The game page

Description, Play or Install, favorite, and back.

Now, instead of launching the game when a cover is pressed, we will open a page with its description and its buttons. The page is the <section id="ficha" hidden data-focus-trap> from the HTML:

• hidden: it starts hidden.
• data-focus-trap: while it is visible, focus cannot leave it (the arrows do not escape to the grid behind it).

Change the card’s onclick to onclick: () => abrirFicha(g.id) and add this to main.js (also add description, playtime and year to the imports: import { description, playtime, year } from "/_sdk/kit/format.js";):

let fichaId = null;
let turno = 0; // drop answers for a page that has already closed

const datos = (g) => [g.developer, year(g.releaseDate), playtime(g.playtime)].filter(Boolean).join(" · ");

async function abrirFicha(id) {
  const g = ejg.library.byId(id);
  if (!g) return;
  fichaId = id;
  const miTurno = ++turno;

  const fondo = g.media.hero || g.media.heroThumb;
  const texto = h("div", { class: "descripcion" }, h("p", null, "Cargando…"));
  const botones = h("div", { class: "botones" });
  ficha.replaceChildren(
    h("div", { class: "ficha-fondo", style: fondo ? `background-image: url("${fondo}")` : null }),
    h(
      "div",
      { class: "ficha-contenido" },
      h("div", { class: "ficha-caratula" }, img(g.media.cover || g.media.coverThumb)),
      h(
        "div",
        { class: "ficha-info" },
        h("h2", null, g.title),
        h("p", { class: "datos" }, datos(g)),
        botones,
        texto,
      ),
    ),
  );
  pintarBotones(g);
  ficha.hidden = false;
  ejg.sound.play("open");
  foco.first(botones);
  pistasFicha();

  // The long description is not in the library: it is requested separately.
  try {
    const d = await ejg.game.details(id);
    if (miTurno !== turno) return;
    texto.replaceChildren(description(d.description || d.shortDescription || "Sin descripción."));
  } catch {
    if (miTurno === turno) texto.replaceChildren(h("p", null, "No se ha podido cargar la descripción."));
  }
}

(and const ficha = document.querySelector("#ficha"); next to the other constants).

• ejg.library.byId(id) returns the game instantly, with no waiting.
• ejg.game.details(id) asks for what the library does not include: the description, screenshots (screenshots), trailers (trailers) and recent sessions (recentSessions). It is asynchronous, so we paint the page first and fill in the text afterwards. turno keeps a game’s description from landing on another game’s page if the user opens and closes pages quickly.
• description(text) turns the description format (## title, - bullet and paragraphs separated by a blank line) into safe HTML elements. Do not use innerHTML with text that comes from outside.
• playtime(seconds) → “12 h 34 min” or “Not played”. year(date) → “2017”.
• Here we do use the large images (cover, hero): a page has only one.

The buttons are separate because they are repainted when something changes (favorite, a session in progress):

function pintarBotones(g) {
  const caja = ficha.querySelector(".botones");
  if (!caja) return;
  const enMarcha = ejg.game.isRunning(g.id);
  const antes = foco.current?.dataset.accion;
  caja.replaceChildren(
    h(
      "button",
      { class: "boton principal", "data-focus": "", "data-accion": "jugar", onclick: () => jugar(g.id) },
      enMarcha ? "En marcha" : "Jugar",
    ),
    h("button", { class: "boton", "data-focus": "", "data-accion": "fav", onclick: () => ejg.game.favorite(g.id) }, g.favorite ? "★ Favorito" : "☆ Favorito"),
    h("button", { class: "boton", "data-focus": "", "data-accion": "editar", onclick: () => ejg.game.edit(g.id) }, "Editar"),
    h("button", { class: "boton", "data-focus": "", "data-accion": "volver", onclick: cerrarFicha }, "Volver"),
  );
  // After repainting, focus returns to the same button.
  const b = antes && caja.querySelector(`[data-accion="${antes}"]`);
  if (b) foco.focus(b, { noScroll: true, silent: true });
}

async function jugar(id) {
  if (ejg.game.isRunning(id)) return;
  const b = ficha.querySelector('[data-accion="jugar"]');
  if (b) b.textContent = "Iniciando…";
  try {
    await ejg.game.launch(id); // ejGames plays the launch sound
  } catch (e) {
    ejg.ui.toast(String(e.message || e), "error");
  }
  const g = ejg.library.byId(id);
  if (g && fichaId === id) pintarBotones(g);
}

function cerrarFicha() {
  if (ficha.hidden) return;
  const id = fichaId;
  fichaId = null;
  turno++;
  ficha.hidden = true;
  ficha.replaceChildren();
  ejg.sound.play("back");
  pistasRejilla();
  const t = rejilla.querySelector(`[data-id="${id}"]`);
  if (t) foco.focus(t, { silent: true });
  else foco.first(rejilla);
}

• Play, or Running if ejg.game.isRunning(id). The example’s source strings are Jugar and En marcha.
• ejg.game.edit(id) opens ejGames’ game editor (name, art, executable…). When it closes, focus-return arrives and focus returns to the button.

What is left is to teach bindNav that Back closes the page and that the favorite also works inside it, to change the hints depending on where you are, and to repaint when something changes:

bindNav(foco, {
  // With no page open we return false, so ejGames handles "Back".
  back: () => {
    if (ficha.hidden) return false;
    cerrarFicha();
  },
  y: () => {
    const id = fichaId ?? Number(foco.current?.dataset.id);
    if (!id) return false;
    ejg.game.favorite(id);
  },
  menu: () => {
    ejg.ui.open("menu");
  },
});

const pistas = hints(document.querySelector("#pistas"), []);
const pistasRejilla = () => pistas.set([["accept", "Abrir"], ["y", "Favorito"], ["menu", "Menú"]]);
const pistasFicha = () => pistas.set([["accept", "Elegir"], ["back", "Volver"], ["y", "Favorito"]]);

const repintar = debounce(() => {
  pintar();
  if (fichaId) {
    const g = ejg.library.byId(fichaId);
    if (!g) return cerrarFicha();
    pintarBotones(g);
    ficha.querySelector(".datos").textContent = datos(g); // the hours, when the game closes
  }
}, 50);
ejg.library.onChange(repintar); // new games, favorites, covers…
ejg.on("running", repintar); // a game starts or ends

pintar();
pistasRejilla();

Replace your previous bindNav, the hint bar and the last two lines with this, and add debounce to the dom.js import. It groups several notices in a row into a single repaint. When a game closes, its new hours arrive through the same notice, which is why repintar also updates the open page. The page CSS, in short (the full file is in examples/ejemplo-tema/style.css):

.ficha { position: fixed; inset: 0; z-index: 10; overflow-y: auto; background: var(--fondo); }
.ficha-fondo { position: absolute; inset: 0 0 auto; height: 75vh; background: center / cover no-repeat; opacity: 0.35;
               mask-image: linear-gradient(#000 35%, transparent); }
.ficha-contenido { position: relative; display: flex; align-items: flex-start; gap: 40px; padding: 90px 64px 64px; max-width: 1200px; }
.ficha-caratula { flex: none; width: 240px; aspect-ratio: 2 / 3; border-radius: 12px; overflow: hidden; background: var(--panel); }
.ficha-caratula img { width: 100%; height: 100%; object-fit: cover; }
.ficha-caratula img.img-empty, .ficha-caratula img.img-error { display: none; }
.botones { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 26px; }
.boton { padding: 10px 18px; border-radius: 8px; background: color-mix(in srgb, var(--texto) 10%, transparent); }
.boton.principal { padding-inline: 30px; background: var(--acento); color: #fff; font-weight: 600; }
.boton.is-focused { box-shadow: 0 0 0 3px var(--texto); }

Want guides on your page? The kit view createGuideView brings the list of Steam community guides and a reader you can use with a controller. You mount it in a container and dress it with CSS. See Community guides.