npm install iost

<script type="text/javascript" src="https://cdn.jsdelivr.net/npm/[email protected]/iost.min.js"></script>

const IOST = require('iost')

// use RPC
const rpc = new IOST.RPC(new IOST.HTTPProvider("http://localhost:30001"));
rpc.blockchain.getChainInfo().then(console.log);

// init iost sdk
let iost = new IOST({ // will use default setting if not set
    gasRatio: 100,
    gasLimit: 2000000,
    delay:0,
}, new IOST.HTTPProvider('http://localhost:30001'));

let account = "abc";
let kp = new IOST.KeyPair(/* your private key in type Buffer */);

iost.setPublisher(account, kp);

// send a call
let handler = iost.callABI("iost.token", "transfer", ["iost", "form", "to", "1000.000"]);

handler
    .onPending(console.log)
    .onSuccess(console.log)
    .onFailed(console.log)
    .send()
    .listen(); // if not listen, only onPending or onFailed (at sending tx) will be called