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  1. base64-js
  2. =========
  3. `base64-js` does basic base64 encoding/decoding in pure JS.
  4. [![build status](https://secure.travis-ci.org/beatgammit/base64-js.png)](http://travis-ci.org/beatgammit/base64-js)
  5. Many browsers already have base64 encoding/decoding functionality, but it is for text data, not all-purpose binary data.
  6. Sometimes encoding/decoding binary data in the browser is useful, and that is what this module does.
  7. ## install
  8. With [npm](https://npmjs.org) do:
  9. `npm install base64-js` and `var base64js = require('base64-js')`
  10. For use in web browsers do:
  11. `<script src="base64js.min.js"></script>`
  12. ## methods
  13. `base64js` has three exposed functions, `byteLength`, `toByteArray` and `fromByteArray`, which both take a single argument.
  14. * `byteLength` - Takes a base64 string and returns length of byte array
  15. * `toByteArray` - Takes a base64 string and returns a byte array
  16. * `fromByteArray` - Takes a byte array and returns a base64 string
  17. ## license
  18. MIT