fetch-again v1.2.0

FETCH-AGAIN

fetch wrapper adding retry functionality without replacing the actual fetch (2.0 Kb, 1.0 Kb. minified).

Setup

Install as a dependency:

npm install --save fetch-again

Import fetch-again somewhere in your application or load the umd version in the index.html:

// main.js
import 'fetch-again';
// ...

<!-- index.html -->
<script src="dist/fetch-again.umd.js"></script>

fetchAgain() will be now available from window.

Module Formats

There are three module formats beign distributed whith this package, UMD, ES2015 and ES6, for loading an specific one configure your loader to use main, module or jsnext:main properties of package.json, respectively. There is also a mified version for the UMD module.

You can also opt for importing a concrete bundle from dist folder:

import 'fetch-again/dist/fetch-again'; // ES2015
import 'fetch-again/dist/fetch-again.umd'; // UMD
import 'fetch-again/dist/fetch-again.umd.min'; // UMD minified
import 'node_modules/fetch-again/index'; //ES6

Supported environments

An script will automatically check if your environment supports the fetch API, if it doesn't an error will be thrown suggesting to look at the polyfill.

Note: this package is not restricted to work only in browsers, if you somehow use fetch in a Node.js environment then fetchAgain will be available from global.

API

fetchAgain(url, fetchOptions, requestLimit, retryDelay)
    .then((response) => console.log(response))
    .catch((error)) => console.log(error));

• url: address to fetch (default undefined)
• fetchOptions: options for fetch API, can be an object or a Request (default {})
• requestLimit: number of times to attemp fetching (default 1)
• retryDelay: number of milliseconds to wait for next fetch if the actual one fails (defaul 1000)

If requestLimit not specified by default will act like a normal fetch.

Example

const fetchOptions = {
        method: 'POST',
        content:'no-cors'
};

fetchAgain('https://www.somedomain.io', fetchOptions, 5 , 2000 , )
    .then((response) => console.log(response))
    .catch((error)) => console.log(error));


// using it as a normal fetch:
fetchAgain('https://www.somedomain.io', fetchOptions)
    .then((response) => console.log(response))
    .catch((error)) => console.log(error));

Changelog

• Changed API so if no requestLimit is specified it defaults to 1, therefore allowing to use it like a the default fetch whith out the need to pass 0 to requestLimit and retryDelay in order to specify the fetchOptions.
• Slight performance improvements when no retries will be attempted.
• Added minified version.

License

MIT