| | |
| | | import flamethrower from 'flamethrower-router' |
| | | const router = flamethrower() |
| | | export default "SpaScript" |
| | | import micromorph from "micromorph" |
| | | import { CanonicalSlug, RelativeURL, getCanonicalSlug } from "../../util/path" |
| | | |
| | | // adapted from `micromorph` |
| | | // https://github.com/natemoo-re/micromorph |
| | | |
| | | const NODE_TYPE_ELEMENT = 1 |
| | | let announcer = document.createElement("route-announcer") |
| | | const isElement = (target: EventTarget | null): target is Element => |
| | | (target as Node)?.nodeType === NODE_TYPE_ELEMENT |
| | | const isLocalUrl = (href: string) => { |
| | | try { |
| | | const url = new URL(href) |
| | | if (window.location.origin === url.origin) { |
| | | if (url.pathname === window.location.pathname) { |
| | | return !url.hash |
| | | } |
| | | return true |
| | | } |
| | | } catch (e) { } |
| | | return false |
| | | } |
| | | |
| | | const getOpts = ({ target }: Event): { url: URL; scroll?: boolean } | undefined => { |
| | | if (!isElement(target)) return |
| | | const a = target.closest("a") |
| | | if (!a) return |
| | | if ("routerIgnore" in a.dataset) return |
| | | const { href } = a |
| | | if (!isLocalUrl(href)) return |
| | | return { url: new URL(href), scroll: "routerNoscroll" in a.dataset ? false : undefined } |
| | | } |
| | | |
| | | function notifyNav(url: CanonicalSlug) { |
| | | const event: CustomEventMap["nav"] = new CustomEvent("nav", { detail: { url } }) |
| | | document.dispatchEvent(event) |
| | | } |
| | | |
| | | let p: DOMParser |
| | | async function navigate(url: URL, isBack: boolean = false) { |
| | | p = p || new DOMParser() |
| | | const contents = await fetch(`${url}`) |
| | | .then((res) => res.text()) |
| | | .catch(() => { |
| | | window.location.assign(url) |
| | | }) |
| | | |
| | | if (!contents) return |
| | | if (!isBack) { |
| | | history.pushState({}, "", url) |
| | | window.scrollTo({ top: 0 }) |
| | | } |
| | | |
| | | const html = p.parseFromString(contents, "text/html") |
| | | let title = html.querySelector("title")?.textContent |
| | | if (title) { |
| | | document.title = title |
| | | } else { |
| | | const h1 = document.querySelector("h1") |
| | | title = h1?.innerText ?? h1?.textContent ?? url.pathname |
| | | } |
| | | if (announcer.textContent !== title) { |
| | | announcer.textContent = title |
| | | } |
| | | announcer.dataset.persist = "" |
| | | html.body.appendChild(announcer) |
| | | |
| | | micromorph(document.body, html.body) |
| | | |
| | | // now, patch head |
| | | const elementsToRemove = document.head.querySelectorAll(":not([spa-preserve])") |
| | | elementsToRemove.forEach((el) => el.remove()) |
| | | const elementsToAdd = html.head.querySelectorAll(":not([spa-preserve])") |
| | | elementsToAdd.forEach((el) => document.head.appendChild(el)) |
| | | |
| | | notifyNav(getCanonicalSlug(window)) |
| | | delete announcer.dataset.persist |
| | | } |
| | | |
| | | window.spaNavigate = navigate |
| | | |
| | | function createRouter() { |
| | | if (typeof window !== "undefined") { |
| | | window.addEventListener("click", async (event) => { |
| | | const { url } = getOpts(event) ?? {} |
| | | if (!url) return |
| | | event.preventDefault() |
| | | try { |
| | | navigate(url, false) |
| | | } catch (e) { |
| | | window.location.assign(url) |
| | | } |
| | | }) |
| | | |
| | | window.addEventListener("popstate", () => { |
| | | if (window.location.hash) return |
| | | try { |
| | | navigate(new URL(window.location.toString()), true) |
| | | } catch (e) { |
| | | window.location.reload() |
| | | } |
| | | return |
| | | }) |
| | | } |
| | | |
| | | return new (class Router { |
| | | go(pathname: RelativeURL) { |
| | | const url = new URL(pathname, window.location.toString()) |
| | | return navigate(url, false) |
| | | } |
| | | |
| | | back() { |
| | | return window.history.back() |
| | | } |
| | | |
| | | forward() { |
| | | return window.history.forward() |
| | | } |
| | | })() |
| | | } |
| | | |
| | | createRouter() |
| | | notifyNav(getCanonicalSlug(window)) |
| | | |
| | | if (!customElements.get("route-announcer")) { |
| | | const attrs = { |
| | | "aria-live": "assertive", |
| | | "aria-atomic": "true", |
| | | style: |
| | | "position: absolute; left: 0; top: 0; clip: rect(0 0 0 0); clip-path: inset(50%); overflow: hidden; white-space: nowrap; width: 1px; height: 1px", |
| | | } |
| | | customElements.define( |
| | | "route-announcer", |
| | | class RouteAnnouncer extends HTMLElement { |
| | | constructor() { |
| | | super() |
| | | } |
| | | connectedCallback() { |
| | | for (const [key, value] of Object.entries(attrs)) { |
| | | this.setAttribute(key, value) |
| | | } |
| | | } |
| | | }, |
| | | ) |
| | | } |