Steem.js

<script src="./steem.min.js"></script>
<script>
steem.getAccounts(['ned', 'dan'], function(err, response){
    console.log(err, response);
});
</script>

<script src="//cdn.steemjs.com/lib/steem.min.js"></script>

$ npm install steem --save

var steem = require('steem');

steem.broadcast.vote(username, password, author, permlink, weight, function(err, result) {
	console.log(err, result);
});

steem.api.getAccounts(['ned', 'dan'], function(err, result) {
	console.log(err, result);
});

steem.api.getState('/trends/funny', function(err, result) {
	console.log(err, result);
});

var reputation = steem.formatter.reputation(user.reputation);
console.log(reputation);