scrollnav/dist/scrollnav.min.mjs

A small, dependency free JavaScript plugin for auto generating single page navigation

function f(f,h){var y,w={};for(y in f)Object.prototype.hasOwnProperty.call(f,y)&&(w[y]=f[y]);for(y in h)Object.prototype.hasOwnProperty.call(h,y)&&(w[y]=h[y]);return w}function h(f,h){if("object"!=typeof f)return Promise.reject(new Error("First argument must be an object"));if("object"!=typeof(h=h||document.body))return Promise.reject(new Error("Second argument must be an object"));var y=h.getBoundingClientRect();return f.getBoundingClientRect().top-y.top}function y(f,w,E){void 0===E&&(E="scroll-nav");var L=[];return E+="__",f.forEach(function(f,O){var x=[],j=function(f,h){if("object"!=typeof f)return Promise.reject(new Error("First argument must be an object"));var y=f.id;if(!y){if("string"!=typeof h)return Promise.reject(new Error("Second argument must be a string"));f.id=y=h}return y}(f,E+(O+1));w.subSections&&f.matches(w.sections)&&(x=y(function(f,h,y){var w=[];for(f=f.nextElementSibling;f&&!f.matches(h);)!y||f.matches(y)?(w.push(f),f=f.nextElementSibling):f=f.nextElementSibling;return w}(f,w.sections,w.subSections),w,j));L.push({id:j,text:f.innerText||f.textContent,offsetTop:h(f),subSections:x})}),L}function w(f){var h=document.createElement("nav");return h.className="scroll-nav",h.innerHTML=function f(h,y){void 0===y&&(y=!1);var w="scroll-nav"+(y?"__sub-":"__"),E="\n    "+h.map(function(h){return'<li class="'+w+'item" data-sn-section="'+h.id+'">\n            <a class="'+w+'link" href="#'+h.id+'">'+h.text+"</a>\n            "+(h.subSections&&h.subSections.length?""+f(h.subSections,!0):"")+"\n          </li>"}).join("")+"\n  ";return'\n    <ol class="'+w+'list">\n      '+E+"\n    </ol>\n  "}(f),h}function E(f){return f.forEach(function(f){var y=document.querySelector("#"+f.id);f.offsetTop=h(y),f.subSections.length&&(f.subSections=E(f.subSections))}),f}function L(f,h){var y=f.getAttribute("href");return"#"===y.charAt(0)&&(y=y.substr(1)),function f(h,y){var w;h.forEach(function(h){h.id===y&&(w=h),h.subSections&&void 0===w&&(w=f(h.subSections,y))});return w}(h,y).offsetTop}var O,x,j,_=function(f){return function(h){return Math.pow(h,f)}},I=function(f){return function(h){return 1-Math.abs(Math.pow(h-1,f))}},Q=function(f){return function(h){return h<.5?_(f)(2*h)/2:I(f)(2*h-1)/2+.5}},C={linear:Q(1),easeInQuad:_(2),easeOutQuad:I(2),easeInOutQuad:Q(2),easeInCubic:_(3),easeOutCubic:I(3),easeInOutCubic:Q(3),easeInQuart:_(4),easeOutQuart:I(4),easeInOutQuart:Q(4),easeInQuint:_(5),easeOutQuint:I(5),easeInOutQuint:Q(5)};function M(f,h){return new Promise(function(y,w){if("number"!=typeof f)return w(new Error("First argument must be a number"));if("string"!=typeof(h=h||"linear"))return w(new Error("Second argument must be a string"));var E,L=window.pageYOffset,O=f-L,x=function(f){var h=Math.abs(f/2);return Math.min(Math.max(h,250),1200)}(O),j=20,_=0;!function f(){E=C[h]((_+=j)/x),window.scroll(0,E*O+L),_<x?setTimeout(f,j):y(window.pageYOffset)}()})}function q(f){function h(){var h=window.scrollY||window.pageYOffset||document.body.scrollTop,y=h+.4*window.innerHeight,w=function f(h,y,w){var E,L;h.forEach(function(f){f.offsetTop>w?!E&&f.offsetTop<y&&(E=f):E=f}),E&&E.subSections.length&&(L=f(E.subSections,y,w))&&(E=L);return E}(f.data,h,y);return function(f,h){var y=h.querySelector("[data-sn-active]");if(f){var w=h.querySelector("[data-sn-section="+f.id+"]");w&&w!==y&&(y&&(y.classList.remove("scroll-nav__item--active"),y.removeAttribute("data-sn-active")),w.classList.add("scroll-nav__item--active"),w.setAttribute("data-sn-active",!0))}else y&&(y.classList.remove("scroll-nav__item--active"),y.removeAttribute("data-sn-active"))}(w,f.nav),w}return window.addEventListener("scroll",h),h}function B(f){return f instanceof Element}export default{init:function(h,_){if(this.settings=f({sections:"h2",insertTarget:h,insertLocation:"before",easingStyle:"easeOutQuad",updateHistory:!0},_),B(h))if(!this.settings.insertTarget||B(this.settings.insertTarget))if(["append","prepend","after","before"].includes(this.settings.insertLocation)){var I,Q,C,F,R=h.querySelectorAll(this.settings.sections);if(R.length)return this.data=y(R,this.settings),this.nav=w(this.data),Q=(I=this).settings.insertTarget,"append"===(C=I.settings.insertLocation)?Q.appendChild(I.nav):"prepend"===C?Q.insertBefore(I.nav,Q.firstChild):"before"===C?Q.parentNode.insertBefore(I.nav,Q):"after"===C&&Q.parentNode.insertBefore(I.nav,Q.nextSibling),O=function(f){var h=f.settings;function y(y){y.preventDefault();var w=.39*window.innerHeight;return M(L(y.target,f.data)-w,h.easingStyle).then(function(){h.updateHistory&&history.replaceState({},"",y.target.getAttribute("href")),h.onScroll&&h.onScroll()})}return f.nav.querySelectorAll("a").forEach(function(f){f.addEventListener("click",y)}),y}(this),x=q(this),j=function(f){function h(){f.data=E(f.data)}return window.addEventListener("resize",h),h}(this),this.settings.debug&&((F=document.createElement("div")).className="snDebugger",F.setAttribute("style","\n      position: fixed;\n      top: 40%;\n      height: 0px;\n      border-bottom:5px solid red;\n      border-top: 5px solid blue;\n      width: 100%;\n      opacity: .5;\n      pointer-events: none;\n    "),document.body.appendChild(F)),this.settings.onInit?this.settings.onInit():void 0;this.settings.debug&&console.error('\n        scrollnav build failed, could not find any "'+this.settings.sections+'"\n        elements inside of "'+h+'"\n      ')}else this.settings.debug&&console.error('\n        scrollnav build failed, options.insertLocation "'+this.settings.insertLocation+'" is not a valid option\n      ');else this.settings.debug&&console.error('\n        scrollnav build failed, options.insertTarget "'+h+'" is not an HTML Element\n      ');else this.settings.debug&&console.error('\n        scrollnav build failed, content argument "'+h+'" is not an HTML Element\n      ')},destroy:function(h){if(this.settings=f(this.settings,h),function(f,h){f.querySelectorAll("a").forEach(function(f){f.removeEventListener("click",h)})}(this.nav,O),function(f){window.removeEventListener("scroll",f)}(x),function(f){window.removeEventListener("resize",f)}(j),this.nav.remove(),this.settings.onDestroy)return this.settings.onDestroy()},updatePositions:function(h){if(this.settings=f(this.settings,h),this.data=E(this.data),this.settings.onUpdatePositions)return this.settings.onUpdatePositions()}};
//# sourceMappingURL=scrollnav.min.mjs.map