| 1 | // Shared responsive navigation behavior for the marketing and community headers. |
| 2 | export function initMobileNav() { |
| 3 | document.querySelectorAll("[data-mobile-nav]").forEach((menu) => { |
| 4 | const header = menu.closest(".nav"); |
| 5 | const toggle = header?.querySelector("[data-mobile-nav-toggle]"); |
| 6 | const panel = menu.querySelector(".mobile-nav-panel"); |
| 7 | if (!toggle || !panel) return; |
| 8 | |
| 9 | let closeTimer; |
| 10 | let stateToken = 0; |
| 11 | let returnFocus = toggle; |
| 12 | const focusables = () => Array.from(panel.querySelectorAll( |
| 13 | 'a[href], button:not([disabled]), [tabindex]:not([tabindex="-1"])', |
| 14 | )).filter((element) => !element.closest("[hidden]")); |
| 15 | |
| 16 | const close = (restore = true) => { |
| 17 | stateToken += 1; |
| 18 | clearTimeout(closeTimer); |
| 19 | toggle.setAttribute("aria-expanded", "false"); |
| 20 | menu.setAttribute("aria-hidden", "true"); |
| 21 | menu.classList.remove("is-open"); |
| 22 | document.body.classList.remove("mobile-nav-open"); |
| 23 | closeTimer = window.setTimeout(() => { menu.hidden = true; }, 220); |
| 24 | if (restore) returnFocus.focus(); |
| 25 | }; |
| 26 | |
| 27 | const open = () => { |
| 28 | const token = ++stateToken; |
| 29 | clearTimeout(closeTimer); |
| 30 | returnFocus = document.activeElement instanceof HTMLElement ? document.activeElement : toggle; |
| 31 | menu.hidden = false; |
| 32 | menu.setAttribute("aria-hidden", "false"); |
| 33 | toggle.setAttribute("aria-expanded", "true"); |
| 34 | document.body.classList.add("mobile-nav-open"); |
| 35 | requestAnimationFrame(() => { |
| 36 | if (token === stateToken && !menu.hidden) menu.classList.add("is-open"); |
| 37 | }); |
| 38 | requestAnimationFrame(() => { |
| 39 | if (token === stateToken && !menu.hidden) focusables()[0]?.focus(); |
| 40 | }); |
| 41 | }; |
| 42 | |
| 43 | toggle.addEventListener("click", () => (menu.hidden ? open() : close())); |
| 44 | menu.querySelectorAll("[data-mobile-nav-close]").forEach((button) => button.addEventListener("click", () => close())); |
| 45 | menu.querySelectorAll("a[href]").forEach((link) => link.addEventListener("click", () => close(false))); |
| 46 | menu.addEventListener("keydown", (event) => { |
| 47 | if (event.key === "Escape") { |
| 48 | event.preventDefault(); |
| 49 | close(); |
| 50 | return; |
| 51 | } |
| 52 | if (event.key !== "Tab") return; |
| 53 | const items = focusables(); |
| 54 | if (!items.length) return; |
| 55 | const first = items[0]; |
| 56 | const last = items[items.length - 1]; |
| 57 | if (event.shiftKey && document.activeElement === first) { |
| 58 | event.preventDefault(); |
| 59 | last.focus(); |
| 60 | } else if (!event.shiftKey && document.activeElement === last) { |
| 61 | event.preventDefault(); |
| 62 | first.focus(); |
| 63 | } |
| 64 | }); |
| 65 | menu.addEventListener("transitionend", (event) => { |
| 66 | if (event.propertyName === "opacity" && !menu.classList.contains("is-open")) menu.hidden = true; |
| 67 | }); |
| 68 | window.addEventListener("resize", () => { |
| 69 | if (window.matchMedia("(min-width: 1101px)").matches && !menu.hidden) close(false); |
| 70 | }, { passive: true }); |
| 71 | }); |
| 72 | } |
| 73 |