plugin-prefetch

@spoosh/plugin-prefetch

Prefetch plugin for Spoosh - preload data before it's needed.

Documentation · Requirements: TypeScript >= 5.0 · Peer Dependencies: @spoosh/core

Installation

npm install @spoosh/plugin-prefetch

Usage

import { Spoosh } from "@spoosh/core";
import { create } from "@spoosh/react";
import { prefetchPlugin } from "@spoosh/plugin-prefetch";
import { cachePlugin } from "@spoosh/plugin-cache";
import { retryPlugin } from "@spoosh/plugin-retry";

// Setup - prefetch is returned from create
const spoosh = new Spoosh<ApiSchema, Error>("/api").use([
  prefetchPlugin(),
  cachePlugin(),
  retryPlugin(),
]);
const { useRead, useWrite, prefetch } = create(spoosh);

// Basic prefetch
await prefetch((api) => api("posts").GET());

// Prefetch with query options
await prefetch((api) => api("posts").GET({ query: { page: 1, limit: 10 } }));

// Prefetch with plugin options (staleTime, retries, etc.)
await prefetch(
  (api) => api("users/:id").GET({ params: { id: userId } }),
  {
    staleTime: 60000,
    retries: 3,
  }
);

// Prefetch on hover
<Link
  href="/posts/1"
  onMouseEnter={() => prefetch((api) => api("posts/:id").GET({ params: { id: 1 } }))}
>
  View Post
</Link>

Options

Plugin Config

Option	Type	Default	Description
staleTime	number	-	Default stale time for prefetched data (ms)
timeout	number	30000	Timeout to auto-clear stale promises (ms). Prevents memory leaks.

Prefetch Options

The second argument to prefetch() accepts any plugin options (staleTime, retries, dedupe, etc.) plus:

Option	Type	Description
tags	'all' | 'self' | 'none' | string[]	Tag mode or custom tags (replaces additionalTags)

Examples:

// Mode only - 'all' generates full hierarchy
await prefetch((api) => api("users/:id/posts").GET({ params: { id: "123" } }), {
  tags: "all", // ['users', 'users/123', 'users/123/posts']
});

// Mode only - 'self' generates only exact path
await prefetch((api) => api("users/:id/posts").GET({ params: { id: "123" } }), {
  tags: "self", // ['users/123/posts']
});

// Mode only - 'none' generates no tags
await prefetch((api) => api("posts").GET(), { tags: "none" }); // []

// Custom tags only - replaces auto-generated tags
await prefetch((api) => api("posts").GET(), {
  tags: ["custom", "dashboard"], // ['custom', 'dashboard']
});

// Mode + custom tags - 'all' mode combined with custom tags
await prefetch((api) => api("users/:id/posts").GET({ params: { id: "123" } }), {
  tags: ["all", "dashboard"], // ['users', 'users/123', 'users/123/posts', 'dashboard']
});

// Mode + custom tags - 'self' mode combined with custom tags
await prefetch((api) => api("users/:id/posts").GET({ params: { id: "123" } }), {
  tags: ["self", "dashboard"], // ['users/123/posts', 'dashboard']
});

Features

In-Flight Deduplication (Built-in)

Multiple calls to prefetch the same data will return the same promise, avoiding duplicate requests. This is built into the prefetch plugin - no deduplication plugin required.

// These will only make ONE network request
prefetch((api) => api("posts").GET());
prefetch((api) => api("posts").GET());
prefetch((api) => api("posts").GET());

Memory Leak Prevention

Prefetch automatically clears promise references after completion or after promiseTimeout (default 30s). This prevents memory leaks from requests that never settle.