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35 lines
842 B
35 lines
842 B
var Tween = require('./Tween'); |
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var defaults = require('./defaults'); |
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var noop = require('./noop'); |
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var isNum = require('./isNum'); |
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var $offset = require('./$offset'); |
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exports = function(target, options) { |
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options = options || {}; |
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defaults(options, defOpts); |
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if (!isNum(target)) target = $offset(target).top; |
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new Tween({ |
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y: window.pageYOffset |
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}) |
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.on('update', function(target) { |
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window.scroll(0, target.y); |
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}) |
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.on('end', function() { |
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options.callback(); |
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}) |
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.to( |
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{ |
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y: target - options.tolerance |
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}, |
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options.duration, |
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options.easing |
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) |
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.play(); |
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}; |
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var defOpts = { |
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tolerance: 0, |
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duration: 800, |
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easing: 'outQuart', |
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callback: noop |
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}; |
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module.exports = exports;
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