A pure-javascript library and set of directives to scroll smoothly to an element with easing. Easing support contributed by Willem Liu with code from Gaëtan Renaudeau.

No jQuery required.

• Exposes a service that scrolls the window to an element's location
• Provides two directives that enable smooth scrolling to elements.
• Clean: No classes are added, no jQuery is required, no CSS files or configuration is needed.

Include the .js file in your page then enable usage of the directive by including the "smoothScroll" module as a dependency

Install with bower with:

bower install ngSmoothScroll

This module provides two directives:

####smoothScroll:

Attribute. Scrolls the window to this element, optionally validating the expression inside scroll-if.

Example:

// Basic - The window will scroll to this element's position when compiling this directive
<div smooth-scroll></div>


// With options
<div smooth-scroll duration="800" easing="easeInQuint" offset="120" callback-before="aFunction(element)" callback-after="anotherFunction">{{...}}</div>


// With condition
<div smooth-scroll scroll-if="{{ myExpression }}">{{...}}</div>


// Inside ng-repeat
<div smooth-scroll scroll-if="{{ $last }}" duration="2500">{{...}}</div>

####scrollTo:

Attribute. Scrolls the window to the specified element ID when clicking this element.

Example:

// Basic
<a href="#" scroll-to="my-element-3">Click me!</a>


// With options
<button scroll-to="elem-id5" duration="1800" callback-before="aFunction(element)" callback-after="anotherFunction">Scroll to next page.</button>

Inject the 'smoothScroll' service in your directive / factory / controller / whatever, and call like this:

// Using defaults
var element = document.getElementById('my-elem');
smoothScroll(element);


// With options
var element = $elem[0];

var options = {
	duration: 700,
	easing: 'easeInQuad',
	offset: 120,
	callbackBefore: function(element) {
		console.log('about to scroll to element', element);
	},
	callbackAfter: function(element) {
		console.log('scrolled to element', element);
	}
}

smoothScroll(element, options);


// In directive's link function
link: function($scope, $elem, $attrs){
	var options = $attrs;

	smoothScroll($elem[0], options);
}

Type: Integer Default: 0

The duration of the smooth scroll, in miliseconds.

Type: Integer Default: 0

The offset from the top of the page in which the scroll should stop.

type: string default: easeinoutquart

the easing function to be used for this scroll.

type: function default: function(element) {}

a callback function to run before the scroll has started. It is passed the element that will be scrolled to.

type: function default: function(element) {}

a callback function to run after the scroll has completed. It is passed the element that was scrolled to.

The available easing functions are:

• 'easeInQuad'
• 'easeOutQuad'
• 'easeInOutQuad'
• 'easeInCubic'
• 'easeOutCubic'
• 'easeInOutCubic'
• 'easeInQuart'
• 'easeOutQuart'
• 'easeInOutQuart'
• 'easeInQuint'
• 'easeOutQuint'
• 'easeInOutQuint'

Callback hooks contributed by Ben Armston. https://github.com/benarmston

Easing support contributed by Willem Liu. https://github.com/willemliu

Easing functions forked from Gaëtan Renaudeau. https://gist.github.com/gre/1650294

Infinite loop bugs in iOS and Chrome (when zoomed) by Alex Guzman. https://github.com/alexguzman

Influenced by Chris Ferdinandi https://github.com/cferdinandi

Free to use under the MIT License.

Cheers.