33 lines
732 B
JavaScript
33 lines
732 B
JavaScript
(function() {
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var BackToTop = function() {
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var self = this;
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this.subscribe("widget/ready", function(evt, button) {
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$.extend(self, {
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button: button,
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body: $("html, body"),
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window: $(window)
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});
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self.button.click(self.backToTop);
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var debouncedScroll = _.debounce(self.toggleVisibility, 250);
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$(window).scroll(debouncedScroll)
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});
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this.backToTop = function(evt) {
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evt.preventDefault();
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self.body.animate({scrollTop: 0});
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};
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this.toggleVisibility = function() {
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self.button.animate({
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opacity: (self.body.scrollTop() > 1000)
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? 0.5
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: 0
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});
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};
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};
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Diaspora.Widgets.BackToTop = BackToTop;
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})();
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