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function getById(id) {
let element = document.getElementById(id);
if (element) {
return element;
} else {
throw `Element with id '${id}' not found.`;
}
}
/**
* @param {string} href
* @returns {HTMLAnchorElement}
*/
function a(href, pageName) {
const aElem = document.createElement("a");
aElem.href = href;
aElem.text = pageName;
return aElem;
}
function div(...children) {
const divElem = document.createElement("div");
divElem.replaceChildren(...children);
return divElem;
}
function span(text) {
const spanElem = document.createElement("span");
spanElem.textContent = text;
return spanElem;
}
function h(elementTag, ...children) {
const elem = document.createElement(elementTag);
elem.replaceChildren(...children);
return elem;
}
/** @param {HTMLElement} element */
function addClass(element, newClass) {
element.classList.add(newClass);
return element;
}
function writeError(error) {
writeLog(error, "error");
}
function writeInfo(msg) {
writeLog(msg, "info");
}
function writeDebug(msg) {
writeLog(msg, "debug");
}
function writeLog(msg, className) {
if (typeof msg === "string" || msg instanceof String) {
log.appendChild(div(addClass(span(msg), className)));
} else {
log.appendChild(div(addClass(msg, className)));
}
}
function resetLog() {
log.replaceChildren();
}
const log = getById("log");
// https://stackoverflow.com/questions/75988682/debounce-in-javascript
// https://www.joshwcomeau.com/snippets/javascript/debounce/
function debounce(callback, wait) {
let timeoutId = null;
return (...args) => {
window.clearTimeout(timeoutId);
timeoutId = window.setTimeout(() => {
callback(...args);
}, wait);
};
}
const stylesheet = new CSSStyleSheet();
stylesheet.replaceSync(`
a {
color: var(--color);
}
nav > ul {
list-style-type: none;
padding-inline-start: 0;
}
nav > ul > li {
display: inline-block;
}
nav > ul > li > a::after {
display: inline-block;
color: var(--color);
content: ">";
padding: 0 1em;
}
`);
customElements.define("mb-nav",
class MBNav extends HTMLElement {
constructor() {
super();
}
get pagename() {
return this.getAttribute("pagename");
}
set pagename(value) {
this.setAttribute("pagename", value);
}
connectedCallback() {
const shadow = this.attachShadow({ mode: "open" });
shadow.adoptedStyleSheets = [stylesheet];
shadow.appendChild(
h("nav",
h("ul",
h("li", a("/", "MB.bes.is")),
h("li", span(this.pagename)),
)
)
)
}
});
export {
getById,
a,
div,
span,
h,
addClass,
writeError,
writeInfo,
writeDebug,
resetLog,
debounce,
};
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