A basic skeleton of a custom JavaScript animation is as follows:

Here are some things to keep in mind when writing a JavaScript animation in AngularJS:

  1. The name of the animation starts with a dot(.)
  2. Every animation action accepts two parameters:
    • An object that is the current DOM element on which the animation will be applied. It is either a jQlite object if jQuery is not loaded before loading AngularJS. Otherwise, it is a jQuery object.
    • A callback function that is called once the animation is complete. Action of the directive is halted till the done function is called.

We have a number of JavaScript libraries like jQuery, Greensock, Anima and several others that ease the work of writing animations. To keep things simple, I’m using jQuery for creating animations in this article. To learn about the other libraries, you can visit their respective sites.

Animating ng-view

The animation applied on an ng-view directive takes place when a user switches between views of an AngularJS application. As listed in the table above, we can animate when a view enters or leaves. It is not necessary to handle both of these cases; we can animate the one that seems necessary.

Following is an animation that induces some visual effect when a view is entering:

The above creates a slide-in effect when a view enters the page. The done method is passed as the callback. This is to indicate that the animation is complete and now the framework can continue with the next action.

Notice the way the animate() method is called. We didn’t have to convert the element to a jQuery object as the jQuery library is loaded before loading AngularJS.

Now we need to apply this animation to the ng-view directive. Though the animation is defined in JavaScript, by convention we apply it using a class on the target directive.

Animating ng-repeat

ng-repeat is one of the most important directives, with a number of options available. Two of the basic operations of the directive are filtering and sorting. Items under the directive are added, removed, or moved, depending on the kind of action performed.

Let’s apply some basic animations so that one can see when a change is happening.

Animating ng-hide

The ng-hide directive adds or removes the ng-hide CSS class on the target element. To apply an animation, we need to handle the cases of adding and removing the CSS class. The name of the class is passed to the animation handler class. This lets us inspect the class and take appropriate action.

Below is an example of animation code that fades out or fades in the element on activation or deactivation of the ng-hide directive:

Animating a Custom Directive

To animate a custom directive, we need to use the $animate service. Though $animate is part of the AngularJS core framework, ngAnimate should be loaded to make best use of the service.

Using the same demo as the last article, we’re presenting a page with a list of courses. We create a directive to show details of a course in a box, and the contents of the box would change after clicking the “View Statistics” link. Let’s add an animation to make the transition visible to the user.

We’ll add a CSS class when the transition happens and we’ll remove the class once the animation is complete. Below is the code for this directive:

As you can see, we are performing the action after the animation is completed. On inspecting the directive element in the browser developer tools, we will see the classes switching-active and switching-add being added and removed very quickly. We can define either a CSS transition or a custom JavaScript animation to see the animation happening. Following is a sample CSS transition that can be used with the above directive, vendor prefixes omitted for brevity:

Alternatively, here is a jQuery animation to use for the same directive:

One of these animations can be applied on the custom directive just as we applied the animations on the built-in directives.

You can see all of the above animations in action on the demo page.

Conclusion

Animations, when used appropriately and functionally, bring life to applications. As we’ve seen, AngularJS has rich support for both CSS and JavaScript animations. You can choose one of these based on your team’s circumstances.

But use of a lot of animations may lead to a slower application and the application may seem over-engineered to an end user. So, this weapon has to be used carefully and optimally.

Animations in AngularJS with ngAnimate

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Adding Animations to any web applications is like sprinkling toppings on a cake. Animations enhances user interface by making it smooth and more attractive, which ultimately enhances user experience.

Animations can be done using javascript or css3, Angular js makes adding animations easy.

To implement animations in AngularJs we need to add the angular-animate.js library and inject the ngAnimate dependency into our application and of-course we need angular.js

Angular animate provides animation hooks to common directives like ng-repeat,ng-hide,ng-switch,ng-view etc.
Animations can be added as css rules to these hooks or can even be done in javascript using $animate service.

Common directives and supported animations.


Angular js adds some classes when major events take place wrt these directives.
EG: ng-enter when the element is about to display.

Note: These hooks and classes are not availaible without angular-animate.

In this example we will be adding animation to an ng-if directive.

Step 1:Add an anchor class

Add a class to your element.The class name can be anything, we will use this class as an anchor, to add our animations. Below I’ve added food-table class to our food table (Note it can be any element, I’ve just picked it from my other tutorials)

Step 2:Add your directive to your element.

Now we will add our ng-if directive with a condition to include or delete our element (In this case element is our food table.)

Adding a button to reverse the value of showTable every-time on click using ng-click.This will add or delete our element.
Remember we are adding animations to our ng-if directive.

Final thing we will do in step 2 is initialize $scope.showTable to true in our controller , so that our element displays on load.

Step 4:Adding animation rules in css

.food-table .ng-enter <
-webkit-animation : 1.5s anim_enter ;
-moz-animation : 1.5s anim_enter ;
-o-animation : 1.5s anim_enter ;
animation : 1.5s anim_enter ;
position : relative ;
>
@keyframes anim_enter <
from <
left : 100% ;
>
to <
left : 0 ;
>
>

@-webkit-keyframes anim_enter <
from <
left : 100% ;
>
to <
left : 0 ;
>
>

.food-table .ng-leave <
-webkit-animation : 1.5s anim_leave ;
-moz-animation : 1.5s anim_leave ;
-o-animation : 1.5s anim_leave ;
animation : 1.5s anim_leave ;
position : relative ;
>

@keyframes anim_leave <
from <
left : 0 ;
>
to <
left : 100% ;
>
>

@-webkit-keyframes anim_leave <
from <
left : 0 ;
>
to <
left : 100% ;
>
>

.food-table.ng-leave:
These rules are triggered when the element is about to be removed from the dom.ng-leave class is automatically added by AngularJs when the element is about to be removed from the DOM( In case of ng-if )

anim_leave: Name of the animation.

@keyframes anim_leave: Key frame rules for anim_leave.

We are changing the position left from 0 to 100 and over a duration of 1.5 sec hence the element will appear to be exiting the page from the right.

Similarly ng-enter class is added by AngularJs when the element is added to the DOM ( in case of ng-if )

Angular Js also provides add and remove hooks to classes added and removed using ng-class.Using this we can add animation in between to elements when a css class is added or removed.

Step 1 : Add you >

Step 2 : Add animations to css hooks wrt that >

.selected-add , .selected-remove <
transition : 300ms linear all ;
>

.selected , .selected-add .selected-add-active <
font-size : 3em ;
background-color : #00AEEF ;
color : white ;
>

.selected-remove .selected-remove-active <
background-color : #707070 ;
font-size : 1em ;
>

Here the class specified in ng-class is .selected.Now angular js will add hooks such as .selected-remove , .selected-add etc. We have added animation to these hook classes to show animation in between.

In my example I’ve added ng-class expression to rows in ng-repeat and the selected class is applied when the row gets selected using arrows.However the animations can be added to other elements and classes not necessarily in ng-repeat.

AngularJs also provides animation via the $animate service, so animations can also be done using javacript. Using this strategy, can leverage re-usability but keep in mind browser runs javascript on higher priority than css, this will stop any other execution until the animation is completed when done using javascript.
Check out the AngularJs Documentation for an example.

With the increasing power of modern browsers ,the performance issues with animations is fading away.Not to mention the fact that animations make your application cool and interesting.

AngularJs provides a clean and easy way to animate directives using the ngAnimate module,so goahead and try it in your next project.

Animations: the Angular Way

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ngAnimate and the $animate Service

The Angular core team gave us the ngAnimate module so that we could give our apps a way to animate from a data driven ‘Angular way’, and so that we could hook into the events that Angular emits through some of its built-in directives.

Angular, unlike jQuery, focuses on binding our view to a JavaScript object through the use of controllers. This approach allows us to bind view values like input fields directly to a corresponding value in a JavaScript object and trigger view changes through data changes, or vice versa.

So then, just how do we hook animations into these events if they could happen from either the view or the corresponding object being changed?

First, we need to add ngAnimate to our project.

Including Angular Animation in our Project

As of 1.2.0, animations are no longer part of the Angular core, but are instead in their own separate module: ngAnimate . In order to use the $animate service, we need to include the animation library after Angular in our HTML file, like this: js/lib/angular-animate.js

As an alternative, you can also use the CDN or bower to install angular-animate :

However you choose to install it, make sure to include it in your source file, like so:

Next, we will have to include the ngAnimate module as a dependency to our app. This can be done when we instantiate our Angular app, like so:

Now that ngAnimate is included in our project (and as long as we do not have an injector error or something like that in our console) we can begin to create animations with Angular!

CSS3 Transitions

The easiest way to include animations in any application is by using CSS3 transitions. This is because they are completely class-based, which means that the animation is defined in a class and, as long as we use that class in our HTML, the animation will work in the browser.

CSS transitions are animations that allow an HTML element to steadily change from one style to another. To define a transition, we need to specify the element we want to add an effect to, and the duration of said effect.

First, let’s take a look at a simple example of a CSS3 transition, and then we can see how to make use of this knowledge from a data-driven Angular app.

Let’s create a simple div inside a container div and apply two classes to it: one for basic styling and one for our transition.

Now we can add transitions for either the hover state or static state of the element:

This applies two states to our div : one normal state and one for when we hover over the div . The transitions defined in the .rotate and .rotate:hover classes tell the browser how to transition between these two states when we trigger the hover and mouseleave events.

We end up with an effect like this:

Basic CSS3 Transition

Angular Data-Driven CSS3 Animation

Now let’s see how we could do something like that in an Angular app, and bind this same functionality to some data within our application.

Instead of doing this transition on :hover , we can create a simple animation by binding transitions to one class, .rotate , and create a class for both the «box» and «circle» states of the div . This enables us to switch between classes using the ng-class directive built into Angular.

To do this, we will need to set up our Angular app and create a conditional statement in the ng-class directive to switch the class based on the value of a boolean on the $scope .

Now let’s set up our JavaScript:

Here, we bind the boolean value that is attached to $scope.boxClass to whether or not the element should have the .box or .circle class. If the boolean is true, then the element will have the .box class. If it is false, it will have the .circle class. This allows us to trigger a CSS3 transition by changing the value of our data, with no DOM manipulation whatsoever.

This does not use the $animate service, but I wanted to provide an example of an instance that you could use CSS3 alone and not have to rely on $animate and ngAnimate .

The result of this is an animation that is triggered strictly by a data change when we change the underlying boolean by clicking the checkbox.

Angular Data-Driven CSS3 Transition

Transitions with $animate

If we want to leverage CSS3 transitions and the $animate service, then we need to know a couple things about how $animate works behind the scenes.

The $animate service supports several directives that are built into Angular. This is available without any other configuration, and allows us to create animations for our directives in plain CSS. To use animations in this way, you do not even need to include $animate in your controller; just include ngAnimate as a dependency of your Angular module.

Once you include ngAnimate in your module, there is a change in how Angular handles certain built-in directives. Angular will begin to hook into and monitor these directives, and add special classes to the element on the firing of certain events. For example, when you add, move, or remove an item from an array which is being used by the ngRepeat directive, Angular will now catch that event, and add a series of classes to that element in the ngRepeat .

Here you can see the classes that ngAnimate adds on the enter event of an ngRepeat :

ngRepeat Event Classes

The attached CSS classes take the form of ng- and ng--active for structural events like enter, move, or leave. But, for class-based animations, it takes the form of -add , -add-active , -remove , and -remove-active . The exceptions to these rules are ng-hide and ng-show . Both of these directives have add and remove events that are triggered, just like ng-class , but they both share the .ng-hide class, which is either added or removed when appropriate. You will also see ngAnimate add a .ng-animate class to some of these directives on animation.

Below is a table that illustrates some of the built-in directives, the events that fire, and classes that are temporarily added when you add ngAnimate to your project:

Built-In Directives’ $animate Events

Directive Event(s) Classes
ngRepeat enter ng-enter, ng-enter-active
leave ng-leave, ng-leave-active
move ng-move, ng-move-active
ngView, ngInclude, ngSwitch, ngIf enter ng-enter, ng-enter-active
leave ng-leave, ng-leave-active
ngClass add ng-add, ng-add-active
remove ng-remove, ng-remove-active
ngShow, ngHide add, remove ng-hide

Angular will automatically detect that CSS is attached to an animation when the animation is triggered, and add the .ng--active class until the animation has run its course. It will then remove that class, and any other added classes, from the DOM.

Below is an example of using CSS3 transitions to animate a ngRepeat directive. In it, we attach a transition to the base class— .fade in this case—and then piggyback off of the classes that ngAnimate will add to the li elements when they are added and removed from the array. Once again, this allows us to have data-driven animations — the Angular way.

ngRepeat $animate Powered CSS3 Transitions

As we can see, Angular’s ngAnimate gives us the ability to easily tap into events and leverage the power of CSS3 transitions to do some really cool, natural animations on our directives. This is by far the easiest way we can do animations for our Angular apps, but now we will look at some more complex options.

CSS3 Animations


CSS3 animations are more complicated than transitions, but have much of the same implementation on the ngAnimate side. However, in the CSS we will be using an @keyframes rule to define our animation. This is done in much the same way that we did our basic transition earlier, except we use the animation keyword in our CSS and give the animation a name like this:

Here we have created an appear and disappear animation that can be triggered through CSS in the place that our transition was before.

The difference this time, as you can see above, is that we no longer have to use .ng-enter-active or .ng-leave-active , but rather we can attach the animation to .ng-leave and .ng-active and the animation will trigger at the appropriate times because of ngAnimate . This is not a particularly better way to do it than our transition method above, but it illustrates how to use CSS3 animations, which can be MUCH more powerful than this simple effect.

The final result of this animation when applied to our previous grocery list ngRepeat example will look something like this:

ngRepeat $animate Powered CSS3 Animations

JavaScript Animations

Now for the elephant in the room: JavaScript animations with AngularJS.

Angular is entirely data-driven with its fancy two-way data binding—that is, until it isn’t. This is one of the most confusing things about coming from jQuery to Angular. We are told to re-learn how we think and throw out DOM manipulation in favor of bindings, but then, at some point, they throw it right back at us later. Well, welcome to that full-circle point.

JavaScript animation has one major advantage—JavaScript is everywhere, and it has a wider acceptance than some advanced CSS3 animations. Now, if you are just targeting modern browsers, then this probably won’t be an issue for you, but if you need to support browsers that do not support CSS transitions, then you can easily register a JavaScript animation with Angular and use it over and over in your directives. Basically, JavaScript has more support in older browsers, and therefore, so do JavaScript animations.

When you include ngAnimate as a dependency of your Angular module, it adds the animation method to the module API. What this means is that you can now use it to register your JavaScript animations and tap into Angular hooks in built-in directives like ngRepeat . This method takes two arguments: className(string) and animationFunction(function) .

The className parameter is simply the class that you are targeting, and the animation function can be an anonymous function that will receive both the element and done parameters when it is called. The element parameter is just that, the element as a jqLite object, and the done parameter is a function that you need to call when your animation is finished running so that angular can continue on it’s way and knows to trigger that the event has been completed.

The main thing to grasp here however, is what needs to be returned from the animation function. Angular is going to be looking for an object to be returned with keys that match the names of the events that you want to trigger animations on for that particular directive. If you are unsure what the directive supports, then just refer to my table above.

So for our ngRepeat example, it would look something like this:

And if we tie this all together with the same old boring (sorry) ngRepeat grocery list example and use jQuery for the actual animations:

Now, let me break down what is going on.

We can get rid of any CSS we previously had on the .fade class, but we still need some kind of class to register the animation on. So, for continuity’s sake, I just used the good old .fade class.

Basically, what happens here is that Angular will register your animation functions and call them on that specific element when that event takes place on that directive. For example, it will call your enter animation function when a new item enters an ngRepeat .

These are all very basic jQuery animations and I will not go into them here, but it is worth noting that ngRepeat will automatically add the new item to the DOM when it is added to the array, and that said item will be immediately visible. So, if you are trying to achieve a fade in effect with JavaScript, then you need to set the display to none immediately before you fade it in. This is something you could avoid with CSS animations and transitions.

Let’s tie it all together and see what we get:

ngRepeat $animate Powered JavaScript Animations

Conclusion

The ngAnimate module is a bit of a misleading name.

Granted, I could not come up with a better name if I tried, but it does not actually DO any animations. Rather, it provides you with access into Angular’s event loop so that you can do your own DOM manipulation or CSS3 animations at the proper, data-driven point. This is powerful in its own right because we are doing it ‘the Angular way’ instead of trying to force our own logic and timing onto a very particular framework.

Another benefit of doing your animations with ngAnimate is that once you write your animations for that directive, they can be packed up nicely and moved on to other projects with relative ease. This, in my book, is always a good thing.

AngularJS Animation with Example | How to Add ng-Animate?

by DataFlair Team · March 9, 2020

After the AngularJS Scope, we are going to learn different ways to add and create the Animations in AngularJS with the example. Along with this, we will see how to enable or disable animation and a list of directives for animation.

AngularJS Animation

Whenever the transformation of HTML elements happens, it gives the feel of the illusion of motion, this phenomenon is known as animation. AngularJS comes with the feature of animated transitions too. With the help of CSS, AngularJS can provide animation.

The very first step for AngularJS animation is to include an animation library.

Then, refer ng-animate module in an application.

Ways to Add ng-Animate

Ng-Animate is a module, which is used to add a class or remove a class. It is required to show the animation in your application. If you do not include an ng-animate module in your angular JS application, the animation will not be visible.

There are two ways to add ng-animate in our application

  • Include it in the root element where you are using the ng-app directive.

Syntax:

Syntax:

Where demoApp is the name given corresponding to ng-app (ng-app= “demoApp”) directive in the root element.

Work Of ng-Animate: Actually ng-Animate do not transform the HTML element, but when you are using ng-animate in your angularJS application, It notices some events HTML elements like a show or hide. To make animations, elements have some pre-defined classes.

Example of AngularJS Animation

The below code will hide the div if the checkbox is checked otherwise it will show the div.

Output:

Want to hide the div

​ Div Can Get Hidden

When the checkbox gets checked Div gets hidden.

List of Directives For Animation in AngularJS

  1. ng-show – It adds or removes an ng-show value from the DOM element.
  2. ng-hide – It adds or removes an ng-hide value from the DOM element.
  3. ng-class – It adds or removes an ng-class value from the DOM element.
  4. ng-view – When it enters the DOM, it adds ng-enter class and when it leaves the DOM, it adds an ng-leave class.
  5. ng-include – When it enters the DOM, it adds ng-enter class and when it leaves the DOM, it adds the ng-leave class.
  6. ng-repeat – When it enters the DOM, it adds ng-enter class and when it leaves the DOM, it adds an ng-leave class. Also, It adds ng-move to DOM elements too.
  7. ng-switch – When it enters the DOM, it adds ng-enter class and when it leaves the DOM, it adds the ng-leave class.
  8. ng-if – When it enters the DOM, it adds ng-enter class and when it leaves the DOM, it adds the ng-leave class.

AngularJS Animation in Custom Directive

We can include AngularJS animation within custom directives too by using dependency. Inject $animate in the directive created by you directly and make a call to it whenever required.

AngularJS Animation on Bootstrap

Whenever angularJS application gets bootstrap, all the animation features of that application get disable by default. Ng- animate module waits till the time downloading of a template is done that starts downloading once the bootstrap process gets finished. Then, it waits for the $digest that is executing at that time and for one more. This ensures that the whole application is completed, once the animation starts executing.

But if you want to continue animation in an application, even if it bootstraps So we can do so by providing animation globally. It means in the run function of the main module.

How to Enable Or Disable Animation in AngularJS?

We can even enable an animation or disable animation for specific elements or globally too.

There are four ways to do so:

1. $animateProvider.customFilter()

It is called during the config phase and takes filter as the argument. It will filter animation based on the returned boolean value. If the value it returns is true, an animation will get perform otherwise animation will not get performed.

2. $animateProvider.classNameFilter()

It is called during the config phase. It takes regex as the argument. This argument is matched with the class that will animate. The advantage of this strategy compares to others is that it gives speed a boost

3. $animate.enabled()

$animate.enabled(false) consist of the single boolean argument, it disables the animation globally.

$animate.enabled(myelement, false) consist of two argument. The first argument is the DOM element and the second argument is a Boolean value. It disables or enables animation on that particular element

4. OverWriting Styles

Whenever an AngularJS animation is initiated, animate applied ng-animate class on the elements for the time for which animation is about to take place. On that class to skip animation we can apply css transition styling.

Since transition: 0s is applied it will skip all the existing transition and that will not get animated again.

Flicker

When nested elements are used with the structural animation like an ng-if inside class – based animation elements like ng-class, it may be possible that prior to the start of actual animation, a flash of content will occur. an animated element is displayed briefly whenever such a brief flicker occurs.


In the above code there is a chance of flickering as ng-if animation is used inside the element with n-class animation. But we can avoid it by applying styles. Styles are applied on class ng-[event]-prepare. It is added prior to the initialization of animation but once the actual animation starts executing, it gets removed.
This class is added only for animation that are structural like enter, leave and move.

Still if flickering occurs then add some CSS styles to avoid it after it

$animate.pin

Whenever an animation starts executing ng-animate examines the animated element. Whether the animated element is inside the hierarchy of DOM elements or not. If it is outside the Dom tree, that animation will not work. Since mostly application uses root elements such as body or HTML, therefore there is less chance of occurrence of such issues.

But if occurs, it can be resolved by using $animate.pin(element,parentHost) to associate different elements of an application. It is invoked by calling it before the animation starts. It consists of two parameters one is the element which will animate and the second parameter is the element which is supposed to be as a parent.

Summary

AngularJS Animation is a form of transformation that causes an illusion of motion. There are a number of animation available some of them are hidden, show etc. Animation makes an application easy to understand as we can actually display what is happening when you are using certain directive. So, this was all in AngularJS Animation. Still, if you have any doubt, ask freely through comments.

AngularJS. Анимация в AngularJS. Библиотека ngAnimation

  • Мы будем использовать модуль ngAnimate для обеспечения возможности анимации.
  • Мы будем использовать основные ng директивы для того чтобы автоматически запускать анимации.
  • Когда в приложении встречается анимация, она работает в промежутке времени в котором выполняется стандартная DOM-операция над элементом (например, вставка или удаление узлов в ngRepeat или вставка или удаление классов в ngClass ).

Переключим проект на состояние соответствующее данному уроку:

Зависимости

2.1.1″ означает установить версию jQuery 2.1.1. Мы можем использовать bower для установки широкого набора сторонних библиотек.

Устройство анимаций сделанных с помощью ngAnimate

Шаблон

Модуль и анимации

Анимация ngRepeat с помощью CSS анимации переходов

Как видно в CSS-коде класс phone — listing комбинируются хуками анимации, которые позволяют перехватить и обработать события вставки и удаления элементов из списка:

  • класс ng — enter применяется к элементу, когда новый телефон добавился в список и отобразился на странице;
  • класс ng — move применяется, когда элементы перемещаются по списку;
  • класс ng — leave применяется, когда элемент удаляется из списка.

Когда происходит анимация два множества CSS-классов цепляется к элементу:

  • класс «starting» представляет стиль в начале анимации;
  • класс «active» представляет стиль в конце анимации.

Имя starting-класса это имя случившегося события (например, enter , move или leave ) с префиксом ng — . Например, в результате события enter получится класс с именем ng — enter .

Имя active-класса такое же как имя starting-класса, только с суффиксом — active . Эти два правила наименований CSS-классов позволяют разрабатывать анимации от начала до конца.

В примере выше элементы расширяются по высоте от 0 до 120 пикселов, когда они добавляются в список и сжимают обратно до 0, когда удаляются из списка. В то же время применяется эффект fade-in (постепенное появление) и fade-out (постепенное исчезновение). Всё это управляется CSS transition объявлениями.

Все современные браузеры хорошо поддерживают CSS transitions и CSS animations, кроме IE9 и раних версий. Если вы хотите, чтобы анимация поддерживалась в старых браузерах, то используйте JavaScript-based анимации.

Анимация ngView с помощью CSS анимации на основе ключевых кадров

Ничего сложного тут нет. Просто fade in и fade out эффекты при смене страниц. Единственная необычная вещь тут в том, что мы использовали абсолютное позиционирование для позиционирования следующей страницы (определяется как ng — enter ) сверху предыдущей страницы (та которая с классом ng — leave ) при выполнении cross fade анимации. В то время, когда предыдущая страница готовится к удалению она постепенно исчезает, а новая страница постепенно появляется сверху неё.

После завршения leave-анимации элемент удаляется, а после завершения enter-анимации CSS-классы ng — enter и ng — enter — active удаляются из элемента вызывая перерисовку и перепозиционирование элемента с CSS-кодом для него по умолчанию (поэтому нет никакого абсолютного позиционирования после завершения анимации). Это всё работает плавно, поэтому нет никаких скачков при изменении маршрута в приложении.

CSS-классы (start и end классы) применяются также как и для ng — repeat . Каждый раз при загрузке новой страницы директива ng — view делает свою копию, загружает шаблон и добавляет контент. Это гарантирует то, что все представления содержатся в единственном HTML-элементе, который можно легко анимировать и управлять анимацией.

Анимация ngClass с помощью JavaScript

Давайте добавим другую анимацию в наше приложение. На странице phone — detail . html у нас есть переключатель изображений. При клике на миниатюру меняется изображение профиля телефона. Давайте добавим анимацию на это действие.

При клике на миниатюру меняется состояние изображения профиля для того чтобы установить новое изображение. Лучший способ показать смену состояний в HTML это использовать классы. Также как мы ранее использовали CSS классы чтобы указать анимацию, в этом случае мы будем запускать анимацию когда меняется CSS-класс.

Когда выбирается новая миниатюра, состояние меняется и CSS-класс . active добавляется к соответствующем изображению профиля и запускается проигрывание анимации.

Измененный способ отображения большого изображения:

Мы использовали repeater для отображения всех изображений в профиле в виде списка. Но мы не анимировали ничего связанное с этим списком. В директиве ng-class у нас находится условный класс, каждый раз когда его выражение истинно он применяется к элементу и визуализируется. В противном случае изображение профиля скрывается. В нашем случае есть только один элемент с классом active, поэтому будет отображаться только одно большое изображение профиля.

Когда класс active добавляется к элементу, добавляются классы active — add и active — add — active прямо перед сигналом AngularJS пальнуть анимацией. Когда удаляется классы active — remove и active — remove — active , прицепляются к элементу чем запускают другую анимацию.

Чтобы убедиться в том что изображения телефонов отображаются корректно, когда страница впервые загружена мы также поправили CSS-стили страницы деталей:

Тут мы использовали jQuery для реализации анимации. Необязательно использовать jQuery, просто мы не хотим сейчас писать JavaScript-библиотеку для выполнения анимаций, а в jQuery это уже есть. Для того чтобы подробнее узнать о функции jQuery . animate смотрите документацию.

Callback-функции addClass и removeClass вызываются всякий раз, когда класс добавляется или удаляется с элемента, который содержит зарегистрированный нами класс, в данном случае . phone . Когда класс . active добавляется к элементу (через директиву ng — class ) JavaScript callback addClass вызывается с передаваемым ему параметром element . Последний параметр done это callback-функция, которую надо вызвать чтобы оповестить Angular об окончании JavaScript-анимации.

Callback-функция removeClass , работает таким же образом, но приводится в действие, когда класс удаляется с элемента.

С помощью JavaScript callback мы создали анимацию посредством манипуляций с DOM. В коде выше это что делают element . css () и element . animate () . Callback позиционирует следующий элемент со смещением 500 pixels и анимирует оба, и старый и новый элементы смещая их вверх на 500 pixels . В результате это дает конвейер-ленточную анимацию. После того как функция animate выполняет свою задачу она вызывает done .

И addClass и removeClass возвращают функцию. Это опциональная функция, которая вызывается, когда анимация отменяется (например, когда должна быть выполнена другая анимация над тем же элементом) или когда анимация завершает свое выполнение. Логический параметр передаваемый в эту функцию позволяет разработчику знать была ли отменена анимация. Эта функция может быть использована для любых необходимых чисток после завершения анимации.

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angularJS ng-анимировать с animate.css

Как заставить ng-animate работать с animate.css на простых элементах html, таких как абзацы изображений или divs?

На статической странице я просто добавляю библиотеки animate.css и wow.js и добавляю пару классов к элементу, который я хочу оживить. Но мне не удалось заставить его работать внутри ng-view.

В Угловом 1. 2+ вам не нужно объявлять директиву ng-animate в вашем прикладном модуле. Анимации можно добавлять с помощью чистого CSS.

Во-первых, вам нужно включить угловую анимационную библиотеку в дополнение к угловому:

Вам нужно установить условия для ng-animate для вашего элемента. Для ваших элементов изображения:

Вам также необходимо включить CSS для действий, которые вы хотите, поэтому для вашего примера:

Анимация будет срабатывать при входе элемента. Если вы хотите загрузить его на загрузку страницы, это займет больше времени. Если вы хотите загрузить его при отображении элемента, вы должны использовать что-то вроде ng-repeat , чтобы при отображении элемента он будет исчезать.

Введение в AngularJS

Что такое AngularJS

AngularJS представляет собой opensource JavaScript-фреймворк, использующий шаблон MVC. Собственно использование MVC является его одной из отличительных особенностей.

Для описания интерфейса используется декларативное программирование, а бизнес-логика отделена от кода интерфейса, что позволяет улучшить тестируемость и расширяемость приложений.

Другой отличительной чертой фреймворка является двустороннее связывание, позволяющее динамически изменять данные в одном месте интерфейса при изменении данных модели в другом. Таким образом, AngularJS синхронизирует модель и представление.

Кроме того, AngularJS поддерживает такие функциональности, как Ajax, управление структорой DOM, анимация, шаблоны, маршрутизация и так далее. Мощь фреймворка, наличие богатого функционала во многом повлияла на то, что он находит свое применение во все большем количестве веб-приложений, являясь на данный момент наверное одним из самых популярных javascript-фреймворков.

Официальный сайт фреймворка: http://angularjs.org/. Там вы можете найти сами исходные файлы, обучающие материалы и другие сопроводительные материалы относительно библиотеки.

На момент написания данного руководства последней версией фреймворка была версия 1.6.4.

Начало работы c AngularJS

Посмотрим, что же представляет собой AngularJS. Для этого нам потребуется файлы самого фреймворка, поэтому загрузим саму библиотеку по ссылке, указанной выше:

Также можно использовать ссылку на библиотеку из сети CDN компании Google: https://ajax.googleapis.com/ajax/libs/angularjs/1.6.4/angular.min.js.

При загрузке zip-пакета мы найдем в нем кроме самой библиотеки (angular.js) еще ряд дополнительных файлов и их минимизированные версии:

angular-touch.js : предоставляет поддержку событий сенсорного экрана

angular-animate.js : предоставляет функциональность анимации

angular-aria.js : предоставляет поддержку aria-атрибутов (accesible rich internet application)

angular-mocks.js : предоставляет mock-объекты для юнит-тестирования

angular-route.js : обеспечивает механизм маршрутизации

angular-sanitize.js : предоставляет функционал для управления потенциально опасным контентом (javascript, html)

angular-cookies.js : обеспечивает функционал для управления куками

angular-loader.js : используется для загрузки angularjs-скриптов

angular-messages.js : предоставляет функционал для вывода сообщений

angular-resource.js : обеспечивает функциональность для работы с ресурсами

Папка i18n : содержит js-файлы для разных локалей

Из всех загруженных скриптов в архиве нас будет интересовать прежде всего файл angular.min.js

Теперь собственно создадим приложение. Оно будет стандартным HelloWorld. Код html-страницы будет следующим:

Первое, наверное, что бросается в глаза — это новые атрибуты, добавленные к стандартным тегам html (в данном случае ng-app и ng-model ). Эти атрибуты являются директивами фреймворка AngularJS. Благодаря их встраиванию фреймворк позволяет добавить элементам определенное поведение.

Конкретно в данном случае директива ng-app объявляет элемент корневым для всего приложения, а директива ng-model указывает модель «name», к которой будет привязано значение элемента input. И при изменении текста в элементе input, модель «name» также будет динамически изменять свое значение.

Чуть ниже в элементе

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