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no module.loaded needed\n\t\texports: {}\n\t};\n\n\t// Execute the module function\n\t__webpack_modules__[moduleId](module, module.exports, __webpack_require__);\n\n\t// Return the exports of the module\n\treturn module.exports;\n}\n\n","// define getter functions for harmony exports\n__webpack_require__.d = function(exports, definition) {\n\tfor(var key in definition) {\n\t\tif(__webpack_require__.o(definition, key) && !__webpack_require__.o(exports, key)) {\n\t\t\tObject.defineProperty(exports, key, { enumerable: true, get: definition[key] });\n\t\t}\n\t}\n};","__webpack_require__.o = function(obj, prop) { return Object.prototype.hasOwnProperty.call(obj, prop); }","// define __esModule on exports\n__webpack_require__.r = function(exports) {\n\tif(typeof Symbol !== 'undefined' && Symbol.toStringTag) {\n\t\tObject.defineProperty(exports, Symbol.toStringTag, { value: 'Module' });\n\t}\n\tObject.defineProperty(exports, '__esModule', { value: true });\n};","import throttle from 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this.opts.items ) ).map( ( link ) => {\n\t\t\tlet id = null;\n\t\t\tlet target = null;\n\n\t\t\tif ( link.hash ) {\n\t\t\t\tid = link.hash.slice( 1 );\n\t\t\t\ttarget = document.getElementById( id );\n\t\t\t}\n\n\t\t\treturn { id, link, target };\n\t\t} );\n\n\t\twindow.addEventListener( 'resize', this.setState.bind( this ) );\n\t\tthis.content.addEventListener( 'scroll', this.setState.bind( this ) );\n\n\t\tif ( 'snap' === this.opts.mode ) {\n\t\t\tthis.forward.addEventListener( 'click', this.forwardIndex.bind( this ) );\n\t\t\tthis.back.addEventListener( 'click', this.backIndex.bind( this ) );\n\t\t} else {\n\t\t\tthis.forward.addEventListener( 'pointerdown', this.scrollForward.bind( this ) );\n\t\t\tthis.forward.addEventListener( 'pointerup', this.scrollStop.bind( this ) );\n\t\t\tthis.back.addEventListener( 'pointerdown', this.scrollBack.bind( this ) );\n\t\t\tthis.back.addEventListener( 'pointerup', this.scrollStop.bind( this ) );\n\t\t}\n\n\t\tif ( this.opts.sticky ) {\n\t\t\tconst onScrollActiveAnchor = () => {\n\t\t\t\tconst { scrollTop, clientHeight } = document.documentElement;\n\t\t\t\tconst absTarget = scrollTop + ( clientHeight / 3 ); // prettier-ignore\n\t\t\t\tconst distances = this.items\n\t\t\t\t\t.filter( ( item ) => item.target )\n\t\t\t\t\t.reduce(\n\t\t\t\t\t\t( distances, item ) => ( {\n\t\t\t\t\t\t\t...distances,\n\t\t\t\t\t\t\t[ item.id ]: item.target ? Math.abs( item.target.getBoundingClientRect().top + scrollTop - absTarget ) : null,\n\t\t\t\t\t\t} ),\n\t\t\t\t\t\t{}\n\t\t\t\t\t);\n\n\t\t\t\tconst closest = Object.keys( distances ).reduce(\n\t\t\t\t\t( closest, id ) => ( ! closest || ! distances[ closest ] || distances[ id ] < distances[ closest ] ? id : closest ),\n\t\t\t\t\tnull\n\t\t\t\t);\n\n\t\t\t\tthis.items.forEach( ( item ) => {\n\t\t\t\t\tif ( closest && item.id === closest ) {\n\t\t\t\t\t\titem.link.classList.add( 'header-navigation__item--active' );\n\t\t\t\t\t} else {\n\t\t\t\t\t\titem.link.classList.remove( 'header-navigation__item--active' );\n\t\t\t\t\t}\n\t\t\t\t} );\n\t\t\t};\n\n\t\t\tconst onScrollFixed = () => {\n\t\t\t\tif ( this.node.getBoundingClientRect().top <= 0 ) {\n\t\t\t\t\tthis.node.style.height = `${ this.node.offsetHeight }px`;\n\t\t\t\t\tthis.node.classList.add( 'header-navigation--sticky' );\n\t\t\t\t} else {\n\t\t\t\t\tthis.node.style.height = '';\n\t\t\t\t\tthis.node.classList.remove( 'header-navigation--sticky' );\n\t\t\t\t}\n\t\t\t};\n\n\t\t\twindow.addEventListener( 'scroll', throttle( onScrollActiveAnchor, 100 ) );\n\t\t\twindow.addEventListener( 'scroll', throttle( onScrollFixed, 5 ) );\n\t\t\tonScrollActiveAnchor();\n\t\t\tonScrollFixed();\n\t\t}\n\n\t\tconst onLinkClick = () => {\n\t\t\t// freeze the masthead temporarily while we click on TOC links cause to prevent the masthead overlaying the TOC while interacting with it\n\t\t\tif ( masthead && masthead.node.classList.contains( 'masthead--unpinned' ) ) {\n\t\t\t\tmasthead.headroom.freeze();\n\n\t\t\t\tif ( typeof this.mastheadFreezeTimeout === 'number' ) {\n\t\t\t\t\tclearTimeout( this.mastheadFreezeTimeout );\n\t\t\t\t\tdelete this.mastheadFreezeTimeout;\n\t\t\t\t}\n\n\t\t\t\tthis.mastheadFreezeTimeout = setTimeout( () => {\n\t\t\t\t\tmasthead.headroom.unfreeze();\n\t\t\t\t\tdelete this.mastheadFreezeTimeout;\n\t\t\t\t}, 1500 );\n\t\t\t}\n\t\t};\n\t\tthis.items.filter( ( item ) => item.target ).forEach( ( item ) => item.link.addEventListener( 'click', onLinkClick ) );\n\n\t\tlet initialIndex = window.location.hash ? Math.max( 0, this.items.map( ( item ) => item.hash ).indexOf( window.location.hash ) ) : 0;\n\t\tthis.setIndex( initialIndex );\n\t\tthis.setState();\n\t}\n\n\t/**\n\t * Scroll forward the scrollable content area\n\t */\n\tscrollForward() {\n\t\tthis.scrollInterval = setInterval( () => {\n\t\t\tthis.content.scrollTo( { left: this.content.scrollLeft + 5 } );\n\n\t\t\tif ( this.forward.disabled ) {\n\t\t\t\tthis.scrollStop();\n\t\t\t}\n\t\t}, 10 );\n\t}\n\n\t/**\n\t * Scroll backwards the scrollable content area\n\t */\n\tscrollBack() {\n\t\tthis.scrollInterval = setInterval( () => {\n\t\t\tthis.content.scrollTo( { left: Math.max( 0, this.content.scrollLeft - 5 ) } );\n\n\t\t\tif ( this.back.disabled ) {\n\t\t\t\tthis.scrollStop();\n\t\t\t}\n\t\t}, 10 );\n\t}\n\n\t/**\n\t * Stop the scrolling interval if it's active\n\t */\n\tscrollStop() {\n\t\tif ( typeof this.scrollInterval === 'number' ) {\n\t\t\tclearInterval( this.scrollInterval );\n\t\t}\n\n\t\tthis.scrollInterval = null;\n\t}\n\n\tsetState() {\n\t\tconst firstItem = this.items[ 0 ].link;\n\t\tconst lastItem = this.items[ this.items.length - 1 ].link;\n\n\t\tif ( firstItem.offsetLeft - this.content.scrollLeft >= 0 ) {\n\t\t\t// first item is is view\n\t\t\tthis.back.disabled = true;\n\t\t\tthis.node.classList.remove( 'header-navigation--fade-in' );\n\t\t} else {\n\t\t\t// first item is outside the scroll area\n\t\t\tthis.back.removeAttribute( 'disabled' );\n\t\t\tthis.node.classList.add( 'header-navigation--fade-in' );\n\t\t}\n\n\t\tif ( this.content.scrollLeft + this.content.offsetWidth >= lastItem.offsetLeft + lastItem.offsetWidth - 1 ) {\n\t\t\t// the last item is fully in view\n\t\t\tthis.forward.disabled = true;\n\t\t\tthis.node.classList.remove( 'header-navigation--fade-out' );\n\t\t} else {\n\t\t\t// last item is outside the scroll area\n\t\t\tthis.forward.removeAttribute( 'disabled' );\n\t\t\tthis.node.classList.add( 'header-navigation--fade-out' );\n\t\t}\n\t}\n\n\tgetIndex() {\n\t\tconst distances = this.items.map( ( item ) => Math.abs( item.offsetLeft - this.content.scrollLeft ) );\n\n\t\treturn distances.indexOf( Math.min( ...distances ) );\n\t}\n\n\tsetIndex( index, behavior = 'smooth' ) {\n\t\tif ( index <= this.items.length ) {\n\t\t\tthis.content.scrollTo( {\n\t\t\t\tleft: this.items[ index ].offsetLeft,\n\t\t\t\tbehavior,\n\t\t\t} );\n\t\t} else if ( interval > 0 ) {\n\t\t\tclearInterval( interval );\n\t\t\tinterval = null;\n\t\t}\n\t}\n\n\tbackIndex() {\n\t\tthis.setIndex( Math.round( Math.max( this.getIndex() - 1, 0 ) ) );\n\t}\n\n\tforwardIndex() {\n\t\tthis.setIndex( Math.round( Math.min( this.getIndex() + 1, this.items.length - 1 ) ) );\n\t}\n}\n\ndocument.addEventListener( 'DOMContentLoaded', () => {\n\tdocument.querySelectorAll( '.header-navigation' ).forEach( ( node ) => {\n\t\tnew HeaderNavigation( node, { ...node.dataset } );\n\t} );\n} );\n"],"names":["fn","time","arguments","length","undefined","timer","throttledFn","_len","args","Array","_key","setTimeout","cancel","clearTimeout","throttle","HeaderNavigation","constructor","node","opts","mode","back","forward","content","items","sticky","interval","querySelector","from","querySelectorAll","map","link","id","target","hash","slice","document","getElementById","window","addEventListener","setState","bind","forwardIndex","backIndex","scrollForward","scrollStop","scrollBack","onScrollActiveAnchor","scrollTop","clientHeight","documentElement","absTarget","distances","filter","item","reduce","Math","abs","getBoundingClientRect","top","closest","Object","keys","forEach","classList","add","remove","onScrollFixed","style","height","offsetHeight","onLinkClick","masthead","contains","headroom","freeze","mastheadFreezeTimeout","unfreeze","initialIndex","location","max","indexOf","setIndex","scrollInterval","setInterval","scrollTo","left","scrollLeft","disabled","clearInterval","firstItem","lastItem","offsetLeft","removeAttribute","offsetWidth","getIndex","min","index","behavior","round","dataset"],"sourceRoot":""}