hugo-PaperMod/assets/js/fastsearch.js
Aditya Telange ba48765e2c
Use js.Build to fetch fuseOpts;
also load Search on window load
2021-04-10 00:58:23 +05:30

133 lines
4.4 KiB
JavaScript

import * as params from '@params';
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
window.onload = function () {
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 = {
distance: 100,
threshold: 0.4,
ignoreLocation: true,
keys: [
'title',
'permalink',
'summary',
'content'
]
};
if (params.fuseOpts) options = 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("focus")
}
function reset() {
resultsAvailable = false;
resList.innerHTML = sInput.value = ''; // clear inputbox and searchResults
sInput.focus(); // shift focus to input box
}
// execute search as each character is typed
sInput.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.trim()); // 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)
}
resList.innerHTML = resultSet;
resultsAvailable = true;
first = resList.firstChild;
last = resList.lastChild;
} else {
resultsAvailable = false;
resList.innerHTML = '';
}
}
sInput.addEventListener('search', function (e) {
// clicked on x
if (!this.value) reset()
})
// kb bindings
document.onkeydown = function (e) {
let key = e.key;
let ae = document.activeElement;
let inbox = document.getElementById("searchbox").contains(ae)
if (ae === sInput) {
var elements = document.getElementsByClassName('focus');
while (elements.length > 0) {
elements[0].classList.remove('focus');
}
}
if (key === "ArrowDown" && resultsAvailable && inbox) {
e.preventDefault();
if (ae == sInput) {
// if the currently focused element is the search input, focus the <a> of first <li>
activeToggle(); // rm focus class
resList.firstChild.lastChild.focus();
activeToggle(); // add focus 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 focus class
ae.parentElement.nextSibling.lastChild.focus();
activeToggle(); // add focus class
}
} else if (key === "ArrowUp" && resultsAvailable && inbox) {
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 focus class
sInput.focus();
} else {
// otherwise select the previous search result
activeToggle(); // rm focus class
ae.parentElement.previousSibling.lastChild.focus();
activeToggle(); // add focus class
}
} else if (key === "ArrowRight" && resultsAvailable && inbox) {
ae.click(); // click on active link
} else if (key === "Escape") {
reset()
}
}