> ## Documentation Index
> Fetch the complete documentation index at: https://developer.box.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Add Item to Collection

export const MultiRelatedLinks = ({sections = []}) => {
  if (!sections || sections.length === 0) {
    return null;
  }
  return <div className="space-y-8">
      {sections.map((section, index) => <RelatedLinks key={index} title={section.title} items={section.items} />)}
    </div>;
};

export const RelatedLinks = ({title, items = []}) => {
  const getBadgeClass = badge => {
    if (!badge) return "badge-default";
    const badgeType = badge.toLowerCase().replace(/\s+/g, "-");
    return `badge-${badge === "ガイド" ? "guide" : badgeType}`;
  };
  if (!items || items.length === 0) {
    return null;
  }
  return <div className="my-8">
      {}
      <h3 className="text-sm font-bold uppercase tracking-wider mb-4">{title}</h3>

      {}
      <div className="flex flex-col gap-3">
        {items.map((item, index) => <a key={index} href={item.href} className="py-2 px-3 rounded related_link hover:bg-[#f2f2f2] dark:hover:bg-[#111827] flex items-center gap-3 group no-underline hover:no-underline border-b-0">
            {}
            <span className={`px-2 py-1 rounded-full text-xs font-semibold uppercase tracking-wide flex-shrink-0 ${getBadgeClass(item.badge)}`}>
              {item.badge}
            </span>

            {}
            <span className="text-base">{item.label}</span>
          </a>)}
      </div>
    </div>;
};

To add an item to a collection, call the `PUT` endpoint for that specific type of
item and pass along a list of collection IDs.

<Warning>
  The only collection that is available via the API is the "Favorites"
  collection. The ID of this collection is [different for every
  user](/guides/collections/list).
</Warning>

## Add file to collection

To add a file to a collection, call the `PUT /files/:id` API and pass along a
list of collection IDs.

## Add folder to collection

To add a folder to a collection, call the `PUT /folders/:id` API and pass along
a list of collection IDs.

## Add web link to collection

To add a web link to a collection, call the `PUT /web_links/:id` API and pass
along a list of collection IDs.

<RelatedLinks
  title="RELATED APIS"
  items={[
{ label: translate("Update file"), href: "/reference/put-files-id", badge: "PUT" },
{ label: translate("Update folder"), href: "/reference/put-folders-id", badge: "PUT" },
{ label: translate("Update web link"), href: "/reference/put-web-links-id", badge: "PUT" },
{ label: translate("List all collections"), href: "/reference/get-collections", badge: "GET" }
]}
/>
