53 lines
1.2 KiB
JavaScript
53 lines
1.2 KiB
JavaScript
( function ( M, $ ) {
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var View = M.require( 'mobile.startup/View' );
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/**
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* Displays a little arrow at the bottom right of the viewport.
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* @class BackToTopOverlay
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* @extends View
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*/
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function BackToTopOverlay() {
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View.apply( this, arguments );
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}
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OO.mfExtend( BackToTopOverlay, View, {
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className: 'backtotop',
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template: mw.template.get( 'skins.minerva.backtotop', 'BackToTopOverlay.hogan' ),
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events: $.extend( {}, View.prototype.events, {
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click: 'onBackToTopClick'
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} ),
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/**
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* Show the back to top element, if it's not visible already.
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* @memberof BackToTopOverlay
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* @instance
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*/
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show: function () {
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this.$el.css( 'visibility', 'visible' ).addClass( 'visible' );
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},
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/**
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* Hide the back to top element, if it's visible.
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* @memberof BackToTopOverlay
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* @instance
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*/
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hide: function () {
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this.$el.removeClass( 'visible' );
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},
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/**
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* Handles the click on the "Back to top" element and scrolls back
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* to the top smoothly.
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* @memberof BackToTopOverlay
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* @instance
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*/
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onBackToTopClick: function () {
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$( 'html, body' ).animate( { scrollTop: 0 }, 400 );
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}
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} );
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M.define( 'skins.minerva.backtotop/BackToTopOverlay', BackToTopOverlay );
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}( mw.mobileFrontend, jQuery ) );
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