@zayne-labs/callapi
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A lightweight wrapper over fetch with quality of life improvements like built-in request cancellation, retries, interceptors and more
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<h1 align="center">CallApi</h1>
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<b>An advanced fetch library that actually solves real problems.</b>
</p>
<p align="center">
<a href="https://zayne-labs-callapi.vercel.app"><b>Documentation</b></a> ·
<a href="https://zayne-labs-callapi.vercel.app/docs/getting-started"><b>Getting Started</b></a> ·
<a href="https://github.com/zayne-labs/callapi/tree/main/packages/callapi-plugins"><b>Plugins</b></a>
</p>
---
## Why CallApi?
Fetch is too basic for real apps. You end up writing the same boilerplate: error handling, retries, deduplication, response parsing etc. CallApi handles all of that and practically more.
**Drop-in replacement for fetch. Under 6KB. All kinds of convenience features. Zero dependencies.**
```js
import { callApi } from "@zayne-labs/callapi";
const { data, error } = await callApi("/api/users");
```
## Features
### Request Deduplication
User spam-clicks a button? Handled. No race conditions.
```js
const req1 = callApi("/api/user");
const req2 = callApi("/api/user"); // Cancels req1 (can be configured to share it's response instead)
```
### Smart Response Parsing
Looks at Content-Type and parses accordingly.
```js
const { data } = await callApi("/api/data"); // JSON? Parsed.
```
### Error Handling
Structured errors make robust error handling trivial.
```js
const { data, error } = await callApi("/api/users");
if (error) {
console.log(error.name); // "HTTPError", "ValidationError"
console.log(error.errorData); // Actual API response
}
```
### Retries
Supports exponential backoff and custom retry conditions.
```js
await callApi("/api/data", {
retryAttempts: 3,
retryStrategy: "exponential",
retryStatusCodes: [429, 500, 502, 503],
});
```
### Schema Validation
TypeScript-first types with runtime validation.
```ts
import { createFetchClient } from "@zayne-labs/callapi";
import { defineSchema } from "@zayne-labs/callapi/utils";
import { z } from "zod";
const callMainApi = createFetchClient({
schema: defineSchema({
"/users/:id": {
data: z.object({
id: z.number(),
name: z.string(),
}),
},
}),
});
// Fully typed + validated
const user = await callMainApi("/users/:id", {
params: { id: 123 },
});
```
### Hooks
Hook into CallApi's lifecycle at any point.
```js
const api = createFetchClient({
onRequest: ({ request }) => {
request.headers.set("Authorization", `Bearer ${token}`);
},
onError: ({ error }) => {
Sentry.captureException(error);
},
onResponseStream: ({ event }) => {
console.log(`Downloaded ${event.progress}%`);
},
});
```
### Plugins
Extend functionality with setup, hooks, and middleware.
```js
const metricsPlugin = definePlugin({
id: "metrics",
name: "Metrics Plugin",
setup: ({ options }) => ({
options: {
...options,
meta: { startTime: Date.now() },
},
}),
hooks: {
onSuccess: ({ options }) => {
const duration = Date.now() - options.meta.startTime;
console.info(`Request took ${duration}ms`);
},
},
middlewares: {
fetchMiddleware: (ctx) => async (input, init) => {
console.info("→", input);
const response = await ctx.fetchImpl(input, init);
console.info("←", response.status);
return response;
},
},
});
const api = createFetchClient({
plugins: [metricsPlugin],
});
```
### URL Helpers
Dynamic params, query strings, and method prefixes.
```js
await callApi("/users/:id", { params: { id: 123 } });
await callApi("/search", { query: { q: "test" } });
await callApi("@delete/users/123");
```
And so many more
See the [full documentation](https://zayne-labs-callapi.vercel.app/docs) for the full list of features.
## Installation
```bash
npm install @zayne-labs/callapi
```
```js
import { callApi, createFetchClient } from "@zayne-labs/callapi";
// Simple
const { data } = await callApi("/api/users");
// Configured
const api = createFetchClient({
baseURL: "https://api.example.com",
retryAttempts: 2,
timeout: 10000,
onError: ({ error }) => trackError(error),
});
```
### CDN
```html
<script type="module">
import { callApi } from "https://esm.run/@zayne-labs/callapi";
</script>
```
## What makes it worth considering?
- **TypeScript-first** - Full inference everywhere
- **Familiar API** - If you know fetch, you know CallApi
- **Actually small** - Zero dependencies and Under 6KB, unlike other 50kb libs in the wild
- **Fast** - Built on native Web APIs
- **Works everywhere** - Browsers, Node 18+, Deno, Bun, Cloudflare Workers
## License
MIT © [Ryan Zayne](https://github.com/ryan-zayne)