smooth-scroll.min.js

/*! smooth-scroll v16.1.2 | (c) 2020 Chris Ferdinandi | MIT License | http://github.com/cferdinandi/smooth-scroll */
!(function(e,t){"function"==typeof define&&define.amd?define([],(function(){return t(e)})):"object"==typeof exports?module.exports=t(e):e.SmoothScroll=t(e)})("undefined"!=typeof global?global:"undefined"!=typeof window?window:this,(function(w){"use strict";var L={ignore:"[data-scroll-ignore]",header:null,topOnEmptyHash:!0,speed:2000,speedAsDuration:!1,durationMax:null,durationMin:null,clip:!0,offset:50,easing:"easeInOutCubic",customEasing:null,updateURL:!0,popstate:!0,emitEvents:!0},H=function(){var n={};return Array.prototype.forEach.call(arguments,(function(e){for(var t in e){if(!e.hasOwnProperty(t))return;n[t]=e[t]}})),n},r=function(e){"#"===e.charAt(0)&&(e=e.substr(1));for(var t,n=String(e),o=n.length,a=-1,r="",i=n.charCodeAt(0);++a<o;){if(0===(t=n.charCodeAt(a)))throw new InvalidCharacterError("Invalid character: the input contains U+0000.");1<=t&&t<=31||127==t||0===a&&48<=t&&t<=57||1===a&&48<=t&&t<=57&&45===i?r+="\\"+t.toString(16)+" ":r+=128<=t||45===t||95===t||48<=t&&t<=57||65<=t&&t<=90||97<=t&&t<=122?n.charAt(a):"\\"+n.charAt(a)}return"#"+r},q=function(){return Math.max(document.body.scrollHeight,document.documentElement.scrollHeight,document.body.offsetHeight,document.documentElement.offsetHeight,document.body.clientHeight,document.documentElement.clientHeight)},x=function(e){return e?(t=e,parseInt(w.getComputedStyle(t).height,10)+e.offsetTop):0;var t},Q=function(e,t,n,o){if(t.emitEvents&&"function"==typeof w.CustomEvent){var a=new CustomEvent(e,{bubbles:!0,detail:{anchor:n,toggle:o}});document.dispatchEvent(a)}};return function(o,e){var I,a,M,A,C={};C.cancelScroll=function(e){cancelAnimationFrame(A),A=null,e||Q("scrollCancel",I)},C.animateScroll=function(i,s,e){C.cancelScroll();var c=H(I||L,e||{}),u="[object Number]"===Object.prototype.toString.call(i),t=u||!i.tagName?null:i;if(u||t){var l=w.pageYOffset;c.header&&!M&&(M=document.querySelector(c.header));var n,o,a,d,r,f,m,h,p=x(M),g=u?i:(function(e,t,n,o){var a=0;if(e.offsetParent)for(;a+=e.offsetTop,e=e.offsetParent;);return a=Math.max(a-t-n,0),o&&(a=Math.min(a,q()-w.innerHeight)),a})(t,p,parseInt("function"==typeof c.offset?c.offset(i,s):c.offset,10),c.clip),y=g-l,v=q(),S=0,E=(n=y,a=(o=c).speedAsDuration?o.speed:Math.abs(n/1e3*o.speed),o.durationMax&&a>o.durationMax?o.durationMax:o.durationMin&&a<o.durationMin?o.durationMin:parseInt(a,10)),b=function(e,t){var n,o,a,r=w.pageYOffset;if(e==t||r==t||(l<t&&w.innerHeight+r)>=v)return C.cancelScroll(!0),o=t,a=u,0===(n=i)&&document.body.focus(),a||(n.focus(),document.activeElement!==n&&(n.setAttribute("tabindex","-1"),n.focus(),n.style.outline="none"),w.scrollTo(0,o)),Q("scrollStop",c,i,s),!(A=d=null)},O=function(e){var t,n,o;d||(d=e),S+=e-d,f=l+y*(n=r=1<(r=0===E?0:S/E)?1:r,"easeInQuad"===(t=c).easing&&(o=n*n),"easeOutQuad"===t.easing&&(o=n*(2-n)),"easeInOutQuad"===t.easing&&(o=n<.5?2*n*n:(4-2*n)*n-1),"easeInCubic"===t.easing&&(o=n*n*n),"easeOutCubic"===t.easing&&(o=--n*n*n+1),"easeInOutCubic"===t.easing&&(o=n<.5?4*n*n*n:(n-1)*(2*n-2)*(2*n-2)+1),"easeInQuart"===t.easing&&(o=n*n*n*n),"easeOutQuart"===t.easing&&(o=1- --n*n*n*n),"easeInOutQuart"===t.easing&&(o=n<.5?8*n*n*n*n:1-8*--n*n*n*n),"easeInQuint"===t.easing&&(o=n*n*n*n*n),"easeOutQuint"===t.easing&&(o=1+--n*n*n*n*n),"easeInOutQuint"===t.easing&&(o=n<.5?16*n*n*n*n*n:1+16*--n*n*n*n*n),t.customEasing&&(o=t.customEasing(n)),o||n),w.scrollTo(0,Math.floor(f)),b(f,g)||(A=w.requestAnimationFrame(O),d=e)};0===w.pageYOffset&&w.scrollTo(0,0),m=i,h=c,u||history.pushState&&h.updateURL&&history.pushState({smoothScroll:JSON.stringify(h),anchor:m.id},document.title,m===document.documentElement?"#top":"#"+m.id),"matchMedia"in w&&w.matchMedia("(prefers-reduced-motion)").matches?w.scrollTo(0,Math.floor(g)):(Q("scrollStart",c,i,s),C.cancelScroll(!0),w.requestAnimationFrame(O))}};var t=function(e){if(!e.defaultPrevented&&!(0!==e.button||e.metaKey||e.ctrlKey||e.shiftKey)&&"closest"in e.target&&(a=e.target.closest(o))&&"a"===a.tagName.toLowerCase()&&!e.target.closest(I.ignore)&&a.hostname===w.location.hostname&&a.pathname===w.location.pathname&&/#/.test(a.href)){var t,n;try{t=r(decodeURIComponent(a.hash))}catch(e){t=r(a.hash)}if("#"===t){if(!I.topOnEmptyHash)return;n=document.documentElement}else n=document.querySelector(t);(n=n||"#top"!==t?n:document.documentElement)&&(e.preventDefault(),(function(e){if(history.replaceState&&e.updateURL&&!history.state){var t=w.location.hash;t=t||"",history.replaceState({smoothScroll:JSON.stringify(e),anchor:t||w.pageYOffset},document.title,t||w.location.href)}})(I),C.animateScroll(n,a))}},n=function(e){if(null!==history.state&&history.state.smoothScroll&&history.state.smoothScroll===JSON.stringify(I)){var t=history.state.anchor;"string"==typeof t&&t&&!(t=document.querySelector(r(history.state.anchor)))||C.animateScroll(t,null,{updateURL:!1})}};C.destroy=function(){I&&(document.removeEventListener("click",t,!1),w.removeEventListener("popstate",n,!1),C.cancelScroll(),A=M=a=I=null)};return (function(){if(!("querySelector"in document&&"addEventListener"in w&&"requestAnimationFrame"in w&&"closest"in w.Element.prototype))throw"Smooth Scroll: This browser does not support the required JavaScript methods and browser APIs.";C.destroy(),I=H(L,e||{}),M=I.header?document.querySelector(I.header):null,document.addEventListener("click",t,!1),I.updateURL&&I.popstate&&w.addEventListener("popstate",n,!1)})(),C}}));