Examples are great, please add a little tip for node users

[truedat101]

To get going on node.js, something like:

var jssha3 = require('js-sha3');

works after installing js-sha3 via NPM. Thank you for this implementation. This is an impressive piece of work.

[rsodre]

This works for me...

import { keccak_256 } from 'js-sha3';
// or...
var keccak_256 = require('js-sha3').keccak_256;

var result = keccak_256.update('Hello World!').hex();

[emn178]

I added title in README https://github.com/emn178/js-sha3#nodejs