Bare minimum fetch polyfill in 500 bytes.
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README.md

unfetch
npm travis

unfetch

Tiny 500b fetch "barely-polyfill"

  • Tiny: weighs about 500 bytes gzipped
  • Minimal: just fetch() with headers and text/json/xml responses
  • Familiar: a subset of the full API
  • Supported: supports IE8+ (BYOP)
  • Standalone: one function, no dependencies

🤔 What's Missing?

  • Uses simple Arrays instead of Iterables, since Arrays are iterables
  • No streaming, just Promisifies existing XMLHttpRequest response bodies
  • Bare-bones .blob() implementation - just proxies xhr.response

Table of Contents


Install

This project uses node and npm. Go check them out if you don't have them locally installed.

$ npm install --save unfetch

Then with a module bundler like rollup or webpack, use as you would anything else:

// using ES6 modules
import fetch from 'unfetch'

// using CommonJS modules
var fetch = require('unfetch')

The UMD build is also available on unpkg:

<script src="https://unpkg.com/unfetch/dist/unfetch.umd.js"></script>

This exposes a fetch global if not already present.


Usage

import fetch from 'unfetch'

fetch('/foo.json')
  .then( r => r.json() )
  .then( data => {
    console.log(data)
  })

Examples & Demos

// simple GET request:
fetch('/foo')
  .then( r => r.text() )
  .then( txt => console.log(txt) )


// complex POST request with JSON, headers:
fetch('/bear', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({ hungry: true })
}).then( r => {
  open(r.headers.get('location'));
  return r.json();
})

Contribute

First off, thanks for taking the time to contribute! Now, take a moment to be sure your contributions make sense to everyone else.

Reporting Issues

Found a problem? Want a new feature? First of all see if your issue or idea has already been reported. If it hasn't, just open a new clear and descriptive issue.

Submitting pull requests

Pull requests are the greatest contributions, so be sure they are focused in scope, and do avoid unrelated commits.

  • Fork it!
  • Clone your fork: git clone https://github.com/<your-username>/unfetch
  • Navigate to the newly cloned directory: cd unfetch
  • Create a new branch for the new feature: git checkout -b my-new-feature
  • Install the tools necessary for development: npm install
  • Make your changes.
  • Commit your changes: git commit -am 'Add some feature'
  • Push to the branch: git push origin my-new-feature
  • Submit a pull request with full remarks documenting your changes.

License

MIT License © Jason Miller