hugo-PaperMod/assets/js/fastsearch.js

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JavaScript
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var fuse; // holds our search engine
var resList = document.getElementById('searchResults');
var sInput = document.getElementById('searchInput');
var first, last = null
var resultsAvailable = false;
// load our search index, only executed onload
function loadSearch() {
var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function () {
if (xhr.readyState === 4) {
if (xhr.status === 200) {
var data = JSON.parse(xhr.responseText);
if (data) {
// fuse.js options; check fuse.js website for details
var options = {
isCaseSensitive: false,
shouldSort: true,
location: 0,
distance: 100,
threshold: 0.4,
minMatchCharLength: 0,
keys: [
'title',
'permalink',
'summary',
'content'
]
};
{{ if . }}options = {{ jsonify . }}{{ end }} // load custom options from .Site.Params.fuseOpts
fuse = new Fuse(data, options); // build the index from the json file
}
} else {
console.log(xhr.responseText);
}
}
};
xhr.open('GET', "../index.json");
xhr.send();
}
function itemGen(name, link) {
return `<li class="post-entry"><header class="entry-header">${name}&nbsp;»</header><a href="${link}" aria-label="${name}"></a></li>`
}
function activeToggle() {
document.activeElement.parentElement.classList.toggle("active")
}
// execute search as each character is typed
document.getElementById("searchInput").onkeyup = function (e) {
// run a search query (for "term") every time a letter is typed
// in the search box
const results = fuse.search(this.value); // the actual query being run using fuse.js
if (results.length !== 0) {
// build our html if result exists
let resultSet = ''; // our results bucket
for (let item in results) {
resultSet = resultSet + itemGen(results[item].item.title, results[item].item.permalink)
}
document.getElementById("searchResults").innerHTML = resultSet;
resultsAvailable = true;
first = resList.firstChild;
last = resList.lastChild;
} else {
resultsAvailable = false;
document.getElementById("searchResults").innerHTML = '';
}
}
// kb bindings
document.onkeydown = function (e) {
let key = e.key;
let ae = document.activeElement;
if (key === "ArrowDown" && resultsAvailable) {
e.preventDefault();
if (ae == sInput) {
// if the currently focused element is the search input, focus the <a> of first <li>
activeToggle(); // rm active class
resList.firstChild.lastChild.focus();
activeToggle(); // add active class
} else if (ae.parentElement == last) {
// if the currently focused element's parent is last, do nothing
} else {
// otherwise select the next search result
activeToggle(); // rm active class
ae.parentElement.nextSibling.lastChild.focus();
activeToggle(); // add active class
}
} else if (key === "ArrowUp" && resultsAvailable) {
e.preventDefault();
if (ae == sInput) {
// if the currently focused element is input box, do nothing
} else if (ae.parentElement == first) {
// if the currently focused element is first item, go to input box
activeToggle(); // rm active class
sInput.focus();
} else {
// otherwise select the previous search result
activeToggle(); // rm active class
ae.parentElement.previousSibling.lastChild.focus();
activeToggle(); // add active class
}
} else if (key === "ArrowRight" && resultsAvailable) {
ae.click(); // click on active link
} else if (key === "Escape") {
resultsAvailable = false;
document.getElementById("searchResults").innerHTML = sInput.value = ''; // clear inputbox and searchResults
sInput.focus(); // shift focus to input box
}
}
document.onmousedown = function (e) {
if (e.type === "mousedown") {
e.preventDefault(); // prevent mousedown to change focus
}
}