DurableObject aria-disabled

htmx.defineExtension("aria-disabled", {
  // TODO: These types shouldn't be needed once HTMX publishes dist/htmx.d.ts
  // https://github.com/bigskysoftware/htmx/issues/2629
  onEvent(name: string, event: CustomEvent) {
    switch (name) {
      case "htmx:beforeRequest": {
        const target = event.target as HTMLElement;
        if (!target?.getAttribute) return;
        const attrTarget = target.getAttribute("hx-aria-disabled");
        if (!attrTarget) return;

        const internalData = getInternalData(target);
        const disabledCount = (internalData.disabledCount =
          (internalData.disabledCount || 0) + 1);
        internalData.disabled = internalData.disabled ?? new Set();

        if (attrTarget === "this") {
          internalData.disabled.add(target);
        } else {
          const result = querySelectorAllExt(target, attrTarget);
          if (result.length === 0) {
            console.error(
              `The selector "${attrTarget}" on hx-aria-disabled returned no matches!`,
            );
          } else {
            for (const r of result) {
              internalData.disabled.add(r);
            }
          }
        }

        for (const elt of internalData.disabled) {
          if (elt) {
            elt.setAttribute("aria-disabled", "true");
          }
        }

        event.detail.xhr.addEventListener("loadend", () => {
          if (disabledCount === internalData.disabledCount) {
            for (const elt of internalData.disabled) {
              if (elt) {
                elt.removeAttribute("aria-disabled");
              }
            }
          }
        });
        break;
      }
    }
  },
});