var fuse;
var showButtons = document.querySelectorAll("[id^='search-button']");
var hideButton = document.getElementById("close-search-button");
var wrapper = document.getElementById("search-wrapper");
var modal = document.getElementById("search-modal");
var input = document.getElementById("search-query");
var output = document.getElementById("search-results");
var first = output.firstChild;
var last = output.lastChild;
var searchVisible = false;
var indexed = false;
var hasResults = false;
// Listen for events
showButtons.forEach((button) => {
button.addEventListener("click", displaySearch);
});
hideButton.addEventListener("click", hideSearch);
wrapper.addEventListener("click", hideSearch);
modal.addEventListener("click", function (event) {
event.stopPropagation();
event.stopImmediatePropagation();
return false;
});
document.addEventListener("keydown", function (event) {
// Forward slash to open search wrapper
if (event.key == "/") {
if (!searchVisible) {
event.preventDefault();
displaySearch();
}
}
// Esc to close search wrapper
if (event.key == "Escape") {
hideSearch();
}
// Down arrow to move down results list
if (event.key == "ArrowDown") {
if (searchVisible && hasResults) {
event.preventDefault();
if (document.activeElement == input) {
first.focus();
} else if (document.activeElement == last) {
last.focus();
} else {
document.activeElement.parentElement.nextSibling.firstElementChild.focus();
}
}
}
// Up arrow to move up results list
if (event.key == "ArrowUp") {
if (searchVisible && hasResults) {
event.preventDefault();
if (document.activeElement == input) {
input.focus();
} else if (document.activeElement == first) {
input.focus();
} else {
document.activeElement.parentElement.previousSibling.firstElementChild.focus();
}
}
}
});
input.onkeyup = function (event) {
// queue an update after each keypress. the last one after some idle time wins
let isFirstRun = throttle(() => executeQuery(this.value));
// on first run, show a spinner
if (isFirstRun) {
output.innerHTML = `
`;
}
};
function throttle(func, time = 750) {
let isFirstRun = throttle.timeout === undefined;
if (!isFirstRun) {
clearTimeout(throttle.timeout);
}
throttle.timeout = setTimeout(() => {
func();
throttle.timeout = undefined;
}, time);
return isFirstRun;
}
function displaySearch() {
if (!indexed) {
buildIndex();
}
if (!searchVisible) {
document.body.style.overflow = "hidden";
wrapper.style.visibility = "visible";
input.focus();
searchVisible = true;
}
}
function hideSearch() {
if (searchVisible) {
document.body.style.overflow = "visible";
wrapper.style.visibility = "hidden";
input.value = "";
output.innerHTML = "";
document.activeElement.blur();
searchVisible = false;
}
}
function fetchJSON(path, callback) {
var httpRequest = new XMLHttpRequest();
httpRequest.onreadystatechange = function () {
if (httpRequest.readyState === 4) {
if (httpRequest.status === 200) {
var data = JSON.parse(httpRequest.responseText);
if (callback) callback(data);
}
}
};
httpRequest.open("GET", path);
httpRequest.send();
}
function buildIndex() {
var baseURL = wrapper.getAttribute("data-url");
baseURL = baseURL.replace(/\/?$/, "/");
fetchJSON(baseURL + "index.json", function (data) {
var options = {
shouldSort: true,
ignoreLocation: true,
threshold: 0.0,
includeMatches: true,
keys: [
{ name: "title", weight: 0.8 },
{ name: "section", weight: 0.2 },
{ name: "summary", weight: 0.6 },
{ name: "content", weight: 0.4 },
],
};
fuse = new Fuse(data, options);
indexed = true;
});
}
function executeQuery(term) {
let results = fuse.search(term);
hasResults = results.length > 0;
if (results.length > 0) {
// prettier-ignore
output.innerHTML = results.map(function (value) {
return `