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index.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Bundler tests</title>
<style>
pre {
margin: 0.5rem 0;
}
pre.header {
background: #ddd;
margin-top: 1.5rem;
padding: 0.25rem 0.75rem;
}
</style>
</head>
<body>
<script>
function log (label, result) {
const pre = document.createElement('pre');
if (typeof result !== 'undefined') {
pre.innerHTML = `${label.padStart(24)} = ${result}`;
} else {
pre.innerHTML = label;
pre.className = 'header';
}
document.body.appendChild(pre);
}
</script>
<script src="bundle-polkadot-util.js"></script>
<script>
log('polkadotUtil');
const { bnToBn, u8aToHex } = polkadotUtil;
log('u8aToHex', u8aToHex(new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8])));
log('bnToBn', bnToBn(123).addn(1).toString());
</script>
<script src="bundle-polkadot-util-crypto.js"></script>
<script>
log('polkadotUtilCrypto');
const { blake2AsHex, randomAsHex, selectableNetworks } = polkadotUtilCrypto;
log('blake2AsHex', blake2AsHex(new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8])));
log('blake2AsHex (js)', blake2AsHex(new Uint8Array([1, 2, 3, 4, 5, 6, 7, 8]), 256, null, true));
log('randomAsHex', randomAsHex());
log('selectableNetworks', selectableNetworks.map(({ displayName }) => displayName).join('; '));
</script>
<script src="bundle-polkadot-keyring.js"></script>
<script>
log('polkadotKeyring');
const { Keyring } = polkadotKeyring;
const { cryptoWaitReady } = polkadotUtilCrypto;
cryptoWaitReady().then(() => {
const keyring = new Keyring({ type: 'sr25519' });
const alice = keyring.addFromUri('//Alice');
log('alice.address', alice.address);
log('signature', u8aToHex(alice.sign('hello world')));
});
</script>
<script src="bundle-polkadot-types.js"></script>
<script>
log('polkadotTypes');
const { TypeRegistry } = polkadotTypes;
const registry = new TypeRegistry();
log('createType', registry.createType('Balance', 1234567890).toHuman());
</script>
<script src="bundle-polkadot-api.js"></script>
<script>
log('polkadotApi');
const { ApiPromise, WsProvider } = polkadotApi;
const provider = new WsProvider('wss://rpc.polkadot.io');
ApiPromise
.create({ provider })
.then((api) =>
// use the derive version, checking that that also works
api.derive.chain.subscribeNewHeads((h) =>
log(polkadotUtil.formatNumber(h.number.unwrap()), h.hash.toHex())
)
);
</script>
</body>
</html>