var suggestions = document.getElementById('suggestions'); var search = document.getElementById('search'); if (search !== null) { document.addEventListener('keydown', inputFocus); } function inputFocus(e) { if (e.ctrlKey && e.key === '/' ) { e.preventDefault(); search.focus(); } if (e.key === 'Escape' ) { search.blur(); suggestions.classList.add('d-none'); } } document.addEventListener('click', function(event) { var isClickInsideElement = suggestions.contains(event.target); if (!isClickInsideElement) { suggestions.classList.add('d-none'); } }); /* Source: - https://dev.to/shubhamprakash/trap-focus-using-javascript-6a3 */ document.addEventListener('keydown',suggestionFocus); function suggestionFocus(e) { const suggestionsHidden = suggestions.classList.contains('d-none'); if (suggestionsHidden) return; const focusableSuggestions= [...suggestions.querySelectorAll('a')]; if (focusableSuggestions.length === 0) return; const index = focusableSuggestions.indexOf(document.activeElement); if (e.key === "ArrowUp") { e.preventDefault(); const nextIndex = index > 0 ? index - 1 : 0; focusableSuggestions[nextIndex].focus(); } else if (e.key === "ArrowDown") { e.preventDefault(); const nextIndex= index + 1 < focusableSuggestions.length ? index + 1 : index; focusableSuggestions[nextIndex].focus(); } } /* Source: - https://github.com/nextapps-de/flexsearch#index-documents-field-search - https://raw.githack.com/nextapps-de/flexsearch/master/demo/autocomplete.html */ (function(){ var index = new FlexSearch.Document({ tokenize: "forward", cache: 100, document: { id: 'id', store: [ "href", "title", "description" ], index: ["title", "description", "content"] } }); // Not yet supported: https://github.com/nextapps-de/flexsearch#complex-documents /* var docs = [ {{ range $index, $page := (where .Site.Pages "Section" "docs") -}} { id: {{ $index }}, href: "{{ .Permalink }}", title: {{ .Title | jsonify }}, description: {{ .Params.description | jsonify }}, content: {{ .Content | jsonify }} }, {{ end -}} ]; */ // https://discourse.gohugo.io/t/range-length-or-last-element/3803/2 {{ $list := (where .Site.Pages "Section" "docs") -}} {{ $len := (len $list) -}} index.add( {{ range $index, $element := $list -}} { id: {{ $index }}, href: "{{ .RelPermalink }}", title: {{ .Title | jsonify }}, {{ with .Description -}} description: {{ . | jsonify }}, {{ else -}} description: {{ .Summary | plainify | jsonify }}, {{ end -}} content: {{ .Plain | jsonify }} }) {{ if ne (add $index 1) $len -}} .add( {{ end -}} {{ end -}} ; search.addEventListener('input', show_results, true); suggestions.addEventListener('click', accept_suggestion, true); function show_results(){ const maxResult = 5; var value = this.value; var results = index.search(value, {limit: maxResult, enrich: true}); suggestions.classList.remove('d-none'); suggestions.innerHTML = ""; //flatSearch now returns results for each index field. create a single list const flatResults = {}; //keyed by href to dedupe results for (const result of results.flatMap(r => r.result)) { flatResults[result.doc.href] = result.doc; } //construct a list of suggestions list for(const href in flatResults) { const doc = flatResults[href]; const entry = document.createElement('div'); entry.innerHTML = ''; entry.querySelector('a').href = href; entry.querySelector('span:first-child').textContent = doc.title; entry.querySelector('span:nth-child(2)').textContent = doc.description; suggestions.appendChild(entry); if(suggestions.childElementCount == maxResult) break; } } function accept_suggestion(){ while(suggestions.lastChild){ suggestions.removeChild(suggestions.lastChild); } return false; } }());