AngularJS companion module for ScrollMagic
npm install ng-magics
{{ progress }}
`
`javascript
// may use built-in debounce or throttle services for best performance
$scope.progressHandler = throttle((e) => {
$scope.progress = Math.round(e.progress * 100) + '%';
$scope.$apply();
}, 100);
`
Instead of jQuery-fashioned, harder to maintain code:
`javascript
var scene = new ScrollMagic.Scene({
triggerElement: '#element',
// manually calculated number
// or a function that calculates it from responsive elements
duration: 100
})
.setClassToggle('#anotherElement', 'activeClass')
.on('enter leave', (e) => {
$('#anotherElement').text(e.type == 'enter' ? 'active' : '');
})
.on('progress', (e) => {
$('#element').text(Math.round(e.progress * 100) + '%');
});
new ScrollMagic.Controller()
.addscene(scene);
`
Even if the full power of ScrollMagic is demanded for some serious black arts, ScrollMagic API is available through Angular services.
Glossary
$3
The stage behind the sequence of scenes which does no actions and holds no logic. Known as controller in ScrollMagic but renamed to stage in ng-magics to match its role better and avoid confusion with Angular controllers (it even asked for that in person).
It defines root element for the act (any container, but, more frequently, window) and the axis of scrolling. All the relevant scenes are attached to it, the controller also defines default settings for them.
The stage holds global information (current position, direction, container) about the stage. There's not much to say about it besides that.
$3
The place where the magic happens in ScrollMagic. The scene triggers events on its beginning, continuation and finale, any sort of change (likely visual) can be caused by them.
ScrollMagic doesn't perform any visual effects by itself, they have to be implemented by either CSS3 classes or third-party animation library (TweenMax or TweenLite).
A scene may be some abstract start point and have no end, but ng-magics magics-scene directive limits the scene to the bounds of specific DOM element.
$3
Fixes the element in viewport during the current scene, until it is unpinned manually, or the scene is over. While ScrollMagic can pin an arbitrary element, ng-magics magics-pin directive is supposed to pin only scene's children.
$3
The concept of scene spies is specific to ng-magics. A spy directive, magics-spy binds scope properties to the events ('enter', 'leave' and 'progress') of the relevant scene.
Prerequisites
The module depends on ScrollMagic (ScrollMagic global) and its GSAP and addIndicators (for enabled magicsProvider.debug) plugins that should be loaded before the application is bootstrapped.
It also depends on GreenSock TweenMax or TweenLite libraries (TweenMax or TweenLite global) and their ScrollToPlugin plugin for ScrollMagic animations, one of the libraries should be loaded before ScrollMagic.
API
##magicsScene
Creates a new scene or reuses the existing one
on either the stage specified by
magicsStage directive or 'default' stage.###Directive Info
###Usage
* as attribute:
`
[magics-scene-options="Object"]>
...
####Arguments
| Param | Type | Details |
| :--: | :--: | :--: |
| magicsScene
(optional) | string |
Scene name.
|
| magicsSceneOptions
(optional) | Object | Options that are used on scene creation.
|##magicsSpy
Sets up a spy for the scene specified
by either parent
directive or magicsSpyScene attribute.###Directive Info
###Usage
* as attribute:
`
[magics-spy-scene="string"]
[magics-spy-progress="expression"]>
...
####Arguments
| Param | Type | Details |
| :--: | :--: | :--: |
| magicsSpy
(optional) | expression |
Scope variable flag (read-only).
|
| magicsSpyScene
(optional) | string | Scene name.
|
| magicsSpyProgress
(optional) | expression | Scene progress callback function.
|##magicsStage
Creates a new stage or reuses the existing one.
###Directive Info
###Usage
* as attribute:
[magics-stage-options="Object"]>
...
####Arguments
| Param | Type | Details |
| :--: | :--: | :--: |
| magicsStage
(optional) | string |
Stage name.
|Options that have to be passed to magics.stage.