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7 lines
1.3 KiB
JavaScript
7 lines
1.3 KiB
JavaScript
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/**
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* Most Visible v1.5.0
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*
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* @author Andy Palmer <andy@andypalmer.me>
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* @license MIT
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*/
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!function(e,t){"function"==typeof define&&define.amd?define([],function(){return t(e)}):"object"==typeof module&&module.exports?module.exports=t(e):e.mostVisible=t(e)}("undefined"!=typeof self?self:this,function(e){"use strict";function i(e,t){if(!(this instanceof i))return new i(e,t).getMostVisible();"string"==typeof e&&(e=document.querySelectorAll(e)),this.elements=e,this.options=function(e){for(var t=1;t<arguments.length;t++)for(var i in arguments[t])e[i]=arguments[t][i];return e}({},i.defaults,t)}return i.defaults={percentage:!1,offset:0},i.prototype={getMostVisible:function(){var n=this,o=document.documentElement.clientHeight;return Array.prototype.reduce.call(this.elements,function(e,t){var i=n.getVisibleHeight(t,o);return i>e[0]?[i,t]:e},[0,null])[1]},getVisibleHeight:function(e,t){var i=e.getBoundingClientRect(),n=i.top-this.options.offset,o=i.bottom-this.options.offset,s=i.bottom-i.top,r=0<=n&&n<t,f=0<o&&o<t,u=0;if(r&&f)u=s;else if(r)u=t-i.top;else if(f)u=o;else if(t<s&&n<0){var l=Math.abs(n);l<s&&(u=s-l)}return this.options.percentage?u/s*100:u}},i.makeJQueryPlugin=function(e){e&&(e.fn.mostVisible=function(e){var t=new i(this.get(),e);return this.filter(t.getMostVisible())})},i.makeJQueryPlugin(e.jQuery),i});
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