|
- /*! gumshoejs v3.5.1 | (c) 2018 Chris Ferdinandi | MIT License | http://github.com/cferdinandi/gumshoe */
- !(function(e,t){"function"==typeof define&&define.amd?define([],t(e)):"object"==typeof exports?module.exports=t(e):e.gumshoe=t(e)})("undefined"!=typeof global?global:this.window||this.global,(function(e){"use strict";var t,n,o,r,a,c,i,l={},s=[],u={selector:"[data-gumshoe] a",selectorHeader:"[data-gumshoe-header]",container:e,offset:0,activeClass:"active",scrollDelay:!1,callback:function(){}},f=function(){return"querySelector"in document&&"addEventListener"in e&&"classList"in document.createElement("_")},d=function(e,t,n){if("[object Object]"===Object.prototype.toString.call(e))for(var o in e)Object.prototype.hasOwnProperty.call(e,o)&&t.call(n,e[o],o,e);else for(var r=0,a=e.length;r<a;r++)t.call(n,e[r],r,e)},v=function(){var e={},t=!1,n=0,o=arguments.length;"[object Boolean]"===Object.prototype.toString.call(arguments[0])&&(t=arguments[0],n++);for(;n<o;n++){var r=arguments[n];!(function(n){for(var o in n)Object.prototype.hasOwnProperty.call(n,o)&&(t&&"[object Object]"===Object.prototype.toString.call(n[o])?e[o]=v(!0,e[o],n[o]):e[o]=n[o])})(r)}return e},m=function(e){return Math.max(e.scrollHeight,e.offsetHeight,e.clientHeight)},g=function(){return Math.max(document.body.scrollHeight,document.documentElement.scrollHeight,document.body.offsetHeight,document.documentElement.offsetHeight,document.body.clientHeight,document.documentElement.clientHeight)},h=function(e){var n=0;if(e.offsetParent)do{n+=e.offsetTop,e=e.offsetParent}while(e);else n=e.offsetTop;return n=n-a-t.offset,n>=0?n:0},p=function(t){var n=t.getBoundingClientRect();return n.top>=0&&n.left>=0&&n.bottom<=(e.innerHeight||document.documentElement.clientHeight)&&n.right<=(e.innerWidth||document.documentElement.clientWidth)},y=function(){s.sort((function(e,t){return e.distance>t.distance?-1:e.distance<t.distance?1:0}))};l.setDistances=function(){o=g(),a=r?m(r)+h(r):0,d(s,(function(e){e.distance=h(e.target)})),y()};var b=function(){var e=document.querySelectorAll(t.selector);d(e,(function(e){if(e.hash){var t=document.querySelector(e.hash);t&&s.push({nav:e,target:t,parent:"li"===e.parentNode.tagName.toLowerCase()?e.parentNode:null,distance:0})}}))},H=function(){c&&(c.nav.classList.remove(t.activeClass),c.parent&&c.parent.classList.remove(t.activeClass))},C=function(e){H(),e.nav.classList.add(t.activeClass),e.parent&&e.parent.classList.add(t.activeClass),t.callback(e),c={nav:e.nav,parent:e.parent}};l.getCurrentNav=function(){var n=e.pageYOffset;if(e.innerHeight+n>=o&&p(s[0].target))return C(s[0]),s[0];for(var r=0,a=s.length;r<a;r++){var c=s[r];if(c.distance<=n)return C(c),c}H(),t.callback()};var L=function(){d(s,(function(e){e.nav.classList.contains(t.activeClass)&&(c={nav:e.nav,parent:e.parent})}))};l.destroy=function(){t&&(t.container.removeEventListener("resize",j,!1),t.container.removeEventListener("scroll",j,!1),s=[],t=null,n=null,o=null,r=null,a=null,c=null,i=null)};var E=function(e){window.clearTimeout(n),n=setTimeout((function(){l.setDistances(),l.getCurrentNav()}),66)},j=function(e){n||(n=setTimeout((function(){n=null,"scroll"===e.type&&l.getCurrentNav(),"resize"===e.type&&(l.setDistances(),l.getCurrentNav())}),66))};return l.init=function(e){f()&&(l.destroy(),t=v(u,e||{}),r=document.querySelector(t.selectorHeader),b(),0!==s.length&&(L(),l.setDistances(),l.getCurrentNav(),t.container.addEventListener("resize",j,!1),t.scrollDelay?t.container.addEventListener("scroll",E,!1):t.container.addEventListener("scroll",j,!1)))},l}));
|
